NUDIBRANCHIATE GASTEROPODA. 



Of the intestines only the bulbus pharyngens was examined. It had a length of i mm by 

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

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

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

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

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

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

 most teeth (fig. 31 c) about cro6'" m . 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 teetli 

 were of the common form. 



This species is, especially by the structure of its radnla (by the denticulated lateral teeth), 

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

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



Dorididae cryptobranchiatae. 

 Fam. Cadlinidae. 



R. Bergh, System d. uudibranchiaten Gasteropodeu. I.e. 1892. p. n 00. 



Beside the Bathydoridae and a few Chromodoridae 2 ) the Cadlinidae are the only cryptobranchiate 

 Dorididae with rhachidian tooth plates. The family comprises the genera Cadliua 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 Nudibranchiata (Explor. of Alaska) I. 1879. p. 114 (1701 — 125 (181)). 

 malakolog. Unters. Heft XVIII. 1892. p. 11 00. 

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



The Cadlinae are of an elongated-oval, somewhat depressed form. The back is covered with 

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

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

 furrow. 



■) The (2) specimens (from the neighbourhood of Bergen) which I have examined before, showed 32 and 44 rows of teeth. 



-) While in several Chromodoridae rhachidian thickenings are found in the radnla that may simulate median tooth- 

 plates, those thickenings are in a few forms, in Chromod. punciilucens and scabriuscula (R. Bergh, rep. on the Nudibran- 

 chiata (Blake-Exped.l. Bull. Mus. of compar. zool. Harvard college. XIX, 3. 1S90. p. 164. PI. 1, fig. 7 a -- p. 162. PI. I, fig. 13 a, 

 14), and in Chrom. juvenca (Zool. Jahrb. , Supplem. Fauna chilensis. 189S. p. 532. Taf. 31, fig. 7 a) developed into real median 

 tooth-plates. 



i) 1. c. Fauna chilensis. 1S9S. p. 523— 526. Taf. 30, fig. 21 — 29; Taf. 32, fig. 21 — 24. 



