10 Marine Investigations in South Africa. Vol. V. 



rising to 0-30 mm., the body of the four outer measuring 0"10- 

 0- 14-0- 18-0-29 mm. in length. The median plates (fig. 9) some- 

 what plump, their legs rather short, their hook strong, and den- 

 ticulated along the margins ; the lateral plates (figs. 10-12) of the 

 usual form, the strong hook with 4-5 denticles at the root of the 

 outer margin, the point with fine denticles, mostly somewhat stronger 

 on one margin ; the 4 outer smaller (fig. 13), two without any 

 trace of a hook, and the next with a short one without denticles. 



The grayish oesophagus 6 mm. long. The yellowish first stomach 

 somewhat curved, 17 mm. long by a diameter of 10. The mastica- 

 tory stomach 6 mm. long by a diameter of 10'5 ; it showed arranged 

 in usual way 10 larger plates and in front 8 smaller ; the plates 

 of usual form, pyramidal, of reddish brown colour, of a height up to 

 4 mm. The posterior stomach 8 mm. long by diameter of 7 ; in 

 its cardiac part fine folds, on the pyloric margin a series of yellow 

 conical and pyramidal plates, 1-1'5 mm. high, always with broken 

 or worn point (fig. 14). — The gray contents of the stomachs formed 

 of different algae, undeterminable detritus and very small sand- 

 particles. The intestine as usual. 



The dirty dark-gray liver nearly globular, 2-4 cm. long by a breadth 

 of 2'2 and a height of 2 cm. 



The yellowish white hermaphrodite gland about 14 mm. broad by 

 height of 12 and a thickness of 4 ; its duct running with its short 

 windings along the whole of the under-side of the anterior genital 

 mass. This last, the albumino-mucous gland, 8 mm. long by a 

 height of 5 and a breadth of 4, yellowish white with the usual spiral 

 white band. The sperm-oviduct a little curved, 8 mm. long by 

 diameter of 2, quite as usual ; the short pyriform spermatotheca 

 3 mm. long, the spermatocysta half as large. The yellowish 

 prcepntiitm (fig. 15a) 8 mm. long, the retracted glans bent, 4 mm. 

 long, more whitish, with transparent furrow, with strong retractor 

 muscle. The inside of the praeputium grayish, in front black, 

 nowhere in the penis any trace of armature. 



6. Apl. poikilia, B. n. sp. 

 PI. II., figs. 20-21 ; PL III., figs. 1-4. 

 A single specimen was found at Kalk Bay (in Simon's Bay); it had 

 coloured the preserving fluid brownish. 



It was 7 cm. long by a breadth of 3 and a height also of 3 cm. ; 

 the length of the tentacles and of the rhinophoria 8 mm. ; the length 

 of the foot-wings 4 cm., by a height on the inside of 1"3 ; the length 

 of the mantle 3 cm. by a breadth of 2-2 ; the foot was 1 cm. broad. — 

 The ground colour of the upper side was grayish white, but for the 



