from the Vancouver District. 7 



35 . Isopis fenestrata . 



I. testa I. ovoidece forma et indole simili ; carinis ix. acutis (quarum 

 iv.-in spira monstrantur) cincta ; interstitiis duplo latioribus, con- 

 cinne quadratim decussatis, liiulis radiantibus acutissimis ; anfr. 

 postice tumentibus, suturis valde excavatis ; peritremate continue ; 

 labro a carinis pe&tinato ; labio parietern parum attingente, medio 

 calloso ; umbilico angusto. Long. *18, long. spir. '13, lat. "19, 

 div. 70. 



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

 (Cooper). 



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

 Vancouver district, which are white and eroded, varying much 

 in the size of the umbilicus. 



36. Alvania reticulata. 



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

 imcleosis ii. et dimidio, naticoideis, laevibus, 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, hand nodulosis, 

 secundum interstitia incurvatis, eleganter exsculpta ; interstitiis 

 altis, quadratis ; peritremate continue, subrotundato, acutiore. 

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



Hab. Neeah Bay; two specimens in shell-washings (Swan). 



37. Alvania flosa. 



A. testa A. reticulates indole et colore, haud sculptura, simili ; multo 

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

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

 rugulis radiantibus posticis creberrimis, haud expressis, circa peri- 

 pheriam evanidis ; peritremate continue ; columella rufo-purpureo 

 tincta. Long. '13, long. spir. '09, lat. '06, div. 20. 



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



38. ?Assiminea subrotundata. 



1A. testa haud parva, Isevi, tenui, fusco-olivacea ; anfr. nucl. ?...(fle- 

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

 spiree rectis, suturis valde impressis ; basi rotundata, haud umbili- 

 cata ; apertura rotundato-ovali, intus fuscescente ; peritremate 

 continuo; labro acute; labio parum calloso; columella arcr.e..'u. 

 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. tPaludinella casianca. 



?P. testa compacta, solidiore, fu.scu-cciatauen, niargiuibns :D\TK rec- 

 16 '241 



