188 FAUNA ANTIQUA SIVALENSIS. 



No. 391. Equus Sivalensis. — Articulating head of right humerus very 

 perfect, but detached from the shaft. 



No. 676. Equus Sivalensis. — Mass of matrix containing calcaneum of 

 Equus Sivalensis with two vertebrae adhering. 



No. 696. Equus Sivalensis. — First cervical vertebra (atlas). A fine 

 specimen, nearly entire, and nearly of the same proportions as in the exist- 

 ing horse, but the body somewhat shorter ; the spinous tuberosity less 

 prominent, and the posterior inferior margin free from a hitch or eniai-gi- 

 nation. The specimen is only defective in the marginal expansion of 

 the transverse processes, where the edge is broken off. 



No. 697. Equus Sivalensis. — Fom-th cervical vertebra. Body nearly 

 entire, processes more or less mutilated. 



No. 698. Equus Sivalensis. — Fine specimen of the sixth cervical 

 vertebra. Body entire; neural arch broken off; inferior transverse 

 process on left side entire and very broad and massive, more so than 

 in the recent horse ; broken oiF on right side. 



No. 700. Equus Sivalensis. — Very fine specimen of the third 

 cervical vertebra ; the body nearly entire, and formed closely, as in the 

 existing horse, with the same broad expansion of the transverse processes 

 delated posteriorly ; the lips of both superior and inferior transverse 

 processes together with the neural arch broken off. The form generally 

 resembles that of the same bone in the ' Nyl Ghau ; ' but it is at once 

 distinguished fi-om the ruminant type by long and nearly concealed 

 vertebral foramina, the entrance of the artery being clcise to the margin 

 of the spinal canal. 



No. 701. Equus Sivalensis. — Seventh cervical vertebra. Body 

 nearly entire, neural arch present, but spinous process broken off; dis- 

 tinguished by the absence of a vertebral foramen ; a costal articulation 

 shown on one side of the posterior siu-face ; closely resembles the same 

 bone in the recent Eq . Cahullus. The anterior articulating surface broader. 



No. 7(>2. Equus Sivalensis. — Fiflh cervical vertebra. Body nearly 

 entire ; posterior articular surface having the lateral margin broken on 

 the left side ; neural arch present ; sjiinous axis styles broken off. Ver- 

 tebral canal with a very large oj^ening ; a good deal of matrix on the 

 specimen. 



No. 705. Equus Sivalensis. — Mutilated astragalus. 



No. 706. Equus Sivalensis. — Proximal phalanx, fore-leg, of small 

 size, nearly entire. 



B. From Perim Island. 



No. 34. Equus.- — Upper jaw, left side, containing the two anterior 

 premolars, well worn, corresponding in characters with Eq. Sivalensis, 

 Faun. Sival., PI. LXXXII. 



No. 35. Equus. — Astragalus, smaU size. 



No. 36. Equus. — Lower jaw, left side, containing the four anterior 

 molars, well worn ; trimcated in front and behind ; agrees with No. 3-1. 



No. 37. Equus. — Lower jaw, right side, containing the three anterior 

 molars, Avith portion of the diastema in front, and truncated behind. 



