66 PROCEEDINGS OF THE ACADEMY OF [1880. 



in the previously examined form, the largest (in the largest specimen) 

 reaching the height and the diameter of about 1.5 mm., those in the 

 neighborhood of the gill somewhat larger. 



Two smaller individuals were dissected, the larger being harder than 

 these and not so suitable for that purpose. The peritoneum w^as 

 colorless. 



The central nervous system just as in the former specimens, but the 

 buccal ganglia smaller than the olfactoiy, and the gastro-oesophageal 

 short-stalked. 



The eyes as above. The otocysts, under the glass, very distinct as 

 chalk-white points on the hinder and outermost part of the cerebral 

 ganglia. The leaves of the rhinophoria without spicula. The skin 

 and the papillae of the back as above or still more crowded with very 

 hard spicula. 



The oral tube large, (in both individuals) about 2.5 mm. long. The 

 bulbus pliaryngeus of the usual form, (in both individuals) about 3.0 

 long, by a breadth of 1.8 mm , and the height nearly the same; the 

 sheath of the radula projecting straight backwards 2.0 mm. The 

 buccal crop, lying to the left side of the bulbus, somewhat compressed, 

 of about 3.0 mm. largest diameter, the stalk nearly half as long as 

 the largest diameter of the crop. The tongue with ten rows of teeth, 

 further backwards also eleven or twelve developed and three younger 

 rows, the total number thus being twenty-four or twenty-five. They 

 were entirely as in the form first examined. 



The salivary glands, the pyloric part of the intestine, with its biliary 

 sac, and the liver as usual. The sanguineous gland whitish, much 

 flattened, covering the whole upper side of the bulbus pharyngeus and 

 the central nervous system ; a flattened cavity in its interior. The 

 hermaphroditic gland, through its more reddish color, contrasting with 

 the grayish color of the liver. 



The anterior genital mass 11.0 to 12.0 mm. long, by a height reach- 

 ing V.O to 8.0 mm., and a breadth of 4.0 to 4.5 mm. The ampulla of 

 the hermaphroditic duct lying transversely on the lowest and most 

 anterior part of the back of the mucous gland, rather straight or 

 forming nearly a circle, about 5.0 to T.O mm. long, whitish. The 

 spermatoduct making many coils on and before the anterior part of 

 the mucous gland; the first part about 35.0 to 45.0 mm. long, the 

 second nearly 25.0 mm. long ; the penis about 1.5 to 2.0 mm., pro- 

 jecting freely from the vestibulum, conical ; the glans seemed rather 

 short. The spermatotheca of about 3.0 mm. diameter, whitish. The 



