138 NOTARCHUS. 



N. LEACHII Blainville. PL 61, fig. 59. 



Nearly the size of a fist. Body nearly globular, the foot being 

 an oval area with projecting borders. Dorsal opening ovate, with 

 thick borders, nearly symmetrical. Tentacles 4, slit ; 2 buccal 

 appendages ; a tentacular organ in the middle of the head ; no 

 trace of a shell. Color yellowish-white, rather translucent, the 

 whole upper surface bearing small tentacular appendages, irregularly 

 placed. 



Seas of India (Brit. Mus.). 



Bursatella leachii BLAINV. (? Brit. Encyclop. Suppl., Art. Mol- 

 lusca), Manuel de Malacol., p. 473, pi. 43, f. 6. F(ERUSSAC), Diet. 

 Classique d'Hist. Nat. ii, p. 588 (1822). RANG, Hist. Nat. Aplys, 

 p. 78. 



This form seems to be allied to N. indicm, but is larger, and the 

 head and tentacles are filamentous as in Aclesia. It is known only 

 by Blainville's description and illustration, the latter representing a 

 badly preserved specimen with the gill pulled out of the branchial 

 cavity. Compare N. gelatinosa Q & G. 



N. OCELLATUS Fe"russac. PI. 41, figs. 17, 18, 19. 



The mollusk for which this name was proposed is known only by 

 a very handsome drawing by Van Hasselt, communicated to Ferus- 

 sac by Temminck. No description is extant, but its form and the 

 general disposition of the external parts indicate that the animal is 

 a Notarchus. The general contour is sufficiently shown by the fig- 

 ures. Color a beautiful yellow, with a horse-shoe shaped series of 

 ocelli on the back, each with a blue center and orange ring. They 

 apparently encircle the dorsal slit, which was not seen by Van Has- 

 selt, probably on account of the small size of the animal. Length 

 41 mill. 



Java (?) 



Aplysia ocellata Fer., RANG, Hist. Nat. Aplys., p. 74, pi. 24, f. 2-4. 



N. NUDATUS Rang. PL 29, figs. 45, 46. 



Length 36 mill. Animal much dilated and ventricose, length- 

 ened and narrowed at the two ends. Integument smooth, dusky- 

 greenish, with some scattered pale dots. Dorsal opening quite long, 

 narrow, but gaping posteriorly. Foot narrow. (Rang). 



Near the Sandwich Islands, on floating Fucus. (Qu'oy & Gaim- 

 ard). 



