. Bulletin of the British Museum (Natural History). go OBSERVATIONS ON THE HEART IN THE FAMILY TRIONYCHIDAE bifurcating into a wider right carotid artery and a narrow left carotid arterj'. The right subclavian starts from an orifice (Text-fig. 9, No. 4, sub, art. r. op.) in the ventral wall of the innominate at a short but quite distinguishable distance behind the right carotid. The left subclavian artery likewise originates from the ventral wall of the innominate but its orifice (sub. art. 1. op.) is almost ventral to that of the cdr, I. arc. r. car. art. r. sub.

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. Bulletin of the British Museum (Natural History). go OBSERVATIONS ON THE HEART IN THE FAMILY TRIONYCHIDAE bifurcating into a wider right carotid artery and a narrow left carotid arterj'. The right subclavian starts from an orifice (Text-fig. 9, No. 4, sub, art. r. op.) in the ventral wall of the innominate at a short but quite distinguishable distance behind the right carotid. The left subclavian artery likewise originates from the ventral wall of the innominate but its orifice (sub. art. 1. op.) is almost ventral to that of the cdr, I. arc. r. car. art. r. sub. art. r. sys. arc. r. innom. art. r. c. car. art. I. sys. arc. L car. art. I. car. . Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)

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