The Opisthohrancliiata of South Africa. 7 



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 0-5-0-75 mm.). The second, masti- 

 catory stomach 1'3 cm. long by a diameter of 2 (fig. Ic) ; 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. lib) ; 

 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 (PI. 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 prteputium 

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

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

 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. 



