32 Dr. P. P. Carpenter on new Forms of Mollusca. 



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. parpurece 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. *1 1, 

 div. 20°. 



Hab. Neeah Bay; common (Swan). 



51. Cerithiopsis columna. 



C. testa majore, valcle 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 peripberiam 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 impressis ; 

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

 prolongatam circ. 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 prolongata. 



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

 et dimidio, rapidissime augentibus ; vertice vix conspicuo ; anfr. 

 ult. antice valde porrecto ; regione columellari incurvata ; labio 

 valido ; axi haud rimata ; epidermide tenui, rugis incrementi or- 

 nata, spiraliter haud striata. Long. "1, long. spir. '15, lat. '95, 

 div. 140°. 



Hab. Neeah Bay; rare (Swan). 



