ON MOLLUSCA OF THE WEST COAST OP NORTH AMERICA. 



647 



177 b. Tornatina cerealis, Gld. Otia. Small, white, smooth: but probably = worn 

 young culcitella. 



178. Tornatina eximia, Baird, P. Z. S. 1863, p. 67. Size moderate : fold appressed : 



subrectangular. 



179. Tornatina carinata, Maz. Cat. no. 223. 



180. Cylichna ?cylindracea, Linn. auct. Intermediate specimens, passing into 

 180b. Cylichna var. attonsa, rounded off at apex. 



181. Cylichna planata, n. s. Like mamillata, with apex flattened-offl and fold distinct, 



182. Cylichna inculta, Gld. Otia. 



183. Volvula cylindrica, n. s. Like grain of rice, pointed at one end. 



Family Aplysiades. 



184. Neaplysia Californica, Cp. Proc. Cal. Ac. 15 inches long. 



185. Navarchus inermis, Cp. Proc. Cal. Ac. Grasses, on shore. Cp. 



Family Pleurophyllidiadee. 



186. Pleurophyllidea Californica, Cp. Proc. Cal. Ac. Sandy flats, Cp. 



Order NUDIBRANCHIATA. 



137-198. All the new Nudibranchs are described in the Proc. Cal. Ac. Vide onto), 

 p. 609. Vide also Gld.'s Otia, and Esch. Zool. Atlas. 



Subclass PULMONATA. 



For land and freshwater species, both of Pulmonates, Rostrifers, and Bhfi'i7*r, 

 vide postea, paragraphs 115-119. 



Family Aurictdidce. 



199. Mflampus olivaceus , Cpr. Maz. Cat. no. 235. 



200. Pedipes liratus, Binn. Proc. Ac. N. S. Phil. 1861, p. 333, 



Family Siphonariadce. 



201. Siphonaria Tliei'sites, n. s. Like lateialisi with strong lung-rib and obsolete 



sculpture. 



133 



