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



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

 latiore, nigro tessellato. Long. 1*3, lat. TO, alt. *5 poll. 

 Variat margine nigro-punctato, punctis plerumque bifidis. Variat 

 quoque costis parvis, creberrimis ; margine nigro. 



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

 Ileeve. 



17. Acm&a strigatella. 



A- testa A. mesoleucce simili, sed minore, baud viridi ; striolis miiii- 

 mis, confertissimis, plerumque erosis tenuissime sculpta ; albitui, 

 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 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. mesoleuca. The dark variety resembles 

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

 guish it when not abraded. 



18. Ghjphis saturnalis. 



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

 cancellata; striis radiantibus plus minusve propinquis, plus mi- 

 nusve nodulosis ; fissura prope trientem longitudinis sita, minima, 

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

 lat. -24, alt. -18 poll. 

 The minute hole resembles the telescopic appearance of Satum 



when the rings are reduced to a line. 



Subgenus EUCOSMIA*. 



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

 rotundati : conspieue umbilicata : peritrema 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 species are unknown. The Phasianella striulata, Maz. 

 Cat. no. 283 b ( = Turbo phasianella, C. B. Ad. Pan. Sh. no. 282), 

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

 congeneric. 



19. TZucosmia variegata. 



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

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

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

 rapide augentibus, sutnris impressis ; anfr. ultimo antice producto; 

 oasi rotuudata ; umbilico carinato ; apertura vix a pariete iuden- 



* Th. cv, well ; Kocrp.ia } adorned. 



214 



