225 



catis; ultimo fusco-zonaio ; sutura bene impressa ; apertura 

 rotundato-ovata, antice vix producta ; fiiuce subviolaceo. Long. 

 ^, lat. ^ poll. Hah. Nisqually, Oregon. 



Very much like the preceding, but considerably smaller, more 

 cylindrical, ibe whorls more plaited, and a band on the basal one. 

 It resembles M. j^^oxima, Say, which is less cylindrical and with- 

 out folds. 



Melania bulbosa. Testa parva, conico-oblonga, nitida, de- 

 coUata, fusco-viridis : spira anfr. superstitibus 2-3 rotundis ; sutu- 

 ra profunda : apertura ovato-rotundata, vix effusa. Long. 4-, 

 lat. ^Q poll. Hab. Columbia River. 



The whorls are very cylindrical, so as to appear like a succes- 

 sion of bulbs. It is much like M. perfusca, Anthony ; but in that 

 the whorls slope gently to the suture. A broken specimen shows 

 that it often attains a considerable size. 



Melania fuefurosa. Testa turrita, ovato-pyramidata, tenuis, 

 scabriuscula, dilute fulva, et prope suturam fusco maculata, striis 

 arcuatis incrernentalibus et striis volventibus tenuissimis decus- 

 sata : spira Integra, anfr. 7 rotundatis, confertis, superne sub-ta- 

 bulatis ; ultimo magno, ventricoso ; supernis oblique plicatis: 

 apertura lunata, ad columellam effusa. Long. |-, lat. ^ poll. 

 Hab. Manila. 



Allied to M. scabra, which is more elongated, and its whorls 

 much less cylindrical, its striae coarse and distant, and crowned 

 with spino-tubercles. 



Melanopsis Zelandica. Testa solida, ovato-conica, nitida, 

 olivacea, fusco-trifasciata : spira conica, brevis, acuta ; anfr. 3, 

 supernis planulatis et ad suturam confluentibus ; ultimo magno, 

 postice planulato, antice ventricoso : apertura elliptica, coerules- 

 cens, rufo-fasciata, postice in canalem obducta; labro acuto : 

 columella valde arcuata et excavata, postice callo tuberculoso 

 copioso instructa. Long, -f-^^ lat. ^^ poll. - Hab. New Zealand. 



Compared with M. prxrosa., Lin., it is more plump, has but 

 3 instead of 6 or 7 whorls, the aperture proportionally longer : 

 the columella remarkably arched ; and the surface and aperture 

 are banded with dark chestnut. 



PROCEEDINGS B. S. N. H. 20 JULY, 1847. 



