AGLAJIDZA. 43 
dots, the gills whitish. The individuals were mostly of the same size : 
length of pleuropodia 7°5 mill., breadth of animal across extended 
pleuropodia 12 mill., alt.5°5 mill. 
Besides its smaller size and different coloring, the lack of a pos- 
terior flagellum on the mantle offers an obvious external difference 
between this form and G. rubrum. For description of anatomy see 
Bergh, J. ¢. 
Family AGLAJIDE. 
= Doridiide Bergh et al. 
Body oblong, with two dorsal shields separated by a transverse 
furrow, the head-shield having narrow, free lateral and hind mar- 
gins, posterior shield or mantle produced backward in two lobes or 
wings. Foot wide, truncated in front and behind, the sides contin- 
ued in fleshy parapodial (pleurapodial) lobes which stand erect or 
recurved at each side of body. Shell internal, posterior, consisting 
of a flat, solute spiral whorl and a minute spire, the inner rim of 
whorl! calcified, outer part membranous. Gill posterior, on right 
side, large, bipinnate. Buccal mass very large, without jaws or 
teeth. Penis with a superficial sulcus ; prostate gland large. 
. This family differs from Philinide and Gastropteride in the lack 
of a radula; from the latter family it is moreover distinguished by 
the more moderate size of the parapodial lobes, which are not used — 
as Swimming organs. 
The following account is largely abridged from Bergh’s two ad- 
mirable papers on Doridiide. 
Synopsis of Genera. 
Genus AGLAJA Renier. 
Head-shield without rhinophores or frontal processes. 
Genus Navanax Pilsbry. 
Head-shield with the front lateral angles produced into rhino- 
phores, as in Pleurobranchus. 
*k * 
