ZOOLO^T OF FERNANDO T^OKONHA. 



497 



Eeeve describes this species as " smooth along the summit, very 

 closely finely striated on each side." This is not at all accurate. 

 The central portion of the non-terminal valves has a defined 

 elongate subtriangular space which is sculptured with minutely 

 granular lines, and the sides are densely but rather more coarsely 

 granulated. The figure (47) of the detail of sculpture of C. sj)i- 

 culosa, Eeeve, which I believe to be the same species, gives quite 

 as good an idea of the ornamentation as figure 109. The outer 

 margin of the mantle bears a fringe of the same glassy spicules as 

 compose the tufts. 



42. Doris, sp. 



A single specimen was obtained, which appears to belong to the 

 same species as an unnamed example in the British Museum from 

 the "West Indies. 



43. Apltsia, sp. 



An animal about an inch long is all that was found. It pro- 

 bably is not full-grown. No attempt has been made to identify 

 either this or the preceding, as both belong to difiicult groups 

 requiring special study. 



44. SiPHOiSTARiA PiCTA, var. ? * (Plate XXX. figs. 4-4 Z>.) 

 Hab. Eio Janeiro {d'' Orhigny). 



The specimens from Fernando Noronha are externally blackish 

 with numerous white radiating costse. The inner surface also is 

 much darker than in the type specimens from Brazil. S. hispida^ 

 Grould, also from Rio Janeiro, appears to be the same species. 

 S. lineolata, d'Orbigny, from Cuba, is a larger form, and the only 

 species that appears to have been discovered in the West Indies. 

 One or two species are known from Bermuda {S. hrunnea, 

 Hanley) ; and Say has described a form from East Florida. 



45. Venus (Anaitis) paphia, Linne. 



Hal. West Indies and Cape Verd Islands {Brit. 3fus.). 



46. Cardium stJBELONGATUM, Soiverhi/. 

 Sab. St. Thomas, "West Indies. 



47. Cardtum medium, Linnci. 

 Hal). West Indies. 



* D'Orbigny, Voy. Amer. Merid.' vol. v. p. 469, pi. 50. ff. 7-11. 



