NUDIBRANCHIATE GASTEROPODA. 



Of the intestines only the bnlbns pharyngeus was examined. It had a length of i'" ! " by 

 a breadth of r25 mm , and it measured in height with its beantiful large sucking crop that resembles 

 a double kettle-drum (fig. 32), also r25 mm ; the sheath of the radula projected strongly from the posterior 



end. The tongue had thirteen rows of teeth, in the sheath of the radula were 21 rows, of which the 

 three hindmost ones had not vet been fully developed; thus the total number of rows of teeth was 

 34 1 ). The lateral teeth were slightly yellowish, the others colourless; the length of the median false 

 tooth-plates (fig. 31 a) was o-o5 mm ; the height of the lateral teeth (fig. 31 b) was <rio""", and of the outer- 

 most teeth (fig. 31c) about cro6" lin . The lateral teeth had the common form, very finely denticulated, 

 but not quite to the point, the number of the denticles appeared to be 15—20. The outermost teeth 

 were of the common form. 



This species is, especially by the structure of its radula (by the denticulated lateral teeth 1, 

 easily distinguished from the typical Lam. bilamellata (L,.); on the other hand I think it questionable 

 whether Lam. varians and hystricina which I have established (1. c), are not mere varieties of Lam. muricata. 



Dorididae cryptobranchiatae. 

 Fam. Cadlinidae. 



R. Bergh, System d. nudibranchiaten Gasteropoden. I.e. 1892. p. 11 00. 



Beside the Bathydoridae and a few Chromodoridae-') the Cadlinidae are the onlv cryptobranchiate 

 Dorididae with rhachidian tooth plates. The family comprises the genera Cadlina and Tyrinna*)\ 

 the latter is distinguished from the former by a peculiar form of tentacles and by the penis having 

 no thorny armature. 



Cadlina, Bgh. 



R. Bergh, Rep. on the Nudibrauchiata (Explor. of Alaska) I. 1879. p. 114 (170) — 125 (181 



— malakolog. Unters. Heft XVIII. 1892. p. 1100. 



— die Opisthobranehier (Report — Albatross). 1894. p. 168. 



The Cadliuae are of an elongated-oval, somewhat depressed form. The hack is covered with 

 fine, a little pointed papillae, not very densely set; the gill is composed of a few hi- and tripinnate leaves; 

 the tentacles are short, lobelike; the foot is rather powerful, with a rounded lore end with marginal 

 furrow. 



') The (2) specimens (from tin- neighbourhood ofBergen) which I have examined before, showed 32 and 11 rows of teeth. 



-1 While in several Chromodoridae rhachidian thickenings are found in the radula that may simulate median tooth- 

 plates, those thickenings are in a few forms, in Chromod. punctilucens ami scabriuscula (R. Bergh, rep. on the Nudibrau- 

 chiata (Blake-Exped.). Bull. Mus. of cotnpar. zool. Harvard college. XIX, 3. 1890. p. [64. PI. 1, fig. 7 a 12. PI. 1, fig 

 14), and in Ckrom. juvenca (Zool. Jahrb. , Supplem. Fauna chilensis. [898. p. 532. Taf. 31, fig. 7a) developed into real median 

 tooth-plates. 



3) 1. c. Fauna chilensis. [898. p. 523 — 526. Taf. 30, fig. 21 — 29; Taf..;'. fig. w m 



