426 Dr. P. P. Carpenter on new Forms of Mollusca 
radiatim vix ornata; epidermide levi, tenui, fugaci; costa pulmo- 
nali intus et extus valde conspicua, tumente; vertice obtuso, 
plerumque ad quadrantem, interdum ad trientem totius longitu- 
dinis sito ; intus intense nigro-fusco, margine acuto. Long. -46, 
late "Sa altecd ss 
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 typicze simili, sed jugo fornicato, haud cari- 
nato; omnino rubida, sculptura multo minus expressa ; areis late- 
ralibus vix definitis; latera versus subgranulata; dorsum versus 
Iineis 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. vil., subplanatis ; 
suturis alte insculptis; superficie spire tota valide tuberculosa, 
seriebus tribus, alteris postea intercalantibus ; peripheria et basi 
rotundatis, carinatis ; carinis cire. vill., haud acutis, irregularibus, 
seabris, haud tuberculosis ; lacuna umbilicali vix conspicua ; aper- 
tura subrotundata; labro tenuissimo; labio obsoleto; columella 
arcuata. Long. 1°1, 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 intercalante ; interstitiis subsuturalibus, 
subleevibus, inter carinas obtuse decussatis ; lira peripherica de- 
finita, seepe in spira se monstrante ; basi valde rotundata ; lirulis 
basalibus cire. 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 jun. strigis angustis, 
creberrimis, fusco-purpureis penicillata, testa adulta maculis quo- 
que magnis nebulosa ; anfr. v., subquadratis; liris obtusis medianis 
