158 DOLABELLA. 
D. rumphii, and cuticle of a paler color, very thin and yellow. 
Length 28 mill. 
Waigiou and Rawak (Quoy & Gaimard). 
Aplysia ecaudata Rane, Hist. Nat. Aplys., p. 47, pl. 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 103 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 14 whorls below. Length 18 mill. 
Waigiou and Rawak (Quoy & Gaimard). 
A. truncata Rane, 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. PI. 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 
ers are less wide, and the papille 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, 
Philippines (Chierchia). 
