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



iT.inhnis ; intus alba, castaneo et nigro varie maculata ; margiiie 

 latiore, nigro tessellato. Long. 1*3, lat. I'O, alt. "5 poll. 

 Variat margine nigro-punctato, punctis plerumque bifidis. Variat 

 quoque costis parvis, creberrimis ; margine nigro. 



Intermediate between "P. discors," Phil., and '' P Jloccata,^* 

 Heeve. 



17. Acmcea strigatella. 



A- testa A. mesoIeuccB simili, sed minore, baud viridi ; striolis mini- 

 mis, confertissimis, plerumque erosis tenuissime sculpta ; albida, 

 strigis olivaceo-fuscis, plerumque radiantibus, interdum confluen- 

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

 stngis tessellato. Long. -9, lat. -74, alt. 'S poll. 



Variat colore hie et illic 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. mesuleuca. The dark variety resembles 

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

 guish it when not abraded. 



1 8. Glyphis saturnalis. 



G. testa G. ineeqiiali simili, sed minore, latiore, altiore, tenuissime 

 cancellata ; striis radiantibus plus minusve propinquis, plus mi- 

 nusve nodulosis ; fissura prope tiientem longitudinis sita, minima, 

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

 lat. -2^, alt. -IS poll. 



The minute hole resembles the telescopic appearance of Saturn 

 when the rings are reduced to a line. 



Subgenus Eucosmia*. 



Testa solida, nitida, variegata, baud nacrea : apertura et anfractug 

 rotundati : conspicue umbilicata: peritrema vix continuum, baud 

 callosum. 



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

 forated P/iasianella. The animal and operculum of the Cape 

 St. Lucas species are unknown. The Phasianella striulata, i\Iaz. 

 Cat. no. 283 b i = Turlw phasianella, C. B. Ad. Pan. Sh. no. 282), 

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

 congeneric. 



19. Kucosmia variegata. f 



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

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

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

 rapide augentibns, suturi* impiossis ; anfr. ultimo antice prodnotc; 

 oasi rotundata ; umbilico cuiinato ; apertura vix a pariete indeu- 



* Th. (v, well; Koa-fiUi, adorned. 



214 



