54 Transactiuns of the South African Philosophical Socictij. 



The genital system very little developed ; no ripe genital elements 

 were seen ; the penis seemed unarmed. 



This form could not be referred to any of the hitherto established 

 genera. It had a smooth back with very narrow margin, simply 

 pinnate gill-leaves. Moreover, no armature of the lip disc, and 

 uniform hook-formed lingual plates. 



Genus (?). 



Doris (Gen. ?) glabella, B. n. sp. 

 PI. VI., figs. 9-13. 



One specimen was procured off Buffalo Bay by shrimp-trawl from 

 a depth of 30 fms. with sandy bottom, with stony Polyzoa. It was 

 very contracted and hardened. 



The colour was yellowish white, the gill more yellow, and the 

 club of the rhinophores brownish. The length was 4 cm. by a 

 height of 2-2 and a breadth of 2 ; the length of the club of the per- 

 foliated rhinophores 3 mm. ; the diameter of the prominent gill 11, 

 its leaves — 7 mm. long, the strong anal papilla 2 mm. high ; the 

 breadth of the foot 6 mm., the length of the tail 6. 



The body somewhat compressed, the even back rounded, passing 

 into the sides of the body. The 10 leaves of the gill mostly bifid or 

 trifid, often branched, set in horseshoe form, simply pinnate 

 (fig. 9). 



The nervous system and the eyes as usual. In the skin, besides 

 the enormous quantity of glandular cells, calcified cells and cell- 

 groups, long, irregular grumous calcified spicula. 



The mouth tube 6 mm. long. The bulbus ijharipKjeus 12 mm. 

 long, 8 mm. broad, and 7 high ; the thick rasp-sheath rather 

 prominent ; the lip disc with thick, yellowish cuticle, and a 

 narrow armature of, as it were, chitinous cylinder-epithelium of a 

 height of about 0025 by a diameter of 0007 mm. (fig. 10). 

 The broad rasp of the toiujuc with about 60 series of plates, in 

 the sheath moreover about 70 ; in the long rows on each side of 

 the narrow naked rhachis about 200-300 plates. The plates clear 

 yellow; the innermost (fig. 11) of a height of 008 mm., the 

 three outermost 0025-0 04-008 mm. high, the height of the 

 plates from both ends of the rows abruptly rising to 0*25 mm. 

 The plates were of the common hook form (fig. 12), never denti- 

 culated, the 1-2 outermost (tig. 11) small and somewhat irregular. 

 A peculiar deformation was rather often seen in the different 



