1882.1 'lightning' AND 'porcupine' EXPEDITIONS. 681 



Summary of the foregoing List. 

 Class SOLENOCONCHIA. 

 Families. Genera. No. of species. 

 DENTALIID.E Dentalium 12 



SiPHODENTALIUM .... 5 



Dischides 1 



Cadulus 9 



Class GASTROPODA. 



CHITONIDiE Chiton 10 



PATELLID^ Patella 1 



Helcion 1 



Tectura 6 



Addisonia 1 



Propilidium 4 



FISSURELLID^ Fissurisepta 3 



Puncturella 3 



Fissurella 3 



Emarginula 8 



CALYPTRiEIDiE Calyptr^ea 1 



Cbepidula 1 



Total 69 



In order to make this work as complete as possible up to the 

 present time, I will add a few notes, chiefly with regard to distribu- 

 tion, which have occurred to me since the publication of the last 

 Supplement. These addenda and corrigenda seem to be endless ; 

 but in the continual progress of science they are unavoidable. 



Through the obliging courtesy of Professor Verrill I have now been 

 enabled to examine examples of many of the species procured during 

 his long and careful exploration of the sea-bed adjoining the coasts 

 of New England at considerable depths, which have been lately 

 described or noticed by him in the ' Transactions of the Con- 

 necticut Academy.' The result of my comparison of these species 

 with European species from deep water is most interesting and im- 

 portant. Out of 35 species which Professor Verrill has thus kindly 

 sent me, I consider 29 or 30 identical with European species. It 

 shows the far more extensive range of marine Mollusca at certain 

 depths than of land and freshwater Mollusca over any territorial 

 area of equal space. 



Supplement to Parts I., IT., III., IV. 



Part I., P. Z. S. 1878:— 



Page 399. Terebratulacaput-serpenfis. Fossil. Miocene : Marne 

 Vaticano {Ponzi). 

 „ 402. Teredratula tuheruta. Bay of Biscay (' Travailleur ' 

 Exp., 1881); 1093 fms. 



