244 



seems closely allied to Triton turr^icnlatus, Desh., but B. cAtharel- 

 lus is absolutely identical with Plesiotriton vohUella^ Lamarck 

 (Cancellaria). 



Of the large family Fusid;e, we liiid in Mr. Tate's work a first 

 tentative reform of the genus Fusus, in which the older authors, 

 and especially Deshayes, have classed the most heterogeneous 

 species ; F. i7icompositus, F. hulhodes, and F. Tateanus are 

 Clavelhv recognisable by their pullus and ornamentation ; 

 /''. tJiol aides and F. AJdingensis should constitute a new subgenus, 

 without analogy in the Paris basin, characterised by the tectiform 

 and costulated pullus ; the form and ornamentation of F. aciformis 

 and F. liexayonalis recall very much those of /'. fiiniculosiis, 

 Lamarck, which is the type of our new genus Latirofusus, it is 

 probable that F. aciformis is a synonym of the Parisian species. 



Siphonalia spatiosa has analogy with >S'. Marict^, Mellev., though 

 the canal is not so much curved ; Sij^ho styliformis and 

 ;S'. asperiilus appear to be doubtfully classed. 



The seven species of Pasciolaria are very characteristic, but 

 have no analogies in the Paris-Basin. Some of the species of 

 Peristernia should belong to Latirus ; P. actinostephes, which re- 

 sembles F. suhaffinis, D'Orb., belongs to our new subgenus Zrt^M'z^^zt*'. 



The five species of Pisania consists of a Latirus (/'*. jnirpuroides), 

 a Euthria (P. rostrata), and three of Tritonidea. 



Voluta sarissa is extremely allied to V. angustata, Desh., 

 V. lirata somewhat recalls V. Fredirici, Bayan, and 

 V. crassilabrum has some analogy with Septoscapha varicidosa, 

 Lamk., sp. Mitra Dennanti is irreconcilable with the typical 

 species ; M. alokiza is allied to 31. cup)ressina ; M. compJanata 

 and M. ligata have a resemblance to M. mixta ; among the 

 sj^ecies of Costellaria are some which it is impossible to separate 

 from Fusimitra, Conrad, such as M. hptaJea, M. paucicostata, 

 M. terehrwformis, whilst M. suhcrenidaris is very allied to 

 M. tetraptycta. 



Ancillaria orycta recalls completely AmaJda excarata, Coss- 

 mann. Harpa tenuis may be compared with Eocitliara inutica. 



Of the Cancellaria^, the following find places in some of the 

 subgenera recently established by M. Jousseaume : — 

 C. Wanyionensis is typical, C. cahulata and C. laticostata tO' 

 Bivetopsis ; C. gradata and C. p)tycliotropis to Bivetia ; 

 C. epidromiformis and C. exaltata to Sueltia ; C. modestina to 

 INIerica ; C. tttrricidata, C. Etlieridgei^ C. caper ata^ C. capiUata, 

 C. micra and perhaps C. semicostata to Narona. 



The Terebrje are for the most part related to those of our 

 supra-tertiary beds, not one of them resembles T. plicatuJay 

 Lamk., the only-known species in the Paris-Basin. 



Cassis exigua is allied to C. textiliosa. 



