EXPLORATION OF ALASKA. 227 
at the ueide of the root of the hook quite as in the Ad. pacijica. 
The external teeth (fig. 15) only nine or ten in number,! fewer than 
in that species, always absent on more than half the tongue. 
The salivary glands as in the next species, also the cesophagus, the 
stomach and the intestine. The liver also of nearly the same form, 
the inferior part of the posterior end continued as a little cone; the 
surface (especially of the back part) yellowish-white; the substance 
yellow. The vesica fellea in its usual place, small. The heart as 
usual, also the sanguineous gland. The renal syrinx and the urinary 
chamber as usual. 
The anterior genital mass rather compressed, of angular-roundish 
outline, of about 1.75 mm. largest diameter. ‘The spermatoduct seemed 
shorter than in the next species, especially the second part; the penis 
short. The spermatotheca pyriform; the spermatocysta of more oval 
form, having only about one-quarter of the size of the former, and filled 
with sperma. ‘The mucous gland whitish and yellowish. 
2. Adalaria pacifica, Bergh, nu. sp., Pl. IX, fig. 17; Pl. X, fig. 1-3; Pl. XI, fig. 15. 
Color lutescens. 
Dentes laterales (magni) hamo edentulo; externi numero 15. 
Habitat. Oceanum Pacificum ( Unalashka). 
Of this species Dall caught three specimens, in September, 1874, at 
Unalasbka, on a bottom of mud and shells. 
According to Dall, the color of the living animal is “ yellowish ;” 
the specimens preserved in spirits were of a uniform yellowish color. 
The length of the two larger specimens about 12.0 to 14.0 mm., by a 
breadth of 8.0 to. 90 mm, and a height reaching 4.5 to 5.0 mm.; 
the breadth of the foot 6.0 mm., the height of the rhinophoria about 
1.5 mm., of the branchial leaves 1.2 mm. 
The form as in the Ad. proxima, a little broader anteriorly. The 
back covered all over with a mass of rather stout, subglobose and sub- 
petiolate tubercles quite as in the typical species, mixed with much 
fewer smaller ones. The larger ones, under magnification, showing 
the perpendicular spicula shining through, while other spicula were 
detected irregularly scattered in the intervals between the tubercles. 
The rhinophor-holes nearly without projecting margin; the adjoining 
part of the back, behind, smooth; immediately before the holes, on 
1 The number of external plates is, according to Alder and Hancock, 
ten, to Meyer and Moebius, eight or nine. 
