Clidh/ Mttiiiie Lahoratory, St. AnJiewg. o? 



tiiloa ratlicr than niulcr the Syllids. It lias capiUary dorsal 

 and jointed ventral biistles. The anthor allndes to its rela- 

 tionshij) with Arrocirnis fron(iJi/is ni' Marion and Bobretzky. 

 lie eharacterizes the "^enns thus : — Cirratnlids with lateral 

 hranehite iu several anterior segments ; a pair of ant.'nnie 

 on the head. I'ciristoniinin withont appendaijes. His ex- 

 anipKs ranj^ed tioni 07') to 10 em. and ha I thirty-two sejjj- 

 nients. Head and first six segmerits with brown eorpnscles 

 in the skin, and the body eovered with small papilhe. 

 Head with a median process anteriorly, twoclavate antenme, 

 and four eyes arranj^ed in a curve fron> side to side, the larger 

 beinj; external. Segments 2 to 5 with lonj(, slightly club- 

 shaped branchiie. Dorsal bristles begin on the fourth seg- 

 vneut (of the body), and the ventral division has jointed 

 hooks. Anal segment rounded, without appendages. Pro- 

 boscis unarmed. Kgg'^ brownish yellow. 



Caullery ami Mesnil* (1898), who received a specimen 

 O'GO mm. long, collected by Langerhaus, from Alarcuzeller, 

 j)oint out that the long bristles are spino*;e and much 

 resemble the temporary bristles of the pelagic larvie of 

 Spionids and Sabeilarians. They think it a pelagic aniuud 

 and simdar to the genera Thanjx and Chatozone, and, 

 further, as a fixed epitokous form. Acrocirms {A. frontifilis 

 and A. vulidus) present analogous features. On the other 

 hand, Ledon sexuculata, \\'ebster and Benedict, has iu the 

 dorsid division of each foot capdlary bristles OGO mm. long; 

 they point out the identity of the hooks with those of 

 Acrucirrus. 



Mr. Southern f, to whom I am indebted for an examination 

 of the annelid, considers that its systematic affinities are 

 at present not clearly recognized, lie adds, ''that the rela- 

 tion to the Syllidie is very slight, whilst that to the Cirratu- 

 lidie is not so pronounced as Caullery and Mesnil maintain.'* 

 He procured examples iu Blacksod Bay in weeds from rock- 

 pools, in Laminarian roots, and with weeds in 1—4 fathoms ; 

 and by the dredge iu Clew Bay and Ballyuakill Harbour iu 

 a few fathoms. 



EXIM.ANATIOX OF TIIi: PLATES. 



I'l.ATK I. 



Fi(j. 1. 'V\\\i^ oi ('istcni(le>i fiypcrhoifa^y{vL\my^xey\. luilurgod. 

 Fiy. 2. I'ortidii of tlie same, .still further enlarged, to show the gvaiiis, 

 uineteeii to twenty-two of which occur at the wider end. 



* Annales Univ. Lyon, fa.sc. xxxix. p. THO. 



t I'roc. Iidv. Iri-li Acad. \ul. xx\i. no. 17. p. 1:.'0. 



