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 strix ; the pallial 
sinus reaching to the vertical of the beaks, rather wide, anteriorly 
rounded; shell solid, hinge moderately strong; lon. 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. nitens. 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 striz; 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 Pensacola, 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 stri- 
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 strize; 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 off Cape Lookout, N. Caro- 
lina in 22 fathoms by the U. S. Fish Commission. It is recognizable 
