Fam. 1, Plate 11. 



DORIS BILAMELLATA, Linnaeus. 



D. elliptica, albida, fusco longitudinaliter notata; pallio tuberculis magnis clavatis obtecto; 

 branchiis numerosis, pinnatis, 20-29 parvis, circum anum remote et transverse incurvatis ; capite velato. 

 Doris bilamellata, Linn., Syst. Nat. 12th Ed., v. 1, p. 1083. 



Johns., in Ann. Nat. Hist., v. 1, p. 53, pi. 2, f. 8. 

 Thomp., in Ann. Nat. Hist., v. 5, p. 86. 

 Macg., Moll. Anim. Aberd., p. 198. 

 For. and Hani., Brit. Moll., v. 3, p. 567. 

 fusca, Mull., Zool. Dan. Prod., p. 229, no. 2768 ? 



Idem, Zool. Dan., pi. 47, f. 6 — 9 (non desc.) 

 verrucosa, Penn., Brit. Zool., v. 4, p. 43, pi. 21, f. 23. 

 Turt., Brit. Faun., p. 133. 

 Flem., Brit. Anim., p, 282. 

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

 Elfortiana, Blainv., Bull, des Scien. 1806, p. 95, (sec. Leach.) 



Leach, Syn. Moll. Gr. Brit., p. 20, pi. 7, f. 1. 

 Leachii, Blainv., Bull, des Scien., v. 13, p. 450, (sec. Leach.) 

 affinis, Thomp., in Ann. Nat. Hist., v. 5, p. 85. 

 liturata, ' Beck/ Moller, Ind. Moll. Grcenl., p. 5. 

 obvelata, Bouch. Chant., Catal. des Moll, du Boul., p. 42. 

 Hab. On and under stones, between tide-marks, common. 



Body from half an inch to an inch and a quarter long, and about half as broad when 

 extended, of an elliptical form, nearly equally rounded at both ends. Cloak not extending 

 much beyond the foot, covered with stout, not much crowded, clavate, strongly spiculose 

 tubercles, of unequal sizes, being largest down the sides and about the branchial region, 

 smaller and more thickly set on the centre of the back, and also becoming small towards the 

 margin of the cloak. The colour is a dull yellowish white, marbled with umber brown ; the 

 brown markings forming three indistinct bands down the back; those on the sides are 

 generally darkest in colour, but very much interrupted and irregular in form ; that on the 

 centre of the back is more uniform, but less intense. The brown usually extends round the 

 bases of the tentacles, and the markings are mostly confined to the spaces between the 

 tubercles. In some individuals they are very indistinct, and in others entirely wanting ; 

 but specimens without markings are comparatively rare. The under surface of the cloak is 

 slightly granulated. Dorsal tentacles slender and nearly linear, swelling a little at the base, 

 brown, finely laminated for about three quarters of their length in front ; the upper laminse only 



