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



radiatim vix ornata; epidermide Inevi, tenui, fugaci; costa pulino- 

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

 plerumque ad quadrantem, interdurn ad trientern totius longitu- 

 dinis sito ; intus intense nigro-fusco, margine acuto. Long. '40, 

 lat. -33, alt. - 1 /. 



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 in having 

 an enormous lung-rib and no colour-rays. 



16. Mopalia (Kennerleyi, var.) Swannii. 



M. testa M. Kennerleyi typicse simili, sed jugo fornicato, haud cari- 

 nato ; omnino rubida, sculptura mult > 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; anfr. nucleosis?...(decollatis), norm, vii., subplanatis j 

 suturis alte insculptis ; superficie spirse tota valide tuberculosa, 

 seriebus tribus, alteris postea intercalantibus ; peripheria et basi 

 TOtundatis, carinatis ; carinis circ. viii., haud acutis, irregularibus, 

 scabris, haud tuberculosis ; lacuna umbilicali vix conspicua ; aper- 

 tura subrotundata ; labro tenuissimo ; labio obsolete ; columella 

 arcuata. Long. Tl, 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 monstrantibus, minore intercalate ; interstitiis subsuturalibus, 

 subleevibus, inter carinas obtuse decussatis ; lira peripherica de- 

 finita, saepe in spira se monstrante ; basi valde rotundata ; lirulis 

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

 columella arcuata ; umbilico majore, infundibuliformi, haud angu- 

 lato. Long. '14, long. spir. *07, lat. *13, div. 70. 

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



26. Gibbula succincta. 



G. testa parva, subelevata, solidiore; livida, testa juri. strigis angustis, 

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

 que magnis nebulosa ; anfi'. v., subquadratisj liris obtusis medianis 



238 



