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



radiatim vix ornata; epidermide laevl, tenui, fugaci; costa pulmo- 

 nali intus et extus valde conspicua, tumente ; vertice obtuso, 

 plerumque ad quadrantem, interdum ad trientem totiiis longitu- 

 diiiis sito ; intus intense nigro-fusco, margins acuto. Long. ■-!(), 

 lat. -33, alt. -17. 

 Hab. Neeah Bay (Swan). 



This genus, which culminates in western tropical America and 

 at Cape Horn, is not known in California, The Vancouver spe- 

 cies resembles S. lateralis and its congeners, but differs jn having 

 an enormous lung-rib and no colour-rays. 



16. Mopalia {Kennerleyi, var.) Swannii. 



M. testa M. Kennerleyi typicae simili, sed jugo fornicato, liaud cari- 

 nato ; omnino rubida, sculptura mult -i minus expressa ; areis late- 

 ralibus vix definitis ; latera versus subgranulata ; dorsum versus 

 lineis jugum versus procedentibus, interstitiis punctatis ; sinu 

 postico latiore ; limbo pallii lato, coriaceo, vix piluloso. Long. 

 2-4, lat. 1-, div. 120°. 



Hab. Tatooche Island (Swan). 



23. Margarita Cidaris, A. Ad. 



M. testa magna, conica, Turcicoidea, tenui ; albido-cinerea, nacreo- 

 argentato; aufr. nucleosis?...(decollatis), norm, vii., subplanatis ; 

 suturis alte insculptis ; superficie spirse tota valide tuberculosa, 

 seriebus tribus, alteris postea interealantilms ; peripheria et basi 

 rotundatis, carinatis ; carinis circ. viii., baud acutis, irregularibus, 

 scabris, baud tuberculosis ; lacuna umbilicali vix conspicuii ; aper- 

 tura subrotundata ; labro tenuissimo ; labio obsoleto ; columella 

 arcuata. Long. I'l, long. spir. '65, lat. '75, div. 60°. 

 Hab. Neeah Bay [Swan). 



Mr. A. Adams suggested the above expressive name for this 

 very remarkable and unique shell. 



25. Gibbula parcipicta. 



G. testa solidiore, parva, conica, pallida, purpureo-fusco varie nebu- 

 losa et maculata ; anfr. v., rotundatis ; carinis ii. validis in spira 

 se monstrantibas, minnre intercalante ; interstitiis subsuturalibus, 

 subla?vibus, inter carinas obtuse decussatis ; lira peripherica de- 

 fmita, sEepe in spira se monstrante ; basi valde rotundata ; lirulis 

 basalibus circ. v. rotundatis, subdistantibus ; apertura subcirculari; 

 columella arcuata ; umbilico majore, infundibulifbrmi, baud atigu- 

 lato. Long. -14, long. spir. '07, lat. "13, div. 70°. 

 Hab. Neeah Bay [Swan); Santa Crux (Rowell). 



26. Gibbula succinda. 



G. testa parva, subelevata, solidiore; livida, testa jun. strigis angustig, 

 creberriniis, fusco-purpureis penicillata, testa adulta maculis quo- 

 quemagnis nebulosa ; anfr. v., subquadratis; liris obtusis medianis 



238 



