106 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



the North Atlantic, lie anticipates the discovery, " from the 

 greater depth of the ocean, of representatives resembling 

 those types of animals which were prominent in earlier geo- 

 logical periods, or bear a closer resemblance to younger stages 

 of the higher members of the same types, or to the lower 

 forms which take their place nowadays." 



' Making no suggestion in regard to mammals, he remarks 

 that if reptiles exist in the deep waters, they must be only 

 such as are related to the extinct types of the Jurassic pe- 

 riods, such as the ichthyosauri, plesiosauri, and pterodactyles; 

 but even of these he thinks there is very little probability 

 that any representatives are still alive. 



Among the fishes he expects to discover some marine rep- 

 resentatives of the order of ganoids of the principal types 

 known from the secondary zoological period. Among the 

 sharks he thinks he shall find new forms allied to Cestracion, 

 or Hybodon, or Odontaspis, as also new genera of chinise- 

 roids; and among ordinary fishes the allies of Beryx, Elops, 

 etc. It is among the mollusks and radiates that objects of 

 the greatest interest will probably be met with ; and chief 

 among these will be nautiloid cephalopods-^perhaps even am- 

 monites and forms only known hitherto in the fossil state. 

 Among Acephala he anticipates the discovery of a variety 

 of forms resembling: those from the Jurassic and cretaceous 

 deposits in great variety, while Rudistes will take the place 

 of oysters, and brachiopods be found very abundant. 



Among Crustacea it is not at all impossible that forms may 

 be found resembling trilobites ; while among Echinoderms 

 he confidently expects to meet with spatangoids approaching 

 Holaster, and others akin to Dysaster, etc. 



A careful comparison of the members of the deep-sea fauna 

 of the northern and southern hemispheres will probably prove 

 of the greatest interest, and, judging from the peculiarities of 

 the land and shore fauna of Australia, it is likely that the ad- 

 jacent deep-sea animals will be equally divergent, and repre- 

 sent remarkable forms, and especially of an extremely an- 

 tique type. 



The professor also hopes that much light will be thrown 

 upon the subject of the geology of the southern hemisphere, 

 and upon the general features of the drift, since all the phe- 

 nomena related to the glacial period must be found in the 



