1880.] NATURAL SCIENCES Or PHILADELPHIA. 69 



The liver of grayish-white color, of the length of about 9.5 mm. by 

 a breadth of 4 and a height of about 3.75 mm. ; the hinder end 

 rounded, the fore-end rather truncated, the anterior one-third on the 

 upper and right side flattened by the anterior genital mass. 



The heart and the renal syrinx as usual ; the median renal cham- 

 ber continued to the fore-end of the liver. The sanguineous glands 

 connected on the upper side of the central nervous system to a flat- 

 tened whitish mass. 



The glandula hermaphrodisiaca clothing the upper side of the liver, 

 and scarcely distinct from it in color ; in its lobules were large oijgene 

 cells. The anterior genital mass compressed, plano-convex; 4.0 mm. 

 long, by a height of about 3.3 and a breadth of 1.2 mm. The albumi- 

 nous gland on the left side of the mass and forwards, yellowish, very 

 finely gyrated on the surface ; the mucous gland whitish, pellucid. 

 The spermatoduct as well as the (3.0 mm. long) penis as in the L. 

 echinata. The spermatotheca rather small, spherical. 



L. varians, var. 



To this same species belonged certainly five specimens of a Lam- 

 ellidoris, which were taken by Dall in July, 18'73, at Unalashka 

 Island (Aleutians), at the depth of sixty fathoms on mud and stones. 

 Nevertheless, the color of these animals in the living state was, accord- 

 ing to Dall, " yellowish-white." 



The size and the particular measures accorded with those of the 

 more typical individuals, referred to above. 



The central nervous system as just mentioned, so even the eyes and 

 the otocysts. The bulbus pharyngeus of the usual form ; on the tongue 

 eleven rows of teeth, farther backwards twenty-six developed and four 

 not quite developed rows, the total number thus forty-one. The plates 

 quite as formerly described. The sucking-crop quite as in the typical 

 form, also the salivary glands. The whitish sanguineous gland entirely 

 covering the central nervous system. The penis as usual. 



Two specimens of another variety of this form were gotten by Dall, 

 In July, 1873, at Kyska Island, on sandy bottom, and at a depth of 

 nine to fourteen fathoms. In a living state they were, according to 

 Dall, of yellowish color. 



The length of the animals preserved in spirits was 8.5 to 9.0 mm., 

 by a breadth of 6.0 ram., and a height of about 3.5 mm. The color 

 was uniformly whitish or yellowish-white. One individual was dis- 

 sected. 



