AGLAJA. 53 



contracted, seeming to be not much developed, not connected above, 

 pretty rigid, with round hind end, the left one lacking a flagellum. 



The shell was of peculiar form, relatively larger and longer than 

 in other species, in the largest individual 5 mill, long, 3'4 broad. It 

 was entirely calcified, relatively thick, somewhat thinner in front, 

 and more yellowish there, otherwise chalk-white. The spire small, 

 not free; the process directed forward and downward large, the 

 hollow in it adjacent to spire pretty deep. 



Kadiack Is. (St. Paul) Bering Sea ; Yukon Harbor, Shumagin 

 Is., 6-10 fins. (Dall, Aug., 1874). 



Doridium diomedeum BGH., Bull. Mus. Comp. Zool., xxv, p. 211, 

 pi. 11, f. 1. 



Readily recognizable by its coloring and peculiar shell. 



A. OCELLIGERA Bergh. PL 14, figs. 82, 83, 84. 



The single individual was rather contracted, 12 mill, long, 9 wide, 

 and 9 mill. high. Color of shields and outside of parapodia gray- 

 brown with a multitude of whitish round flecks. Remains of a 

 lighter border of shields and parapodia could be distinguished, and 

 also on margins of the flagellum. The under side of the foot black- 

 ish with sparsely strewn whitish flecks. Gill yellowish. Living 

 animal said to be black-purple with yellow spots. 



Proportions as usual. The hind margin of anterior shield very 

 strongly produced (3i mill.) ; the posterior wings of mantle quite 

 separated, the left lobe prolonged in a flagellum 1 mill, long (pi. 14, 

 fig. 84). The shell measures 4 mill, in breadth (across the spire), is 

 strongly calcified, alabaster-like, with only a narrow yellowish cuti- 

 cular margin anteriorly. Spire somewhat projecting, the process 

 running forward and downward pretty strong, deepened at its base ; 

 the right part of the shell stronger, especially more behind. Penis 

 (pi. 14, fig. 83) dirty yellow, 4-5 mill, long ; glans with a strong 

 furrow, the apex sticking out of penial opening. Prostate strong, 

 a little longer than penis, of the same color, its end forked (f. 83). 



Sitka Harbor, 15 fms. (Dall, May, 1874). 



Doridium ocelligerum BGH., Bull. M. C. Z., xxv, p. 212, pi. 10, f. 

 10; pi. 12, f. 5-6. 



A. ADELLJE Dall. PI. 9, figs. 17, 18, 19, 20, 21, 22. 



Animal naked, about 16 mm. long, of a dark plum color, mottled 

 with fine vermiculate spots of golden yellow ; general form that of 



