42 Transactions of the South African Philosophical Society. 



Archidoris capensis, Bgh. n. sp. 



One specimen, now very much hardened, was procured at Cape 

 Point by large trawl ; it had been first treated with cocaine. 



The specimen was of a uniform white colour. Its length was 

 40 mm. by a breadth of 22 and a height of 12 mm. ; the height of 

 the rhinophores was 3, the diameter of the gill-aperture 5, the height 

 of the gill-leaves 5 mm., the breadth of the brim of the back 7 ; the 

 tentacles 2 mm. long ; the breadth of the foot 11, of its brim 3 mm., 

 the length of the tail 5. 



The form oval, somewhat depressed. The back even, quite finely 

 chagreened, with broad brim. The somewhat clumsy club of the 

 rhinophores with numerous lamellae, stiffened by closely set long 

 very hardened spicules. The number of gill-leaves 6. The ten- 

 tacles finger-shaped. The foot strong, the anterior margin with 

 deep furrow, the upper lip with median cleft. 



The cerebro-pleural ganglia somewhat long, the pedal short, pear- 

 shaped. The eyes of a diameter of 0'22 mm., with large yellow 

 lens ; the otocysts measuring 016 mm. in diameter packed full with 

 otokonia. The skin full of very hard long spicules of a diameter up 

 to 0025 mm., mostly lying in bundles sometimes irregular and star- 

 shaped. In the interstitial connective tissue a mass of similar 

 spicula. 



The mouth tube 5 mm. long. The somewhat yellowish bulbus 

 pharyngeus (inclosing the strong 3 mm. projecting rasp-sheath) 9 mm. 

 long by a height of 5-5 and a breadth of 6 mm. ; the lip disc covered 

 by a colourless and not thin cuticula. The broad tongue with yellow 

 rasp, the rhachis narrow, the number of rows about 28, in the 

 sheath 33, the total number being thus 61 ; about 90 plates in the 

 series on each side ; the plates of the common hook form; the height 

 of the outermost 0*14 mm., of the sixth 0*20, the height rising to 

 0*25 mm. 



The salivary glands long, well developed, of a diameter up to 2 mm., 

 reaching backwards to the liver, the ducts very short. 



The stomach globular, 5 mm. in diameter, projecting from the 

 cleft of the liver ; the intestine 24 mm. long by a diameter of 1*5. 

 The liver on the outside yellowish, its substance yellow, of conical 

 form, its fore-end obliquely truncate, 17 mm. long by a breadth 

 anteriorly of 10. 



The oval pericardium 10 mm. ; the pericardio-renal organ some- 

 what flattened, 1-5 mm. long. 



The thin layer of the whitish hermaphrodite gland contained in its 

 lobules ripe genital elements. The anterior genital mass of irregular 



