ON A NEW SPECIES OF SCLER0GHE1LUS. 421 



Sclerocheilus antarcticus, n. sp. 



(Synonym : Eumenia oculata Gravier nee Ehlers.) 

 Eumenia oculata. Gravier, Deuxieme Exped. Antard. Franc. : Annelides Polychetes, 1911, p. 112. 



A Sclerocheilus bearing stronger, bent chsetse in the first, second, and third noto- 

 podia, but these are not so proportionately stout as in S. minutus. Stouter, bent 

 chsetse are not present in the succeeding notopodia or in the neuropodia, the arma- 

 ture of which consists only of slender capillary chsetse and furcate chsetse. Neuro- 

 podial cirri are present on all the segments (except one or two of the last formed) 

 from about the 18th or 21st. 



Only two specimens are known. One, the type-specimen, 19 mm. long, dredged 

 in 10 fathoms in Scotia Bay, South Orkneys (see p. 405) ; the other, the para-type, 

 11 mm. long, collected at low water on the east coast of Petermann Island, oft' Graham 

 Land (see p. 415). 



Type-specimen in Scottish Oceanographical Laboratory, Edinburgh. 



Para-type in Museum d'Histoire Naturelle, Paris. 



Sclerocheilus csecus Saint-Joseph is a nomen nudum (see p. 415), and S. pacificus 

 Moore is apparently not a Sclerocheilus, but should be referred to the genus Oncoscolex 

 (see p. 414). 



Addendum (June 21, 1915). — While this paper has been lying in type Mr 

 Southern has recorded the specimens of Sclerocheilus minutus from Blacksod Bay 

 and Clew Bay, mentioned on the opposite page, in Proc. R. Irish Acad., vol. xxxi, 

 Clare Island Survey, pt. xlvii (1914), p. 137. Prof. M'Intosh has given a general 

 account of S. minutus in his Monograph of British Annelids, vol. iii, pt. i (1915), 

 p. 42. Dr E. J. Allen, in a list of the Polychreta of Plymouth (Journ. Marine 

 Biol. Assoc, N.S., vol. x (1915), p. 640), states that S. minutus was formerly 

 frequently taken near Plymouth, but it has not been found during the last two 

 or three years in spite of special search. 



[June 22, 1915. Note by General Secretary. — The proofs of this paper and of 

 the accompanying plate were passed by the author on June 1, 1914 ; but owing to 

 the war and the unavoidable delay in obtaining delivery of the copies of the plate 

 from abroad, the paper could not be sent to press until to-day.] 



TRANS. ROY. SOC. EDIN , VOL. L, PART II. (NO. 14). 59 



