1904.] MARINE FAUNA OF ZANZIBAR. 297 



Eunice coccinea Grube. (Plate XX. figs. 6, 7.) 



Eunice coccinea, Grube, Annulata SemjJeriana, p. 153, Taf. ix. 

 fig.l. 



The facts that this species is one of those with few salient cha- 

 racteristics and is already recorded from the Philippines, Singapore, 

 and East Africa, make it probable that a still wider distribution 

 could be given were its synonymy fully woil^ed out. Grube hints 

 at this in comparing his sj)ecies with E. guildiiigi Baird and 

 E. punctulata Gr. Orsd., both West Indian forms, the descriptions 

 of which, however, are too hasty to be of use. Mvich weight is 

 laid on the size of the gills, which is here, as in all other species, 

 found to be very variable. The proportions of the body and 

 distribution of the gills offer the most marked distinctions between 

 this species and E. afra, the pigmentation (&s seen in spirit- 

 specimens), prostomium and tentacles, structure of gills and setse 

 being almost identical in both. The parapodia differ in being 

 smaller, especially posteriorly, and the dorsal cirri are better 

 developed in the anterior part of the body. 



Full-gi'own sjoecimens are of nearly the same size as those of 

 E. afra, but with a much greater bixlk anteriorly though having 

 less behind. The following list * gives the sizes of the specimens 

 from the several localities in the Maldives : — 



(1) Xairfaru, Fadiffolu Atoll, reef : one specimen incomplete, 



11 mm. broad, and a fragment. 



(2) Hulule, Male Atoll, reef : one specimen, 210 X 7 mm. ; also 



a fragment. 



(3) Ofi" South Nilandu, from 24 fathoms : one, incomplete, 



7 mm. broad. 



(4) Off Hulule, Male Atoll, from reef and sand-flats : one small 



incomplete specimen, 3'5 mm. broad. 



Fragments were also found in sand nndei- boulders on Minikoi 

 reef. 



The East African specimens, none of which attain to the size 

 reached by those from the Maldives and Seychelles, were collected 

 as follows : — 



(1) Prison Island, Zanzibar Harbour, at low tide; two fair- 



sized specimens, 7 mm. broad (at maximum). 



(2) Ditto, in 3 fathoms off the north end of the island ; one 



specimen, 4 mm. broad. 



(3) Kokotoni Harbour, Zanzibar, 5 fathoms ; a ver}^ small 



specimen, 2-3 mm. broad. 



(4) Zanzibar Channel near its northern end, 10-15 fathoms ; 



one specimen, 6 mm. broad. 



(5) Mombasa Harbour, at low tide ; two specimens, 4 mm. 



(6) Wasin Harbour, 10 fathoms; one specimen, 4-5 mm. 



(7) Seven large specimens collected by Dr. E. P. Wright in 



the Seychelles in 1868. 



* See also the table on p. 294. 



