228 DORIDID.E. 



Doris bilamellata. 



Plate XXI. Figs. 299, 305 -.^OO. Plate XX. Figs. 285,286. 



Body elliptical, covered with pestle-shaped papilte, whitish varied with rusty 

 brown or flesh color and opaque white ; branchiiB twenty to twenty-five, lonor, 

 linear, simply pinnate, arranp^ed transversely in an oval, including several tu- 

 bercles. 



Doris hilnmrlkita, Liv. Syst Nat. (l'2tli cd.) i. 1083. — Johnst. in Ann. Xat. Hist. i. 53, 

 pi. 2, fi^-. 8. — TiiOMPS. Ibid. V. SG — McGiLLiv. Moll. An. Abcrd. 198. — Forbes 

 and Hanl. Biit. Moll. iii. 5G7. — Aldlr and Hanck. Monog. Br. Nudib. Moll. 43, 

 Fam. I. pi. 11. 



Doris fnsca, Mulleu, Zool. Dan. Prodr. 229, No. 276S ? Zool. Dan. pi. 47, figs. 6-9. 



Doi-is verrarosa, Penxant, Brit. Zool. iv. 43, pi. 21, fig. 23. — Turton, Brit. Fauna, 133. 

 — Fle.ming, Brit. iVnim 282. 



Dcyris vulgaris, Leach, Syn. .Moll. Gr. Brit. 19. 



Doris Elfortiana, Leach, Ibid. 20, pi. 7, fig. 1. — Blainv. Bull, dcs Sc. 1806, p. 95 (sec. 

 Leach). 



Doris Leachii, Blainv. Ibid. xiii. 450 (sec. Leach). 



Doris affinis, Thomps. in Ann. Nat. Hist. v. 85. 



Doris lilumia, "Beck," Moll. Ind. Moll. Groenl. 5.— Stimpson, Check Lists, 4 (1860). 



Doris ohcekUn, BoucH. Chant. Cat. des Moll, du Boul. 42. 



Doris coronatu, Agassiz, Proc. Bost. Soc. Nat. Hist. iii. 191 (no description). 



Animal elliptical, the sides nearly parallel and the ends equally 

 rounded ; })ale rusty, or flesh-color, or marl)led with the two ; sur- 

 face covered with ratlier large, uncciual, short pestle-shaped protu- 

 berances, the tips of the larger ones cream-colored. Tentacles short, 

 somewhat compressed, the upj)er three fourths obliquely laminated, 

 the laminee not fully meeting behind, tip knol)bed, bnfif-colored. 

 Branchial plumes long and slender, simply foliated, about twenty- 

 two in number, arranged in an oval across the back, somewhat con- 

 cave and interrupted posteriorly, and enclosing several tuliercles. 

 Edge of mantle serrated by the tubercles. Foot rather narrower 

 than the body, somewhat truncate behind. Head as broad as the 

 foot, crescentic ; tail pointed, much narrower than foot, on the mid- 

 dle of which it lies. Length, about an inch ; and about half as wide. 



Found under a floating log at East Boston, May, 1849. Also by 

 Professor Agassiz at Beverly, in June ; also dredged by Mr. Stimp- 

 son in Boston Harbor, near Governor's Island, in four fathoms, May 

 24, 1853. It has been noticed from Greenland by Moller, and in 

 Iceland ; also abundantly throughout Northern Europe. 



The eggs are excluded in a tape-like mass, which is attached by 

 one edge in a coil of one or two turns. (PI. XX. figs. 285, 286.) 



The spiculae are slightly elbowed, rounded at the ends, and some- 

 times having a small spine at the elbow. 



