from the Vancouver District, 7 



35. -Isapis feiiestrata. 



I. testa I. ovoidece forma et indole siinili ; carinis ix. acutis (eiuarum 

 iv. in spira inonstrantur) cincta ; interstitiis duple latioribiis, con- 

 cinne quadratim decussatis, liiulis radiantibus acutisslmis ; anfr. 

 postice tumentibus, suturis valde excavatis ; peritremate continuo ; 

 labro a carinis pestinato ; labio parietein parum attingente, medio 

 calloso ; umbilico angusto. Long. '18, long. spir. "13, lat. 'IQ, 

 div. 70°. 



Hab. Neeah Bay [Swan) ; S. Diego and Sta. Barbara Island 

 [Cooper). 



Dr. Cooper's shells are mucli smaller than those from the 

 Vancouver district, v.'hich are white and eroded, varying much 

 in the size of the umbilicus. 



36. Alvania reticulata. 



A. testa parva, subturrita, rufo-fusca, marginibus spirse rectis ; anfr. 

 nucleosis ii. et dimidio, naticoideis, Isevibus, tumentibus, apice 

 mamillato ; norm, iii., tumidis, suturis impressis ; liris angustis, 

 distantibus, spiralibus circ. xii. (quarum iv.-vi. in spira mon- 

 strantur), et lirulis radiantibus, supra transeuntibus, baud nodulosis, 

 secundum iuterstitia incurvatis, eleganter exsculpta ; interstitiis 

 altis, quadratis ; peritremate continuo, subrotundato, acutiore. 

 Long. -085, long. spir. -05, lat. -04, div. 30°. 



Hah. Neeah Bay; two specimens in shell-washings [Swari), 



37. Alvania filosa. 



A. testa A. reticulata indole et colore, baud sculptura, simili ; tnulto 

 majore, elongata ; anfr. nucl. ?... (detritis), norm. iv. ; striis parum 

 separatis circ. xviii. (quarum circ. xii. in spira monstrantur) cincta ; 

 rugulis radiantibus posticis creberrimis, hand expressis, circa peri- 

 pheriam evanidis ; peritremate continuo ; columella rufo-purpureo 

 tincta. Long. -13, long. spir. -09, lat. -OG, div. 20°. 



Hab. Neeah Bay; one specimen in shell-washings [Swan), 



38. ^Assiminea subrotundata. 



f.A. testa hand parva, Isevi, tenui, fusco-olivacea ; anfr. nucl. ?...(cle- 

 coilatis) ; norm, v., rapide augentibus, subrotundatis ; marginibus 

 spirae rectis, suturis valde impressis ; basi rotundata, baud umbili- 

 cata ; apertura rotundato-ovali, intus fuscescente ; peritremat,^ 

 continuo ; labro acuto ; labio parum calloso ; columella arcr.:..ii. 

 Long. -28. long. spir. -13, lat. -2, div. 65°. 

 Hab. Neeah Bay ; one specimen among Lacuna [Swan), 

 May prove to be a large Hydrobia. 



39. "iPalvdinella castnnea. 

 T. testa compacta, solidioie, fu.'.cu-casjtaueii, niargiuibus :piree rec- 

 16 241 



