Transactions and proceedings and report of the Philosophical Society of Adelaide, South Australia . Fig. 8. The form of the external , fully-haired embryo. F, young adult. which certain elevations are prominent. Since the nomen-clature of the various processes of the auricle is by no meansuniform, and since the processes under consideration aredefinite elevations of the developing antihelix, they are heretermed the processi antikelicis. Of several such processeswhich are apparent in the earlier stages, that which is situ-ated most dorsally (cephalic) upon the antihelix retains thegreater
Transactions and proceedings and report of the Philosophical Society of Adelaide, South Australia . Fig. 8. The form of the external , fully-haired embryo. F, young adult. which certain elevations are prominent. Since the nomen-clature of the various processes of the auricle is by no meansuniform, and since the processes under consideration aredefinite elevations of the developing antihelix, they are heretermed the processi antikelicis. Of several such processeswhich are apparent in the earlier stages, that which is situ-ated most dorsally (cephalic) upon the antihelix retains thegreater degree of independent development as growth proceeds. 369. Fig. 9. Left manus (drawn from Specimen female B,Perth Museum). 370 This processus antihelicis becomes the tragoid projection;metatragus, or supratragus of authors. A true traguscannot be said to be present, but a small antitragus isdeveloped on the ventral (caudal) border of the helix single processus antihelicis which is present in Trichosurusis a purely functional structure which fits into the conchalorifice of the auditory meatus when the auricle is folded down-wards and forwards as in sleep. As such the process may bedescribed as a meatal operculum. Manus.—The digital formula of young specimens iseither 3>4>2>5>1, or 3 = 4>2>5>1 (see fig. 9). Theclassical formula 4>3>2>»5>» 1 is not seen in young ex-amples, and it is by no means invariable in the adult. Claws are developed at the 32 mm. stage upon all the digits. Uponthe dorsal surface the hair is continued to the ends of theungual phalanges, the hair having a distal and an ulnartre
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1878
