1880.] NATURAL SCIENCES OF PHILADELPHIA. 101 



mm., by a diameter of 1.0 to 1.5 mm. The contents of the stomach 

 and of the intestine indeterminable animal matter, mixed with an 

 enormous quantity of different and partly very handsome forms of 

 Diatomacese, with some polylhalamia and some small copepoda, and 

 fragments of the same. 



The liver about 9-9.5 mm. long by a breadth (at the forepart) of 

 6.5-5.5 and a height of 6.25-6.0 mm. ; the posterior half somewhat 

 pointed, the anterior notably flattened and excavated on the right side ; 

 around the cardia the liver appeared naked (not covered by the her- 

 maphroditic gland) of (greenish) gray color, in sections it was yel- 

 lowish. 



The ramifications of the aorta nearly as in the typical Dorididce,^ 

 the root of the posterior aorta still longer and the Art. syringis renalis 

 stronger and more ramified. The sanguineous gland yellowish-white, 

 rather flattened, of irregular triangular form, lobulated, about 3.5 mm. 

 long. 



The renal chamber large ; the yellowish-white renal syrinx about 

 0.75 mm. long, its tube somewhat more than twice as long, imme- 

 diately continuous with the tube on the floor of the renal chamber. 



The hermaphroditic gland easily distinguishable from the liver 

 through its more whitish color; the secondary (ovigerous) lobes rather 

 small; in the lobes zodsperms and large oogene cells. The anterior 

 genital mass of plano-convex heart-shape with the point down and 

 backwards; the length about 5.0 mm. by a breadth of 4.0 and a height 

 of 5.0 mm. The ampulla of the very thin and white hermaphroditic 

 duct resting on the upper posterior part of the mucous gland, yellow, 

 short and thick (4.0 mm. long by a diameter of about 1.25 mm. form- 

 ing a simple ansa. The vas deferens yellowish, strong, resting upon 

 the upper side of the genital mass with its large coils and freely de- 

 scending before its anterior margin to the penis, constricted about the 

 (fig. 9c) middle of its total length (30.0-35.0 mm.). The penis forming 

 the end of the spermatoduct somewhat thicker, about 2.0 mm. long, 

 somewhat curved ; its lower part hollow, the rest solid and prominent 

 in the cavity of the former as a cylindrical glans of the length of about 

 6 mm. The glans with about ten series of yellowish hooks, which 

 from a rather large basis raised to the height of about 0.04 mm. ; the 

 continuation of the armature reaching through the interior of the glans 

 and of the spermatoduct nearly up to the stricture of the last, but the 



» Cf. my Malacolog. Unters. (Semper, Philipp.) Tab. XLVIH, fig. 11. 



