158 DOLABELLA. 



D. rumphii, and cuticle of a paler color, very thin and yellow. 

 Length 28 mill. 



Waigiou and Rawak (Quoy & Gaimard). 



Aplysia ecaudata RAKG, Hist. Nat. Aplys., p. 47, pi. 2 (1828). 

 D. ecaudata BRAZ., Proc. Linn. Soc. N. S. W., ii, p. 89. 



This species is smaller than D. rumphii, to which it has great re- 

 semblance. It is sufficiently distinguished by the absence of a fringe 

 around the posterior disk, and the lack of processes roughening 

 the whole surface of the body. The tentacles are placed nearer to- 

 gether than in other species. The anterior part of the body has 

 some but slightly projecting tubercles, and sometimes brownish 

 spots. 



D. truncata Rang. Length 10 cm. Body tail-less, pale, shaped 

 as in the preceding species, covered throughout with obtuse tubercles. 

 Posterior tentacles close, but less so than in D. ecaudata. 



Shell glassy ; white, the summit thick, without callosities, show- 

 ing 1J whorls below. Length 18 mill. 



Waigiou and Rawak (Quoy & Gaimard). 



A. truncata RANG, Hist. Nat. Aplys., p. 47 (1828). 



The individual upon which this species was based by Rang is not 

 in condition for detailed description or figuring. It was proposed by 

 him as a species with doubt, and merely to call the attention of 

 naturalists who may handle material from the locality to this form. 



D. tongana Quoy & Gaimard. PJ. 25, figs. 4, 5. Body conic, 

 cylindrical, tuberculate, glaucous. This species is a little smaller 

 than rumphii, of a more lengthened form, a little cylindric. Its 

 ears are less wide, and the papillae are replaced by little rounded 

 tubercles, only very slightly raised, which disappear upon preserva- 

 tion in liquor. The color is generally glaucous. While it inhabits 

 with rumphii, it cannot be confounded with it, nor can it be taken 

 for the young, the length being 6 or 7 inches. The shell is quite 

 small, white, incurved, with a brown spot at the middle of the larger 

 curve, a character perhaps accidental. 



Islet of Pangai-Modou, near Tonga (Q. & G.) ; San Giacinto t 

 Philippines (Chierchia). 



