GASTEROPODA. Ill 



ORDER PROSOBRANCHIATA. 



No. 255. Murex caticulata, Broc. 



. The Muricida? comineuce in the Mesozoic, and characterize the Tertiary and 

 recent time. There are 160 fossil species and 200 living. Pliocene, Fosetta, 

 Italy. 



No. 256. Fusus longaevus, Lam. 



300 species of the genus are known since the Cretaceous, and 65 now living 

 in the tropics, or subtropics. The genus is the type of the family Fusidte. 

 Eocene, Grignon, France. 



No. 257. Fusus antiquus, Muller. 

 (Contrarius, Sow.) 



An interesting reversed form, and a very characteristic 

 shell of the Red Crag (Pliocene Tertiary), Walton, England. 



No. 258. Fusus antiquus, Muller. 



(Contrarius, Sow.) 



Quaternary, Palermo, Sicily. 



No. 259. Buccinum stromboid.es, Lam. 



The family Buccinidse, with the Muricidae, is characteristic of the Tertiary 

 and recent time. Eocene, Grignon, France. 



No. 260. Pisania plicata, Broc. 



The subfamily Pisaniin* to which the genus belongs is included in the 

 family Buccinidse. Pliocene, Modena, Italy. 



No, 261. Nassa senilis. 



This genus is the type of family Nassid*. It dates from the Eocene. 

 These specimens are from the Miocene, Montegibia. 



No. 262. Nassa limata, Chemn. 

 Pliocene, Modena, Italy. 



No. 263. Voluta cithara. Lam. 



250 fossil species of this type genus of the family Volutidae are known 

 from the Cretaceous and later strata. The genus exists in the tropics to-day. 

 Eocene, Grignon, France. 



No. 264. Oliva Greenoughii, Lea. 



This genus dates only from the Eocene. It is the type of the family Olividae. 

 Eocene, Claiborne, Alabama. 



No. 265. Columbella nassoid.es. Bell. 



A large and varied genus in present seas, and represented in the Tertiary. 

 Family Columbellidae. Miocene, Baden. 



