The Opisthobranchiata of South Africa. 73 



what depressed, whitish tongue with a deep cleft for the yellowish or 

 yellow radula (as far as could be determined by the nearly cartilagi- 

 nous state of hardening of the bulbus) ; the rasp contained about 

 17 rows of plates, in the sheath moreover about 13, the total number 

 of rows being thus about 30. On each side of the rather broad 

 naked rhachis 3 strong lateral plates and a series of outer plates. 

 The plates were yellowish ; the length of the first lateral plate was 

 (in a straight line) 0-40 mm., that of the first of the outer plates 0-20, 

 of the last mostly 0"10 mm. The three lateral plates (fig. 22) as in 

 the typical species," as also the outer ones (fig. 22a), whose number 

 rose to at least 22. 



The salivary glands (12-13 mm.) long, rather thin, somewhat 

 uneven, yellowish white, running along the oesophagus to the 

 anterior end of the liver. 



The oesophagiis 5 mm. long. The stomach 8-9 mm. long by a 

 diameter of 4-5, entering a little to the left in the cleft on the under 

 side of the anterior end of the liver. The intestine under the gill 

 rising to the surface somewhat to the left in the deep furrow of the 

 liver, running forwards along the left side of the liver, with its bend 

 overlying the stomach and anterior genital mass, and running back- 

 wards to the anal papilla ; the length of the intestine 4-4-5 cm., the 

 diameter 2-5-4 mm. The contents of the alimentary tract, especially 

 of the intestine, blackish, consisting chiefly of pieces of different 

 Bryozoa, fine sand particles and different spicula. 



The posterior visceral mass {liver) 16-18 mm. long by a height 

 and breadth of 11, yellowish, rounded behind; with a rather deep 

 cavity on the right side of the anterior end for the pylorus and the 

 anterior genital mass, and an obliqiie transverse furrow on the upper 

 side from the region of the gill. The substance of the liver yellow, 

 contrasting with the enveloping whitish hermaphrodite gland ; the 

 cavity small. No gall-bladder could be seen. 



The pericardium, the blood gland, the kidney, and the pericardio- 

 renal organ as formerly described.! 



The whitish hermaphrodite gland forms a rather (2-2-5 mm.) thick 

 layer ; in its lobules ripe genital elements. The hermaphrodite duct 

 with its ampulla as formerly described.]; The anterior genital 7nass 

 large, angularly rounded, of a diameter (in the two individuals) of 

 9-12 mm., whitish. The largest part of this is formed by the large 

 prostata (with the spermatotheca) ; this mass is short and pear- 

 shaped, 8-9 mm. long by a diameter of 3-5 and 6 ; the gland quite 

 envelops the spermatotheca, only leaving its neck free. The sper- 

 matotheca pear-shaped, 7 and 7"5 mm. long by diameter of 3 and 5 ; 

 ♦ Cf. I.e., p. 632. t Cf. I.e., 1880, p. 634. + Cf. I.e., 1880, p. 635, 



