228 DORIDID.E. 



Doris bilamellata. 



Plate XXI. Figs. 299, .305-309. Plate XX. Figs. 285, 286. 



Body elliptical, covered with pestle-.sliaped papilte, whitish varied with rusty 

 brown or fle.sh color and opaque white ; branchiai twenty to twenty-five, long, 

 linear, simply pinnate, arranged transversely in an oval, including several tu- 

 bercles. 



Dvrta bilamellata, Lix. S,yst Nat. (12th cd.) i. 1083. — Johnst. in Ann. Xat. Hist. i. 53, 

 pi. 2, %. 8. — TiiOMPS. Il)id. v. 86. — McGiLLiv. Moll. An. Aberd. 19.'». — Fokbes 

 and Hanl. Brit. Moll. iii. 567. — Alder and Hanck. Monog. Br. Nndib. Moll. 43, 

 Fam. I. pi. 11. 



Doris fusca, Muller, Zool. Dan. Prodr. 229, No. 2768? Zool. Dan. pi. 47, figs. 6-9. 



Doris verrucosa, Penxant, Brit. Zool. iv. 43, pi. 21, fig. 23. — Turton, Brit. Fauna, 1.33. 

 — Fleming, Brit. Anini. 282. 



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



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

 Leach). 



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



Doris affiiiis, Thojips. in Ann. Nat. Hist. v. 85. 



Doris liturata, "Beck," Moll. Ind. Moll. Gnx'nl. 5. — STniPSON, Check Lists, 4 (1860). 



Doris ohcelaln, Bouch. Chant. Cat. des Moll, du Bonl. 42. 



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



Animal elliptical, the sides nearly parallel and the ends equally 

 rounded ; pale rusty, or flesh-color, or marbled with the two ; sur- 

 face covered with rather large, unequal, short pestle-shaped protu- 

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

 somewhat comjiresscd, the u])per three fourths obliquely laminated, 

 the lamina3 not fully meeting behind, tip knobbed, buff-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 tubercles. 

 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 l)y Mciller, 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 spiculse are slightly elbowed, rounded at the ends, and some- 

 times having a small spine at the elbow. 



