The American journal of anatomy . th the jugulo-subclavian tap in themammal (cf. fig. 62, 16 mm. cat embryo, Huntington and Mc-McClure). In the chick at this stage a second tap is lacking,but it is not improbable that a study of later stages will reveala homologue of the common jugular tap in the mammal. Accord-ing to the descriptions and figures of the anatomy of the lym-phatics in birds, a branch of the lymphatic trunk from the headand neck, which occurs as a variant on the right side, opens intothe jugular or the precaval vein. There is good reason to assumethat there exists a considerable

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The American journal of anatomy . th the jugulo-subclavian tap in themammal (cf. fig. 62, 16 mm. cat embryo, Huntington and Mc-McClure). In the chick at this stage a second tap is lacking,but it is not improbable that a study of later stages will reveala homologue of the common jugular tap in the mammal. Accord-ing to the descriptions and figures of the anatomy of the lym-phatics in birds, a branch of the lymphatic trunk from the headand neck, which occurs as a variant on the right side, opens intothe jugular or the precaval vein. There is good reason to assumethat there exists a considerable variability in the communicationsbetween the lymphatic trunks and the veins, as in the cat, andthat a careful investigation of the anatomical relations in the adultbird will serve to bring them into accord with the conditions inthe mammal. A lymph sac in the adult bird has not been described or figured,so far as the writer is aware. However, the conditions in the THE AMERICAN JOURNAL OP ANATOMY, VOL. 12, NO. 4 490 A. M. MILLER oa. >^W/f^i ?•? *:* J« 4 »^.* g;-* >>; ^^v: %»^ t?^^}

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectanatomy, bookyear1901