{659] INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 365 
middle, the cost vanishing at the angulation ; the base is covered with 
numerous microscopic revolving lines ; on the body-whorl there are two 
revolving hands of pale brown, one above and one below the angulation. 
Aperture long ovate, acute posteriorly, alittle angulated on the outer side, 
rounded and slightly prolonged anteriorly. Outer lip thin and sharp, 
round and slightly effuse anteriorly ; columella smooth, nearly straight, 
but scarcely forming an angle where it joins the outer lip. Lengtb, 
4™™; breadth, 1.5™™, 
Somewhat resembles 7. interrupta, but the cost are more crowded, 
the spiral lines are very much finer and more numerous, and the 
nuclear-whorl is much larger. 
Long Island Sound, near New Haven, Conn. 
TURBONILLA STRICTA Verrill, sp. nov. 
Shell white, subulate, very acute, with a very minute reversed apical 
whorl; ‘whorls teu, besides the nucleus, gradually and regularly enlarg- 
ing, flattened or only very slightly convex, crossed by straight, obtuse, 
transverse cost, of which there are about sixteen or eighteen on the 
lower whorls; the two upper whorls are nearly smooth; suture im- 
pressed. Aperture irregularly oblong-ovate, acute posteriorly, rounded 
anteriorly ; outer lip flattened, thickened internally, in mature shells, 
and minutely crenulate within; columella smooth, nearly straight, 
thickened, forming an angle where it joins the outer lip. Length, 4.5™™ ; 
breadth, 1™™. 
Long Island Sound, off New Haven, Connecticut. 
This is probably the shell recorded from this region as T. nivea (Stimp. 
son, sp.) by Dr. G. H. Perkins. It differs from the nivea in the form of 
the aperture and lip, and in being smaller and much more acute, though 
having the same number of whorls. 
TURBONILLA EQUALIS Verrill. 
Turritella equalis Say, Journal Acad. Nat. Sciences, vol. v, p. 208, 1826; Bin- 
ney’s Say, p. 119. 
“Shell subulate, white; volutions ten, each with about twenty-two, 
transverse, elevated, obtuse, equal lines, with interstitial grooves of 
the same diameter; suture distinct, impressed; aperture rounded at 
base, and destitute of any distinct emargination. Length one-fifth of 
an inch.” (Say.) 
My spécimens agree well with the above description. The shell is 
very slender and acute, with a small distinctly reversed apical whorl ; the 
remaining nine whorls are somewhat flattened, and all are crossed by 
obtuse, transverse coste, which are a little oblique, especially at the 
upper ends, close to the sutures; on the body-whorl there are about 
twenty, but fewer on the upper ones; at the base of the body-whorl 
they vanish, leaving it smooth; the interstices between the coste# are 
deep and apparently smooth. The aperture is round ovate, well rounded 
or sub-circular anteriorly; the inner lip having a raised and thin 
