68 Transactions of the South African Philosophical Society. 



A small number of species is known hitherto, excepting the N. 

 gratiosa of the Mexican Gulf,* only from the Philippine Seas (Cap) 

 and the Pacific Ocean. 



1. N. nigerrima, Bgh. 



2. N. Kubaryana, B. 



3. N. diaphana, B. 



4. N. gracilis, B. 



5. N. morosa, B. 



6. N. cristata, B. 



7. N. gratiosa, B. 



8. N. rubropapulosa, B. (Siboga). 



9. N. lineolata, B. (Siboga). 



10. N. Amitina, B. (Siboga). 



11. N. capensis, Bgh. n. sp. 



12. N. sp. (Semper i, B.). 



13. N. (?) rubro-ocellata, B. (Siboga). 



14. N. (?) Ediuardsi (Angas). 



Nembrotha capensis, Bgh. n. sp. 

 PI. XII., figs. 8-17. 



Of this form I had three specimens to examine, procured at rocks, 

 Kalk Bay. 



The two larger were examined by dissection, more particularly the 

 largest. When alive the colour was " dark blue." 



The length of the specimens was 3 - 8-4-2 and 6*7 cm. The latter, 

 the largest, had a height of 2 cm. at the gill, which was about 8 mm. 

 high ; the breadth 1-2 cm., that of the back proper 1*1 ; the breadth 

 of the foot 7 mm., the height of the club of the rhinophores 4 mm. 



The colour was uniformly deep blackish blue ; the sole of the foot 

 somewhat yellowish white. 



The form of the animal, as usual in the Nembrothae, rather com- 

 pressed. The short tentacles, as it were, refolded on the top ; the 

 sheath of the rhinophores somewhat prominent, the club of the 

 conical rhinophores with about 30 lamellae and a black terminal 

 papilla. The true back limited by a low brim ; the gill situated 

 before the middle of the back, the number of the gill-leaves 7, their 

 form as usual. The anal papilla completing the gill ring 1*75 mm. 

 high. The foot as usual in the Nembrothae. 



* R. Bergh, Rep. on the Nudibranchs (Blake Expedition). Bull, of the Mus. 

 of Comparative Zoology of Harvard College xix., 3, 1890, pp. 172-175. taf. ii. , 

 figs. 1-5 ; taf. iii. , figs. 1-4. 



