G Dr. P. P. Carpenter on new Forms of Molluska 



mimmis; intus alba, castaneo et nigro varie maculata ; margine 



latiore, nigro tessellato. Long. 1-3, lat. 1-0, alt. "5 poll. 

 Variat margine nigro-punctato, punctis plerumque bifidis. Variat 



quoque costis pavvis, creberrimis ; margine nigro. 



Intermediate between "P. discors," Phil., and "P floccata," 

 Reeve. 



17. Acmaa strigatella. 



A. testa A. mesoleuca simili, sed minore, baud Tiridi ; striolis mini- 

 mis, confertissimis, plerumque erosis tenuissime sculpta ; albida, 

 strigis olivaceo-fuscis, plerumque radiantibus, interdum confluen- 

 tibus picta ; apice ssepius nigro ; intus albida, margine satis lato, 

 strigis tessellato. Long. '9, lat. '74, alt. '3 poll. 



Variat colore hie et illie aurantiaco tincto : strigis omnino tessellatis. 



According to Darwin, this might be regarded as a cross be- 

 tween the northern forms A.pelta and A. patina, about to change 

 into the Gulf species, A. mesoleuca. The dark variety resembles 

 A. cantharus, but the very delicate crowded striae well distin- 

 guish it when not abraded. 



1 8. GlypMs saturnalis. 



G. testa Q. incequali simili, sed minore, latiore, altiore, tenuissime 

 cancellata ; striis radiantibus plus minusve propinquis, plus mi- 

 nusve nodulosis ; fissura prope trientem longit\idinis sita, minima, 

 lineari, medio lobata ; intus callositate albida, truncata. Long. '38, 

 lat. -24, alt. -18 poll. 



The minute hole resembles the telescopic appearance of Satura 

 when the rings are reduced to a line. 



Subgenus Eucosmia*. 



Testa solida, nitida, vanegata, baud nacrea : apertura et anfractns 

 rotundati : conspicue umbilicata: peritrema vix continuum, baud 

 callosum. 



The shells here grouped are like small, round-mouthed, per- 

 forated Phasianellce. The animal and operculum of the Cape 

 St. Lucas species are unknown. The Pkasianella striulata, Maz. 

 Cat. no. 283 b { = Turbu pkasianella, C. B. Ad. Pan. Sh. no. 282), 

 and even the Lunatia tenuilirata, Maz. Cat. no. 572, are perhaps 

 congeneric. 



19. Eucosmia variegata. 



E. testa parva, Isevi, turbinoidea, nitente, marginibus spirse valde 

 excurvatis ; rosaceo et rufo-fusco varie maculata ; anfr. nucleosis 

 regularibus, vertice mamillato ; normalibus iv., valde tumentibus, 

 rapide augentibus, suturis imprcssis ; anfr. ultimo antice producto; 

 nasi rotuudata ; umbilico carinato ; apertura vix a pariete inden- 



* Th. 6u, well ; Koa-jxla, adorned. 



214 



