12 Marine Investigations in South Africa. Vol. V. 



7. x\pL. WooDii, B. n. sp. 

 PL II., figs. 13-19. 



Together with a specimen of Doridiiim capensc, one individual of 

 this Aplysia was procured on tlie shore, East London (23.5.1902).* 



The furrow of the rhinophores and tentacles was velvet-black, 

 otherwise the animal was whitish with scattered traces of gray. Its 

 length was 8 cm. by a breadth of 1'7 and a height of 1'6; the 

 length of oval mantle 12 mm., the length of its oval hole 5, the 

 length of the sipho 5, the gill 14 mm. long by a breadth of 4 ; the 

 length of the foot-wings 18 mm. by a height (on the inside) of 7. 



The end of the sole of the foot was developed in a strange way, 

 perhaps pathologically. It formed, as it were, a roundish disc 

 (fig. 13) of a diameter of 9 mm., a little elevated and limited to the 

 rest of the foot on the sides and in front. The wings of the foot 

 passed one into the other behind ; the strong sipho broadly gaping ; 

 the large pallial gland with cells of uncommon size. 



The rather flattened shell (fig. 14), of a length of 13 by a breadth 

 of 8 mm., very thin, cuticular with very slight and spread traces of 

 calcination, with a small uncalcified nucleus, somewhat pointed in 

 front. 



The central nervous system quite as in other true Aplysige. 



The mouth tube on the outside and the inside dark gray. The 

 hulhus pharyngeus 7 mm. long by a breadth of 4 and a height of 

 3'5. The mandibles dirty yellow, 3 mm. high by a breadth of 

 2 ; their elements (fig. 15) reaching a height of 0"25 by a diameter 

 of 0*013. The rasp of the tongue yellow, perhaps containing 19 

 and the sheath 18 rows of plates, on each side of the median plates 

 probably about 30 lateral. The plates yellow ; the breadth of the 

 median 0"24 mm. ; the length of the basal plate of the first lateral 

 0-20, of the second 0-023 ; the length of the four outermost 0-05- 

 0-08-0"08-0*13 mm. The median plates (fig. 16) broad, with short 

 and broad hook, which is serrated as far as the pointed end ; the 

 three outermost lateral plates (fig. 19) small, without hook ; the 

 other plates are similar in form, have a very pointed hook with a 

 strong denticle on each side; the innermost (fig. 17) had moreover 

 some finer denticles on the outer margin of the hook, which wete 

 absent on the rest (figs. 18, 19). 



The white salivary glands quite as usual. 



The pharynx gray. The oesophagus whitish, 10 mm. long by a 

 diameter of 4. The first stomach 4 mm. long and broad, at the pylorus 



* It is named after ^Mr. John Wood, East London, who has I'cndered valuable 

 service in the discovery of this and other marine animals new to science. 



