from the Vancouver District. li 



obsoletis, ad peripheriam evanidis ; circa basim totam usque ad 

 Deripheriam angulatam lamina spirali, planata ; apertura ovali ; 

 iota superficie rninutissime spiral iter striolata : operculo pauci- 

 bpirali, nucleo ad trientem longitudinis sito, lineis mcrememi va- 

 lidis. Long. !/, long. spir. 1-3, lat. '53, div. 20. 



Hab. Puget Sound (U. S. Expl. Exp.)- y Neeah Bay and Ta~ 

 tooche Island (Swan). 



This species was doubtfully indicated, not described, by Dr. 

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

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

 related to Ochotensis, Midd. It must not be confounded with 

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

 0. australis. 



50. Cerithiopsis munita 



C. testa C. purpurece simili, sed angustiore, marginibus spirse fere 

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

 losis; basi sequaliter lirulata. Long. '34, long. spir. '24, lat. -11, 

 div. 20. 

 Hab. 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 intercalantibus ; lira quarta supra suturam baud valde 

 nodulosa, liris duabus baud expressis aream suturalem cir- 

 cumeuntibus ; basi planata, baud sculpta, ad peripheriam obtuse 

 angulata; apertura quadrata. Long. '38, long. spir. 32, lat. !, 

 div. 10. 

 Hab. Neeah Bay; several worn specimens (Swan) : Monterey; 



rolled fragment of larger shell (Cooper). 



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



pattern. 



55. Cancellaria modesta. 



C. testa elata, subrufa, trichotropiformi, marginibus spirse rectis ; 

 anfr. norm, v., rotundatis, postice subtabulatis, suturis irnpressis ; 

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

 prolongatam cire. vii., aliis minoribus interdum intercalantibus; 

 interstitiis secundum incrementa, decussatis; apertura sub- 

 quadrata; columella plicis duabus declivibus anticis et costulis 

 basalibus ornata; labio nullo. Long. -68, long. spir. -34, lat. 34, 

 div. 50. 

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



56. Velutina prolong ata. 



V. testa majore, subplanata, tenuiore, carnea, spira minima ; anfr. iii. 



245 



