62 



of union, approximating, in some portion of its osseous structure, 

 even more to the former than to the latter. 



Mr. Martin added that it was his intention, with the view of ren- 

 dering his communication more complete, to review the osteology 

 of the Enhydra in detailed comparison with that of the common 

 Otter and of the Seal. 



A drawing was exlubited of a Saurian Reptile of the family Scin- 

 cidiB and of the genus Tiliąua, Gray, which forms part of the Museum 

 of the Army Medical Department at Chatham, and which is regard- 

 ed by Mr. Burton, Staff-Surgeon, in charge of the Museum, as 

 hitherto undeseribed. 



It \vas accompanied by the subjoined character and description by 

 Mr. Burton. 



TiLiauA Ferxandi. TU. auribus profundis, latis, margine antico 

 simplici ; squamis dorsalibus valde tri-carinatis : sttprci pallide 

 brunnea strigis saturatioribus ornata, infru albescens ; lateribus 

 brunneo variis alboque maculatis ; gula brunneo lineatd. 



Long. corporis capitisąne 6 unc; capitis colliąae, 2į ; caudce, ? 



Hab. apud Fernando Po. 



" There are eight rows of hexagonal imbricated scales on theback 

 and tail, and two additional rows betw'een the fore and hind legs ; 

 the lateral scales are irregular in form and size. Submental scales 

 large, in three transverse rows ; the first containing a single scale, the 

 second a pair, the third a pair \vith an intennediate rudimentary 

 one. Subcenical and ventral scales in eight rows ; subcaudal in 

 five roTV's, of wliich the middle row is the larger. There is a single 

 row of anai scales, curved upwards. Scales of the upper surface of 

 the body 3-keeled, of the lower smooth. A semicircular series of five 

 platės over each orbit separated by a long narrow frontai : five occi- 

 pital platės, the posterior ones largest : nasal, post-nasal, and labial 

 platės varied in form and size. 



" Head, back, tail and upper surface of the extremities reddish 

 bro\vn, a blackish line intersecting each row of scales ; sides lighter, 

 marked by a series of irregular blackish streaks ; belly and under 

 surface of tail a brownish white ; throat alternated longitudinaUy M'ith 

 light and dark-brown lines ; submental scales -o-hitish, bordered ■vvith 

 a broad dark-brown edge. 



" A single ro\v of blunt teeth on the margin of the jaws. 



" Body of nearly uniform shape from the commissiu-e of the lips 

 to the tail." 



