Bihliograpliical Notices. 159 



EXPLANATION OF PLATE V. 



Proteleia Sollasi, 



Fig.l. Vertical section tliroiigli surface. x44. a, a, primary skeleton- 

 fibres; h, outer layer of cortex; c, inner layer of cortex; f/, 

 grapnel-spicules ; e, accumulation of foreign matter on the 

 surface. 



Fig. 2. Transverse section of mammiform process. X 12. w, sections 

 of skeleton-fibres ; b, outer layer of cortex ; c, inner layer of 

 cortex. 



Fig. 3. Large acuate skeleton-spicule. X 120. 



Fig. 3 a. Smaller acuate skeleton-spicule. X 190. 



Figs. 4, 4 a. Large, stout, spinulate skeleton-spicules. X 190. 



Figs. 5, 5 a. Small, slender skeleton-spicules. X 190. 



Fi(/. 6. Grapnel-spicule. X 190. 



Fig. 6 a. Grapnel-spicule, with terminal expansion, but no teeth. X 190. 



Fig. 6 h. End of one of the grapnel-spicules. X 500. 



BIBLIOGRAPHICAL NOTICES. 



Memoirs of the Geological Survey of India. PaJceontologia Indica, 

 being Figures and Descriptions of the Organic Remains ■procured 

 during the Progress of the Geologiccd Survey of India. Published 

 by Order of His Excellency the Governor-General of India in 

 Council. Ser. x. Indian Tertiary and Post-Tertiary Vertehrata, 

 Vol. III. Parts 7 and 8. Siiualik Grocodilia, Lacertilia, and 

 Ophidia ; and Tertiary Fishes. By E,. Lydekker, B.A., F.G.S., 

 &c. With 10 plates (xxviii.-xxxvii.) Calcutta : Geological 

 Survey Office. London : Trlibner & Co. 1886. 



The Crocodilian fauna of tlie Siwalik rocks is closely allied to the 

 existing Indian types, but is remarkable for the great development 

 of Gharials, two of which were animals of larger size than any living 

 representatives of the group. The descriptions commence with a 

 short account of the characters of fossil allies of living crocodiles, 

 which have been described from Tertiary and Cretaceous strata. 

 Three recent Asiatic species of the genus Grocodilus are known and 

 two fossil forms are now described. G. sivalensis is well known 

 from crania and other remains, extending from the Punjab through 

 the Siwalik hills to Burma. It is closely allied to G. palustris, and 

 differs in the greater width of the interorbital bar, in the more 

 backward position of the anterior nares, the rougher sculpturing of 

 the premaxillary bone, and some other characters ; but the author 

 observes that the variety of G. j^cdustris from Ceylon approximates 

 nearer in some respects to the fossil than to the other Indian forms, 

 and hence the Siwalik species is regarded as the ancestor of its 

 existing ally. It is not without interest that the G. Ilastin'isicti of 

 the Headon beds closely resembles the crocodiles of the G. palustris 



