C Dr. P. P. Carpenter on new Forms of MolIusJcs 



niiiiimis; intus alba, castaneo et iiijiro varie maculata ; margiiie 

 latiorc, nigro tessellato. Long. 1'3, lat. I'O, alt. '5 poll. 

 Variat margine nigro-punctato, piuictis plerumque bifidis. Variat 

 qiuxpie costis j)arvis, creberrimis ; margine nigro. 



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

 Ileeve. 



17. Acmcpa strigatdla. 



A- testa A. mesoleucce simili, scd minore, baud viridi ; striolis mini- 

 mis, confertissimis, plerumque erosis tenuissime sculpta ; albida, 

 strigis olivaceo-fuscis, plerumque radiantibus, interdum conflueri- 

 tibus picta ; apice sa'pius nigro ; intus albida, margine satis lato, 

 strigis tessellato. Long. '9, lat. "7-1, alt. '3 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. canthnrus, but the very delicate crowded striae well distin- 

 guish It when not abraded. 



1 8. Ghjphis saturnalis, 



C. testa C ina-qvali simili, sed minore, latiore, altiore, tenuissime 

 cancellata; striis radiantibus plus minusve proj)inquis, plus mi- 

 nusve nodulosis ; fissura prope trientem longitudinis sita, minima, 

 linear!, medio lobata ; intus callositate albida, truucata. Long. '38, 

 lat. ^-I, alt. -18 j)oll. 



The minute hole resembles the telescopic appearance of Satura 

 wben the rin":s are reduced to a line. 



'D • 



Subgenus Eucosmi.\*. 



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

 rotundati : conspic\ie umbilicata : pcritrema vix continuum, hand 

 callosum. 



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

 forated Phasianella. The animal and operculum of the Cape 

 St. Lucas s))ecies are unknown. The Phosianella striulata, ilaz. 

 Cat. no. 283 b { = Twh(, phadanella, C. li. Ad. Pan. Sh. no. 282), 

 and even \\\q Lunatia tenuUhuta, Maz. Cat. no. 572, are perhaps 

 congeneric. 



19. Eticosmia varipgata. 



E, testa parva, laevi, tnrbinoidoa, nitentc, marginibus spiroe valde 

 excurvatis ; rosnceo et rufo-fnsco varie maculata ; anfr. uucleosis 

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

 rapide augentibus, suturi? im|ircs!iis ; anfV. ultimo antioe prodncte; 

 oasi rotundata ; urnbilico carinato ; apertuia vix a pancte indfu- 



* Th. fv, well .; Kocr/iia, adorned. 



214 



