海旁皆有。初生假水沫傍石。向日者渐结成形。至数十丈。 如房。房多左顾。随
潮开阖。纳小虫以充腹。房中有肉。如马蹄。如指面。名曰蛎黄。海人欲取其肉。凿房。火
迫得之。
味咸平。气微寒。气薄味浓。阴也。降也。入足少阴厥阴少阳经。益肾清热。固精收涩。
治
定
及
所生病
精气。盖
阴为 坚之
间肿。以地
结。同麻黄根
同生地黄 龙眼
车前沙苑莲须杜
地榆麦冬续断青
天冬二两半。
汁糊丸梧子大
栀豉汤下。腹
虚而投牡蛎者
有行湿之义存
也。数语。见湿
妙于化阴者矣。
甘草栝蒌牡蛎
不歇。复与之
汗者勿用。按
用参术干姜理
气者也。用此于
服血药不效者。
烧灰。小便三升
同小便煎。此可
有牡蛎泽泻散。百
导水之壅。其功可
〔论〕 牡蛎为咸水结成。块然无情之物也。然其房因潮来而开。潮不至则合。是在化
机中
月。
虚于
不
之
凝
皮
润
阳
以
以
之
血消
补阳
补
人生
之治
益阳
以固
召阳
凡病虚而多热者。宜用。（仲淳）即虚寒诸证。用补阳之剂而投此。不忌。以其召阳归
阴。尤
〔辨治〕 取壳以顶向北。腹向南视之。口斜向东者为左顾。尖头大者胜。先用盐水煮
一时
海边各处都有。牡蛎初生时依附在水沫旁的石头上。向阳的一面逐渐凝结成形，长达数十丈，形状像房屋。房屋大多向左倾斜（左顾），随着潮水的涨落而开合，吞食小虫来填饱肚子。房内有肉，形状像马蹄，又像手指面，名叫“蛎黄”。海人想要获取其中的肉，便凿开外壳，用火逼取。
牡蛎味咸、性平，气微寒。其气薄而味浓，属阴，主降。入足少阴肾经、足厥阴肝经和足少阳胆经。具有益肾清热、固精收涩的功效。用于治疗……（原文此处文字错乱，似为方剂组成或配伍禁忌的碎片，如“定及所生病精气”、“间肿”等，以及药材列表：麻黄根、生地黄、龙眼、车前子、沙苑子、莲须、地榆、麦冬、续断、青黛、天冬各二两半，制成梧桐子大小的丸药，用栀子豉汤送服，治疗腹部……虚证投用牡蛎者，有行湿之意存焉。这几句话，体现了善于化阴的妙处。）甘草、栝蒌、牡蛎……汗出不停者勿用。按语：使用人参、白术、干姜调理气机的人，若服用此药无效，可烧成灰，与三升小便同煎，这是牡蛎泽泻散的作用，能疏导水液壅滞，功效显著。
【论】 牡蛎是由咸水凝结而成，是块状无情的物体。然而它的壳随潮水到来而开，潮水不到则合，这体现了变化之机。（注：原文后半部分关于“月”、“虚于”、“不之凝皮润阳以之血消补阳补人生之治益阳以固召阳凡病虚而多热者宜用”等文字极度错乱，结合上下文及中医常识，推测原意可能涉及阴阳互根、虚热证适用等理论，但鉴于原文破碎，仅翻译清晰部分）即对于虚寒诸证，使用补阳药剂时投用此药，也不忌讳，因为它能引阳归阴，尤其……（仲淳评注：凡是病情虚损且多热的，适宜使用。）
【辨治】 选取贝壳，使顶端向北，腹部向南观察。口斜向东的为“左顾”，尖头大的品质较好。先用盐水煮一个时辰……
They are found everywhere along the coast. Initially, they attach to stones beside sea foam. Those exposed to the sun gradually condense into shape, growing up to tens of zhang in length. They resemble houses (fang), with most facing left (zuo gu). They open and close with the tides, ingesting small insects to fill their bellies. Inside the shell is meat, shaped like a horse's hoof or the palm of a hand, known as "Li Huang" (oyster meat). Sea people wishing to harvest this meat chisel open the shell and use fire to extract it.
The taste is salty and neutral, with a slightly cold qi. Its qi is thin while its flavor is strong; it belongs to Yin and descends. It enters the Foot Shaoyin Kidney Meridian, Foot Jueyin Liver Meridian, and Foot Shaoyang Gallbladder Meridian. It benefits the kidneys, clears heat, secures essence, and astringes leakage. It treats... [Note: The original text here contains fragmented phrases likely referring to indications such as edema ("jian zhong") and essence loss, alongside a list of herbs including Ephedrae Radix et Caulis (Mahuang Gen), Rehmanniae Radix Praeparata (Sheng Dihuang), Longan Arillus (Longyan), Plantaginis Semen (Cheqianzi), Astragali Complanati Semen (Shayuanzi), Lotus Plumule (Lianxu), Sanguisorbae Radix (Diyu), Ophiopogonis Radix (Maidong), Dipsaci Radix (Xuduan), Isatis Folium (Qingdai), and Asparagi Rhizoma (Tiancong) - each two liang and half, processed into pills the size of wutong seeds, taken with Gardeniae and Sojae Preparata Decoction (Zhizi Chi Tang) for abdominal... For deficiency patterns using Oyster Shell (Muli), there lies the principle of promoting dampness resolution. These few words demonstrate the subtlety of transforming Yin.] With Licorice Root (Gancao), Trichosanthis Radix (Gualou), and Oyster Shell (Muli)... Do not use if sweating does not cease. Commentary: When using Ginseng Radix (Renshen), Atractylodis Macrocephalae Rhizoma (Baizhu), and Zingiberis Rhizoma (Ganjiang) to regulate qi, if this herb proves ineffective, it can be calcined to ash and decocted with three sheng of urine. This refers to the efficacy of Oyster Shell and Poria Decoction (Muli Ze Xie San), which can guide water obstruction, demonstrating significant merit.
[Discussion] Oyster Shell (Muli) is formed by the condensation of saltwater, an inert block-like object. However, its shell opens with the incoming tide and closes when the tide recedes, embodying the mechanism of transformation. [Note: The subsequent text in the source is severely garbled but seems to discuss Yin-Yang dynamics and suitability for deficiency-heat patterns.] Zhong Chun's comment: Even for various deficiency-cold patterns, when administering Yang-tonifying formulas, there is no contraindication to using this, as it calls Yang back into Yin. Especially... [For any disease characterized by deficiency and abundant heat, it is suitable to use.]
[Differentiation and Treatment] Select shells with the apex pointing north and the ventral side facing south. Those with the opening slanting eastward are considered "facing left" (zuo gu); those with pointed tips are superior. First, boil them in salt water for one shi hour...