from the Vancouver District. 13 



oT)So!etis, ad pcriplicriam evanidis ; circa basini totam ii«que ad 

 Deriiiheriam aiigiilatiin lamina sj)irali, planata; apertura ovali ; 

 lota supcrficie miiiutissime spiraliter striolata : operculo jiaiici- 

 spirali, nueleo ad trit-iitem longitudiiiis sito, lineis incremeuii Ta- 

 lidis. Long. TT, long. spir. 1-3, lat. \)'^, div. 20°. 



ITdh. Paget Sound {U. S. Expl. Exp.)-, Neeali Bay and Ta- 

 tooche Island (Sivan). 



This species was donl)tfiillv indinted, not described, by Dr. 

 Gould, in the * E. E. Moll.' p. 207. It appears to be exactly iden- 

 tical with " crassicosfafa, Australia," in Brit. Mus,, and is nearly 

 related to Oc/iofensis, Midd. It must not be confounded with 

 Acirsa borealis, Beck. One young specimen has the ten ribs of 

 O. australis, 



50. Cerithiopsis munita 



C. testa C. pvrpnretB siniili, sed angustiore, marginibus spirse fere 

 rectis ; costis spiralibus magis expressis, testa adulta minus nodu- 

 Josis ; basi a;(pialiter lirulata. Long. '34, long. spir. '24, lat. '11, 

 div. 20°. 



Hub. Neeah Bay; common [Swan). 



51. Cerithiopsis columna. 



C. testa majore, valde elongata, purpureo-fusca ; anfr. norm, ix., 

 planatis, suturis distinctis ; seriebus iii. nodulorum spiralibus 

 valde appressorum, creberrimorum, interstitiis parvis, altis ; aliis 

 interdum intercalanlibus ; lira qiiarta supra suturam baud valde 

 nodulosa, liris duabus baud expressis aream snturalem cir- 

 cumeuntibus ; basi planata, baud sculpta, ad peripberiam obtuse 

 angulata ; apertura quadrata. Long. '3^, long. spir. 32, lat. "l, 

 div. 10°. 

 Hub. Neeah Bay ; several worn specimens {Swan) : Monterey; 



rolled fragment of larger shell [Cooper). 



Easily recognized, even in portions, by the "struag-fig" 



pattern. 



55. Cancellaria modesta. 



C. testa elata, subrufa, tricbotropiformi, marginibus spirop rectis; 

 anfr. norm, v., rotundatis, j)ostiee subtabulatis, suturis impressis ; 

 costis spiralibus obtusis, distantibus, in spira circ. iv., circa basim 

 prolongatam circ. vii., aliis minoribus interdum interealantibus ; 

 interstitiis secundum incrcnunta, decussatis; apertura sub- 

 quadrata; columella plicis duabus declivibus anticis et costulis 

 basalibus ornata; labio nullo. Long. 08, long. spir. -34, lat. 34, 

 div. 50°. 



Hab. Neeah Bay; one specimen and fragment {Swan). 



56. Velutina prolongata. 



F. testa majore, subplanata, temiiore, caraea, sjtira minima ; anfr. iii, 



245 



