26 THE NAUTILUS. 



front, and reaching beyond the vertical of the beaks, anteriorly. In 

 general the shell is yellowish or bright pink, with occasional 

 brownish rays. It seems to be confined to the Antilles and the 

 southern Florida Keys. 

 Ervilia subcancellata Smith. 



Valves much compressed, both ends somewhat attenuated, the 

 base arcuate and prominent in the middle ; the surface concentric- 

 ally striated and covered with fine, distinct, radial strife ; the pallial 

 sinus reaching to the vertical of the beaks, rather wide, anteriorly 

 rounded; shell solid, hinge moderately strong; Ion. 8; alt. 5'5 ; 

 diam. 3 mm. 



This species is differently shaped, rather more compressed and 

 with a different hinge and pallial sinus from the E. ititens. The 

 specimens I have seen are white or brownish and were obtained at 

 Bermuda by Dr. Goode. 

 Ervilia concentrica Gould. 



Shell solid, plump, with a robust hinge ; the surface with strong, 

 even, concentric riblets and narrower, even grooves between them ; 

 there are few very faint or no radial strire ; the posterior end is 

 slightly the longer and more attenuated, the anterior shorter and 

 higher; pallial sinus narrow, almost angular in front, just reaching 

 the vertical of the beaks ; the color is generally white, rarely pink- 

 ish or yellowish. 



This species is common in moderate depths from Cape Hatteras to 

 Key West and Peusacola, Florida. It is smaller and more lozenge 

 shaped than E. nitens. Several specimens from the Mediterranean 

 are in the Jeffreys collection under the name of the young of E. 

 castanea or E. nitens. It is represented in the Postpliocene of North 

 Creek, Little Sarasota Bay, Florida, by a variety less strongly >tii- 

 ated and which seems to form the transition to the Pliocene species. 

 Ervilia maculosa Dall, n. s. 



Shell almost perfectly oval, very thin, compressed, and almost 

 translucent ; closely, sharply, finely, concentrically striated without 

 radial stria; ; posterior end higher, rounded, longer than the ante- 

 rior; beaks low and calyculate; hinge very feeble; pallial sinus 

 wide and rounded, falling short of the vertical of the beaks ante- 

 riorly ; surface mottled with brown streaks and patches on a trans- 

 lucent ground. Lon. 4'5 alt. 2'7 mm. 



This quite distinct form was obtained oft' Cape Lookout, N. Caro- 

 lina in 22 fathoms by the U. S. Fish Commission. It is recognizable 



