160 Bibliographical Notices. 



type in the suture between the maxillary and premaxillary bones. 

 Cvocodilus jialcehidicus of Falconer is known from the Siwaliks of 

 Perim Island in the Gulf of Cambay. Falconer recognized its 

 affinity to C. ixdustris, and the author points out characters in which 

 it differs from the species already described, especially in the trans- 

 verse character of the suture between the premaxillary and maxil- 

 lary bones and in the convexity of the facial profile. It has the 

 ninth tooth laige. In the facial sculpture the extremities of the 

 premaxillary bones are almost smooth, as in C. paJusiris ; the inter- 

 orbital bar is narrower than in C. siamensis. All living crocodiles 

 present considerable variation, in what might at first sight be sup- 

 posed to be specific characters, at different stages of growth ; and 

 the author would probably admit that many of our fossil species 

 may hereafter be modified as these facts in comparative anatomy 

 become recorded. 



Mr. Lydekker suggests that the ]N^orth-American Cretaceous genus 

 Holops should probably be included in the genus GTiarialis (Geof- 

 froy), and accordingly gives a provisional definition of this well- 

 known existing type, so as to include IJoloj^s. From the circum- 

 stance that the genus occurs in the Upper Cretaceous of France and 

 the Bi-acklcsham beds of this country, the author concludes that it 

 migrated eastward from Euro])e during the Tertiary period. The 

 Gharialis gangeticus is well represented as a fossil in the Siwalik 

 hills, in Burma, the Punjab, and Perim Island. At the present day 

 it is found in Bengal, the North-west Provinces, Akyab, and the 

 Indus basin. The species G. hysudricus was larger then G. gan- 

 ijeticiis, with which it closely agrees in palatal characters ; but the 

 width of the bar between the temporal fossae is much greater than 

 in the existing species, and it has the orbits closer together. The 

 remainder of the species are characterized by having pits in the 

 cranial rostrum for the majority of the teeth in the mandible. G. 

 carvirostris has but a slight expansion of the premaxilla?, and has 

 not the eversion of the orbits seen in existing species ; it is found 

 in the Lower Siwaliks of Sind. 



G. Jeptodas (Ftdconer and Cautley) is limited to the Siwalik hills 

 and Eastern Punjab. The fifth species, Gharialis pacliyrhynchus, 

 is known from the Lower Siwaliks of iSind. It is a very largo 

 species, which most resembles the G. cvrvirostris. Its premaxillary 

 teeth are larger than those in the maxillary bone. It is supposed 

 to have measured from 50 to 60 feet in length. A new genus, 

 Wiampliosuclms, is formed for some Gharial-like remains in which 

 the premaxillary bones are separated from the nasal bones, and do 

 not form an expanded end to the rostrum, while the splenial bones 

 make a considerable part of the mandibular symphysis. Falconer 

 alluded to this type as forming a passage fi'om the Gharials to the 

 true Crocodiles, and the type species is now described as 11. crassi- 

 dens. It is sx;pposed to have been about three times the size of the 

 existing Gangetic Gharial, but with a shorter rostrum. A dorsal 

 scute is upwards of 7 inches long by fully 4 inches wide. The 

 species is characterized by a pit in the cranium, which receives the 



