The Opisthobranchiata of South Africa. T 



stomach was 3 - 5 cm. with a diameter of 1*6 (the gray folds of the 

 oesophagus continued through the foremost part of the stomach. 

 Its cavity was filled with long, whitish, somewhat ramified threads of 

 an alga of a diameter mostly of O5-0"75 mm.). The second, masti- 

 catory stomach 1*3 cm. long by a diameter of 2 (fig. lc) ; in the 

 cardia a belt of smaller plates, set in 3-5 irregular quincunx-series 

 (figs. 17, 18) ; behind these the two series of larger plates (fig. 17b) ; 

 these last of a dirty brown colour, mostly of the pyramidal form, 

 sometimes (fig. 18) more hornlike, rising to a height of 8 mm. ; the 

 plates of the cardial belt smaller, less regular, sometimes pointed- 

 conical rising to a height of 4 mm. The third stomach (fig. Id) 

 2 cm. long by a diameter of 2*3, its wall thinner than that of the 

 two other ; it passes immediately in the intestine (fig. le), which 

 has a diameter of 7 '5 mm., and as usual runs in the surface of 

 the liver. 



The liver blackish gray, black in section, 4-5 cm. long by a height 

 of 3 and a breadth of 3*5 cm. 



The hermaphrodite gland placed obliquely on the hinder end of 

 the liver whitish, of a breadth of 3 cm., with a height of 2, and 

 a thickness up to 1*2 cm., rather smooth on the free side; in the 

 lobules ripe genital elements. The duct rather short, of a diameter 

 of 4 mm., forming an ampulla with short windings, extending 

 along the whole side of the anterior genital mass. The anterior 

 genital mass large. The muco-albuminous mass oviform, of a 

 length of 20 by a diameter of 11 mm., yellowish in the pos- 

 terior two-thirds, with some (4) grayish spirally circular bands. 

 The strong, nearly cylindrical spermoviduct nearly as long as the 

 whole gland by a diameter of 8 mm., the under half brown, the 

 upper yellowish. The spermatotheca globular, of a diameter of 

 9 mm., its duct a little longer. The penis a little bent (PL I., 

 fig. 19), 15 mm. long, at its hinder end a strong retractor. This 

 hinder end globular, of 3 mm. diameter, whitish ; the rest, the 

 praeputium, 12 mm. long, grayish. The inside of the praeputium 

 darker, with longitudinal folds, of which two stronger are continued 

 in the furrow of the glans ; from the bottom of the preputial 

 cavity projected (fig. 20) the pointed head of the glans, show- 

 ing a furrow, which is continued up into the small cavity of the 

 rest of the glans (fig. 21) ; in retracted state of the penis situated 

 behind the praeputium (fig. 19a), it did not show any glandular 

 structure. 



This form may represent a new species. 



