88 PROCEEDINGS OF THE ACADEMY OF [1819. 



the cutting eds;e were on each side seven to nine denticles : on the 

 foremost teeth often nine; the breadth of the foremost teeth wns 

 about 0.13, of the twelfth 0.18 mm., the width amounting to 0.37 

 mm. or less. 



True salivary glands do not exist. The oesophagus, the stomach, 

 the intestine and the hepatic system, as far as could be deter- 

 mined, were quite as in the typical form. 1 



The vascular system and the renal organ are as formerly de- 

 scribed by me. 2 



The hermaphroditic gland 3 is quite as in the typical form, also 

 the hermaphroditic duct with its ampulla, and the spermato-duct 

 with its two parts, one thicker and brownish, the other thinner 

 and whitish. So also is the long (about 7 mm.) whip-like penis, 

 which is drawn back and bent up and down in the thinner sheath- 

 like part. The latter showed rather strong, circular, muscular 

 belts, and had a M. retractoris attached near the neck; the con- 

 tinuation of the spermato-duct could be followed through the 

 whole length of the penis to its point. The sjiermatolheca forms 

 a short bag about 1.-3.0 mm. long, filled with sperma. The ante- 

 rior genital mass is rather compressed, and about 4.25 mm. in 

 length. 



DENDRONOTIDiE. 



The Dendronotidee form, like the ScyUseidse and Bornelhdse* 

 in certain respects a connecting link between the large group of 

 AeoJidiidse and the still larger group of Dorididse. In those 

 families the liver forms, as in the Dorididse, a large compact mass, 

 but branches are given off from the same, that penetrate (as very 

 much reduced hepatic lobules) the dorsal appendages, which in 

 this way become homologous with the papilla? of the Aeolidiidse. 

 In most other respects these groups agree with the Aeolidiidse, 

 especially in the nature of the bulbus with its strongly developed 

 mandibles, and in the presence of only one spermatotheca. 



zur Kenntn. d. Moll, des Sargassomeeres, 1. c. , 1871, p. 1287), he saw thirty- 

 seven to forty-two teeth (in two individuals) with six denticles. 

 1 Cf. 1. c, Tab. II. fig. 30. 2 Cf. 1. c , Tab. II. fig. 31-32. 



3 Cf. 1. c, Tab. II. fig. 34-35. 



4 These two families have been examined by the author in his Mai. Un- 

 tersnch., Heft vii. 1874, pp. 287-308 (Boniellidce), and Heft viii. 1875, pp. 

 315-343 (Scyllmdm). 



