1869.1 115 fFerkins. 



Sycotypus Browne, 1846. 



Syeotypus eanaliculatus Gill, Am. Journ. Conch., Vol. in, 

 p. 147. Murex eanaliculatus Linn., Syst. Nat., 1222. Busy con 

 canaliculatum Stimps., Smith. Check List. Pyrula canaliculata Lam., 

 An. sans Vert., Vol. x, p. 504 ; Gould, Invert. Mass., p. 294, fig. 206 ; 

 De Kay, Moll. N. Y., p. 140, pi. ix, fig. 190. 



Common in the same localities as the preceding. It is not usually 

 large, varies in color from light buff to dark, livid purple, and is not 

 infrequently distorted; mantle white, edged with a narrow granulous 

 cord of bright yellow color; proboscis long, black at the tip, reddish 

 near the body, with a small fold just above the tip on one side; ten- 

 tacles short, triangular, usually the right is much the smaller; eye 

 spots on outer side about half way from the tips ; foot large, ovate ; 

 operculum irregularly oval, thin, semitransparent, unless in a very 

 old specimen, marked by strong lines of growth, brown, sometimes 

 greenish; lingual ribbon long. Teeth 1-1-1; median tooth with three 

 equal, slender, conical denticles; lateral teeth with a stout, much 

 curved denticle on the outside, having on its inner base a small, sharp 

 tubercle ; next is a short, simple denticle, inside of which is one 

 longer and broader, bifid at its tip, and inside a sharp, much curved 

 one, bearing a sharp curved tubercle on its outer edge. Thus we 

 have four denticles with seven points. Some of the tubercles are 

 occasionally wanting. The ova cases of this species are similar to 

 those of the preceding, but. are smaller and do not have a sharp, 

 edge, but a narrow partition separates the surfaces. The surface is 

 smooth, but the edge is crossed by twelve to fifteen ribs. A string 

 fifty-seven cent, long had eighty-eight disks, twenty-three mill, by 

 seventeen mill.; thickness three to four mill. Each disk has a circu- 

 lar opening two and four-fifths mill, in diameter on the middle of its 

 lower edge. The number of young in each disk is about twenty- 

 five, the average size of which, in April, is four mill, long and two 

 and two-fifths mill, broad, and these were evidently nearly full grown. 

 The eggs are laid two or three weeks later than those of Fulgur 

 carica. 



NASSID^. 



Tritia Risso, 1826. 



Tritia trivittata Conrad. Nassa trivittata Say, Am. Conch., 

 p. 7 7, 1822. Buccinum trivitattum Gould, Invert. Mass., p. 30; De 

 Kay, Moll. ST. Y., p. 132, pi viii, fig, 165. 



