84 PROCEEDINGS OF THE ACADEMY OF [1880. 



branchial leaves and the anus otherwise naked. ^ The genital open- 

 ing as usual. The foot rather large, with a very fine furrow in the 

 anterior margin. The head as usual ; the tentacles relatively rather 

 large 



The three individuals were dissected. The peritoneum was color- 

 less. 



The central nervous system quite as in the former species, the vis- 

 ceral ganglions lying outside of the cerebral ; no distal olfactory 

 ganglion could be detected ; the buccal ganglia connected through a 

 commissure at least as long as the diameter of the ganglion ; the 

 gastro-ocsophageal ganglia and the eyes as in the former species. 

 The otocysts could not be detected. In the leaves of the rhinophoria 

 the spicula much more scanty. In the skin the same kind of not 

 much calcified spicula as in the former species ; the papillae of the 

 back very richly endowed with such, and commonly with a mass of 

 them projecting with their points (PI. IX, fig. 16) on the surface of the 

 papilke. 



The bulbus pharyngeus as in the former species ; the length about 

 1.5 mm., two-fifths of which is the straight, backwards projecting 

 sheath of the radula ; the cuticula of the lip-disk as usual ; the 

 buccal crop somewhat compressed, with rather long pedicel. The 

 tongue with nine or ten rows of plates, farther backwards sixteen or 

 seventeen developed and three younger rows ; the total number of 

 them, twenty-nine or thirty. The median plates (^fig. 9a, 10a) nearly 

 as in the former species, or a little shorter. The large lateral plates 

 (fig. 9b, 106) rising to the height of 0.12 mm., yellow ; their form as 

 in the former species, but at the inside of the hook at its root were 

 three to six or seven to eight small denticles. The external lateral 

 plates (fig. lOcd, 11) farther backwards, in number constantly eight; 

 the outermost (fig. 11a) very small, the others as in the former species. 



The salivary glands, as far as could be determined, were as in the 

 last species ; so also the oesophagus and crop ; also the stomach and 

 the intestine, which seemed to have the usual bag (pancreas, biliary 

 sac) at the pyloric part. The sanguineous gland flattened, grayish, 

 cordate. The liver of brownish-gray color. 



In the hermaphroditic gland no ripe elements were found, and the 

 anterior genital mass was very small 



* According to Dall, the " anus is terminal under the edge of the mantle." 

 This was erroneous. He did not see the gill, but regarded the dorsal papillae 

 as "branchial appendages." 



