52 AGLAJA. 
A. puRPUREA Bergh. PI. 13, fig. 78. 
Living animal blackish-purple. Much contracted individual in 
aleohol is dark brownish, almost black in color, on the anterior 
shield; the hind body dirty reddish-brown ; both quite finely punce- 
tate with yellow. The sides of the body as well as the lower half of 
the upper side of the foot-wings (parapodia) yellowish-brown, while 
the upper half of the parapodium is paler and vertically striated, as is 
also the hind half of the upper side of the tail. Gills dirty yellow; 
the hind wings of mantle quite black, finely punctate with yellow 
and with lighter margin. Entire under surface of animal, with the 
outer (under) side of the parapodia black, finely punctured with 
yellow. The length, to base of posterior wings, 3°8 cm., alt., 2°8, 
breadth, 3°2. The length of head-shield is 2 cm., that of posterior 
wings 1°2cm. Length of the contracted gill 1°5 cm. 
Form most as in A.depicta. Posterior wings bound together con- 
tinuously above, the left one without a flagellum; their margins 
were, perhaps, somewhat notched. ‘The peculiar spot in front under 
the margin of the anterior shield could not be discovered. Gill 
yellowish. 
Shell without trace of calcification, horn-yellow, on anterior mar- 
gin quite colorless, thin, only on the back margin a little thickened. 
Form as usual, the spire not solute, its continuation downward and 
forward not large, the extension of the last whorl backward not long, 
transverse diameter of the shell about 13 mill. 
Catalina Island, California, (Dall, 1874) 
Doridium purpureum Brereu, Mus. Comp. Zool., xxv, p. 209, pl 
OR ea 
The figure represents the penis-sack (dark portion) and its pros- 
tate (light portion). F 
A. DIOMEDEA Bergh. PI.1,f.14; pl. 15, fig. 95. 
Largest specimen measures, length, 10, breadth 6; alt. 5 mill. 
others measure 7 x 5 x 43. Color dark brownish-black, with sparsely 
strewn whitish and yellowish flecks on the back, foot and outside of 
parapodia; side margins of posterior shield dirty light yellowish ; 
sides of body and furrow between anterior and posterior shields, 
bluish-gray; upper side of foot-wings and the upper side of tail 
grayish, the gill yellow. Color in life said to be nearly black- 
Form as usual. Back shield somewhat longer than the head-shield ; 
no trace of olfactory organ discoverable. Hind wings of mantle 
