Annals of the South African MuseumAnnale van die Suid-Afrikaanse Museum . brae. Huene (1906) originally noted that AM41/109 differed from Thecodontosaurus and resembled YPM 1883 in havingvery elongate dorsal vertebrae. Later Huene (1914ft) figured an extremelyshort centrum of AM 41/109 as that of a dorsal vertebra. Although notstated, this implied that the dorsal vertebrae of AM 41/109 are extremelyshort as in Thecodontosaurus. The isolated centrum figured by Huene(1914ft) could not be located but judging from the proportions it wasprobably part of an anterior caudal vertebra. The proportions
Annals of the South African MuseumAnnale van die Suid-Afrikaanse Museum . brae. Huene (1906) originally noted that AM41/109 differed from Thecodontosaurus and resembled YPM 1883 in havingvery elongate dorsal vertebrae. Later Huene (1914ft) figured an extremelyshort centrum of AM 41/109 as that of a dorsal vertebra. Although notstated, this implied that the dorsal vertebrae of AM 41/109 are extremelyshort as in Thecodontosaurus. The isolated centrum figured by Huene(1914ft) could not be located but judging from the proportions it wasprobably part of an anterior caudal vertebra. The proportions of anisolated neural arch (Galton in press, fig. 3a-c) and of a centrum (Galtonin press, fig. 5c) show that the dorsal vertebrae of AM 41/109 were probablyelongate ( the centra were low) as in YPM 1883 (Fig. 9K). 3. Slendcrness of neural spines of anterior caudal vertebrae. This comparisonby Huene (1906) was based on misleading figures given by Cope (1870)and Marsh (1893, 1895, 1896). Cope (1870: pi. 8 (fig. 7): see Lull 1953: 134 ANNALS OF THE SOUTH AFRICAN MUSEUM. jH .^S» mm s^ *> *4T f mi Fig. 6. Anchisaurus capensis (Broom), SAM-990. Stereophotograph of right pes in ventral view. fig. 12a) did not indicate that the neural spines of the anterior caudalvertebrae of AM 41/109 were damaged and incomplete (Fig. 9P); originallythe neural spines were broader and not as narrow as in the vertebraereferred to Thecodontosaurus (Fig. 9S) by Huene (1907-08: pi. 77 (fig. 4);19146: fig. 40). Most of the supposed differences between AM 41,109 and YPM 1883 wereeither the result of misinterpretation (1-3 above, different position of fourthtrochanter of femur) or the result of differences in preservation (form of radius,metacarpals, tibia, fibula: see Galton in press). YPM 1883 does differ fromAM 41/109 in having a proportionally long centrum to the last dorsal vertebra(but this might be sacral vertebra 3) and a proportionally smaller manus witha less trenchant first ungual phalanx (F
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