142 DR. A. SMITH WOODWARD ON [May I907, 



The large head viewed from above or below, as in the type- 

 specimen (PI. IX, fig. 1), is elongate- triangular in shape, with a 

 sharply-pointed snout. None of its external bones are sculptured. 

 The orbit (orb.) and the antorbital vacuity are very large, as shown 

 best in one of the British Museum specimens (PI. IX, fig. 2) ; and 

 a small, separate, lateral narial opening appears to be distinguishable 

 in the type. The interorbital region is very narrow. No traces of 

 teeth are seen in any specimen : hence it is probable that they were 

 inconspicuous or absent. Apart from the dentition, the general 

 aspect of the skull must have been much like that of the Elgin 

 Ornithosuchus or the American Triassic Anchisaurus. 



The presacral vertebras are preserved in regular sequence in the 

 type-specimen, and are about 21 in total number. The centra are 

 slightly constricted, and not much longer than wide ; each slender 

 neural spine has a basal extent nearly equalling the length of the 

 centrum to which it belongs. Seven vertebrae may be reckoned as 

 cervical, but it is not certain whether they bore ribs. The thoracic 

 ribs are slender and gently curved. Four vertebrae, of the same size as 

 the preceding, are comprised within the extent of the ilium (il.), and 

 each bears a pair of broad transverse processes or sacral ribs. The 

 anterior caudal vertebrae, well seen in the type-specimen, are also 

 equally large, and at least four of them bear broad transverse 

 processes. The chevron-bones, of which some are seen scattered in 

 Mr. Taylor's second fossil (PL IX, fig. 35), are delicate and not 

 much elongated, with the ascending arms not united above by a 

 bridge of bone. The terminal caudal vertebrae, which occur in 

 short series in the same specimen, are much attenuated, and 

 indicate that the tail was long and slender (PI. IX, fig. 3 a). 



The scapula, which is most satisfactorily shown in the British 

 Museum specimen (PI. IX, fig. 2, sc), is a narrow slender blade, 

 with the distal end scarcely expanded. Its length equals that of 

 three to four anterior dorsal vertebrae. The humerus (Ji) is very 

 slender, as long as the fore-arm (r), and not much expanded at the 

 upper end. The manus is indistinctly exhibited and probably 

 incomplete in the type-specimen, but traces of three slender digits 

 are preserved. The hollows in the fossil left by the pelvis cannot 

 be exactly interpreted. It may only be stated that the ilium is 

 antero-posteriorly extended for the length of four vertebrae ; that 

 the pubis, which slopes downward and forward, is not rod-shaped, 

 but expanded into a narrow lamina which tends towards meeting 

 its fellow of the opposite side in the median line ; and that the 

 ischium is a comparatively-thick rod (as shown on the left side of 

 Mr. Taylor's second fossil). A bar of matrix on both sides of the 

 type-specimen and appearances in the second fossil suggest that the 

 acetabulum was perforate, but this is not certain. The femur (/) 

 is nearly straight, and very little shorter than the tibia. The 

 cnemial crest of the tibia (t\ as best seen in Mr. Taylor's second 

 specimen, is not very prominent; and the large size of the internal 

 cavity of this bone is well shown by its infilling, preserved on the 

 right side of the type-specimen. The fibula is very slender, though 



