312 J ME. CYRIL CEOSSLAKD ON THE [Feb. 16, 



species and E. antennata that these structures afford no certain 

 means for their separation. 



The size and distiibution of the gills form a striking likeness 

 to E. indica. 



The set* are like those of E. indica in the bent, bluntly pointed 

 termination of the acicula, absence of a third hook to the compound 

 setfe of posterior feet, and the presence of three or even five of 

 the trifid acicular setse in each foot. But the guard of the 

 compound setse is not produced to a point beyond the hooks in the 

 way which is so characteristic of E. iiidica. 



The young specimen, less than 1 mm. broad, referred to above 

 is but doubtfully identified as of this species. The prostomium is 

 quite undivided in front, but the tentacles are very deeply an- 

 nulated. Simple gills, as long as the dorsal cirri, occur on feet 6 

 to 10 only. The setse are of the antennata type. 



A very nearly allied species is described by Ehlers {Floiida 

 Anneliden), named E. riohra by Grube (Annulata Oerstediann). 

 The jaws, however, are delicate plates and the acicular seta is some- 

 times bidentate. 



Eunice antennata Sav. (Plate XXII. figs. 1-7.) 



Eimice antennata Ehlers, Ostafricanische Borstenwiirmer, 

 iSTachr. Ges. Gott. 1897. 



E.flaccida Grube, Anneliden des Rothen Meeres, Monatsb. d. 

 k. Akad. Wiss. Berlin, 1869 ; Gravier, Xouv. Arch, du Museum de 

 Paris, 1900. 



E. torresiensis McL, 'Challenger' Reports, xii. p. 270. 



E. elseyi Baird, McI. torn. cit. p. 286. 



*E. paucibranchiata Grube. 



The identity of this common species with Grube's E.flaccida is 

 rendered certain by the full description of specimens from the 

 same locality by Gravier. Although Ehlers does not give reasons 

 for his identification of the specimens from Zanzibar which he 

 examined with Savigny's E. antennata from the Gulf of Suez, it 

 is evident that he is dealing with the same species again, so that 

 the circumstantial evidence for the identity of the two amounts 

 to a practical certainty. Savigny's descilption taken by itself is 

 hardly sufficient, as he does not describe the setee nor the jaw- 

 plates with enough care. The figures of the head, feet and giUs, 

 and general body-form can, however, hardly be surpassed. 



The abundance of large specimens of this species in East Afiica 

 forms a contrast with its comparative raiity in the Maldives, 

 whence only two full-grown specimens were obtained. This 

 difference is probably connected with the habitat (which, for the 

 African specimens, is given below), and it is conceivable that a 

 dwarf vaiiety has been evolved in the latter locality. In Ehi-en- 



* I owe the discovery of this synonym to the examination of a specimen lately lent 

 to me by Prof. Mcintosh, which was labelled by Prof. Grube himself and recorded 

 from the Bass Straits. See note on JB. hassensis, page 318. 



