664 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



ACT^EON PUNC^ro-STKiATA Stimpson. Plate XX V^, fig. 165. 



Shells of New England, p. 51, 1851 ; H. and A. Adams, Genera, vol. ii, p. 5. Tor- 

 r.atella jonncto-stviam C. B. Adams, Boston Jour. Nat. Hist., vol. ili, p. 323, 

 Plate 3, fig. 9, 1840 ; Gould, Invert., ed. i, p. 245, fig. 188 ; ed. ii, p. 224, fi'g. 515. 



Cape Cod to South Carolina. Yiue^^ard Sound, and Buzzard's Bay, 

 not uncommon 5 Long Island Sound, rare ; Hantington and Greenport, 

 Long Island (S. Smith). 



DoRiDELLA Yerrill. 



Body smooth, oval, convex. Dorsal tentacles retractile, without 

 sheaths. Head ]irominent, the lateral angles prolonged anteriorly as 

 short oral palpi or tentacles. Foot broad, cordate. Branchiae tufted, 

 situated near the posterior end, on the right side, in the groove between 

 the mantle and foot. 



DoRiDELLA OESCURA Yerrill. Plate XXY, figs. 173 a, 5. (p. 400.) 



American Journal of Science, vol. 1, p. 408, figs. 2, 3, November, 1870. 



Body broad oval, 7.5™°^ loDg and 5™™ broad ; back convex, smooth. 

 Foot broad, cordate in front. Oral disk broad, emarginate or with con- 

 cave outline in front j the angles somewhat produced, forming short, 

 obtusely pointed, tentacle-like organs, which in extension project beyond 

 the front edge of the mantle. Dorsal tentacles small, stout, retractile. 

 The branchiae consist of a tuft of slender filaments, usually concealed 

 by the edge of the foot. Color of body dark brown, lighter toward the 

 edge, as if covered with nearly confluent blackish or brown spots, the 

 whitish ground-color showing between them; foot, oral disk, and dorsal 

 tentacles white ; the central part of the body, beneath, with a three-lobed 

 yellow spot due to the internal organs. Young specimens are flesh- 

 color or yellowish brown above, specked with darker brown. 



Yiueyard Sound and Long Island Sound to Great Egg Harbor, Xew 

 Jersey. Savin Eock, at low-water, under stones ; ofl^ South End, 4 to 5 

 fathoms, shelly. 



NUDIBRANCIIIATA. 



Doris bifida Yerrill. Plate XXY, fig. 176. (page 307.) 



American Journal of Science, vol. 1, p. 406, 1870. 



Outline broad oval, widest anteriorly, about 25""^ long by 12""^^ broad, 

 in extension ; back very convex, mantle covered with numerous, scat- 

 tered, small but prominent, pointed papilla3. Tentacles rather long, 

 thickest in the middle, the outer half strongly plicated with about twenty 

 folds, but with a smooth tip, the base surrounded by small papilhTe. 

 Gills retractile into a single cavity, united togetlier b^^ a partial web, 

 deeply frilled, much subdivided, bipinnate, the subdivisions fine and 

 slender. Foot very broad, in extension projecting back beyond the 

 mantle about a quarter of an inch, slightly tapering, rounded and 

 slightly notched at the end. Oral disk or veil crescent-shaped, the front 



