56 Transactions of the South African Philosophical Society. 



of 4 ; the height of the rhinophores 1-5 ; the entirely everted gill 

 projected 2 mm., the diameter of the gill-star 6 mm., the length 

 of the leaves up to 3 ; the brim of the back 1*5, the breadth of 

 the foot 4 and the length of the tail 3 mm. — The colour clear 

 reddish white, the brim of the back chalk-white. 



The back quite even ; the very fine gill with its 15 leaves 

 (fig. 18) mostly extending out horizontally ; the anal papilla sub- 

 median ; the caudal and frontal veil about 1*5 mm. broad, the 

 white brim finely punctuated ; the tail projecting behind the 

 back. 



The diameter of the eyes O10 mm., the lens very clear yellow. 

 The diameter of the otocysts 0-08. The brim of the back filled 

 with sacks of very different size, stuffed with vesicles mostly 

 O04 mm. in diameter. 



The length of the mouth tube 2 mm. The whitish bulbus 

 pharyngeus with the (fig. 19) prominent rasp-sheath 3 mm. long by a 

 breadth of 2. The very strong (fig. 19) lip plate reddish brown, 

 the elements, which were variously bent (fig. 20), of a length up to 

 0"06 by a diameter of nearly 0*005 mm. The rasp of the tongue 

 yellowish, with many series of plates and a great number of 

 plates in the series. The plates of usual form (fig. 23) and all with 

 finely denticulated hook. On the very narrow rhachis small 

 triangular pseudo-plates (fig. 21a) of a length short of 0-04 mm. 

 The innermost plates denticulated as usual on both sides of the 

 hook, - 030 mm. high (fig. 21), the next 0*04 mm. high (fig. 22), the 

 outermost about 8-10 plates only denticulated at the point (fig. 24). 



The liver on the outside gray, in section black, 8 mm. long by a 

 breadth of 3 and a thickness of 2-5, sausage-shaped ; its fore-end 

 and upper side covered by the whitish yellow hermaphrodite gland. 

 The anterior genital mass whitish yellow, about 3*5 mm. long ; the 

 penis 1*5 mm. long. 



This form is different from the 13 species of Chromodoris 

 described by Eliot (I.e., iv., 1904, pp. 386-399) from Zanzibar ; 

 perhaps it is identical with one of the many species described from 

 the Indo-Pacific Seas. 



2. Chromodoris euelpis,* B. n. sp. 

 PI. VI., figs. 14-17. 

 One specimen was procured off Umloti Eiver mouth by large 

 dredge from a depth of 45 fms. and a hard bottom of sand and shells 

 on December 18, 1900. 



* 'EveXttiq, Good Hope. 



