from the Vancouver District. 7 



35. Isopis fenestrata. 



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

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

 cinne qnadratim decussatis, liiulis radiantibus acutissimis ; anfr. 

 postice tunientibus, suturis valde excavatis ; peritremate contmuo; 

 labro a carinis pestinato ; labio parietein parum attingente, medio 

 calloso ; umbilico angusto. Long. -18, long. spir. "IS, lat. '19, 

 div. 70°. 



Hub. Neeah Bay {Swan) ; S. Diego and Sta. Barbara Island 



(Cooper). 



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

 Vancouver district, which ai'c 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), etlirulis radiantibus, sujira transeuntibus, baud nodulosis, 

 secundum iuterstitia incurvatis, eleganter exsculpta ; interstitiis 

 altis, quadratis ; peritremate continuo, 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. reticulatee indole et colore, hand sculptura, simili ; multo 

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

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

 rugulis radiantibus posticis creberrimis, baud 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 suhrotiindata. 



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

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

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

 cata ; apertura rotundato-ovali, intns fuscescente ; peritremate 

 continuo ; labro acuto ; labio parum calloso \ columella arcr.i;ia. 

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



Hab. Neeah Bay; one specimen among Lacuna {Swan). 



May prove to be a large Hijdrobia. 



39. "iPaludinella costnnca. 

 IP. testa compacta, solidiore, fusco-castauea, margiujbns vpirse rec- 

 16 241 



