(jutiij Marine Lahoratorij , St. A/uIreict. 3 



The focljly winged bristles persist in tlie dorsal division to tlic 

 ])Osterior end, but no hooks aeeonipany tlieni. In the last 

 twelve or tliirtcen segments the br.meliite dimiiiish and dis- 

 appear. The seeond spceies^ iV, /r}t/e?)fa/a, is sniaUer (1 inrh), 

 with two j)airs of eyes arran<:e(l nearly in a transverse line 

 on the spindle-shaped head, and a pair of short, thick, deep 

 chocolate tentacles. Tiie first setigerous segment carries 

 only a ventral tuft of capilhiry bristles, and thus diHers from 

 the foregoing witli abranchia on the first foot, as it also does 

 in the piesenee of winged hooks with two sj)ikes above the 

 main fang on the fifteen; h segment ventrally. Hranehiie 

 commence on the seeond foot. Mr. Southern observes that 

 this species frequents laminarian roots, whereas A^. longi. 

 rostris is found in clean sand. 



Another form, Pohjdora c(xca, CL]rsted, whieli some have 

 confounded with Pah/dora jlava, has been procured from 

 diverse localities on Englisii, Scottish, and Irish shores. ]n 

 general aspect it lesenddos P. Jlava, but is distinguished ])y 

 the presence of stout aeicular bristles in the dorsal division 

 of the foot from the twenty-fifth segment in front of the anal 

 " sucker" backward. The strong bristles of the fifth sejjment 

 resemble those of p. y/c/tv/, with a bold hook at the tip and 

 no spur. 



]\Ir. Southern records Polydora giardi, Mesnil, a form with 

 a s|)ur below the terminal hook of the great bristles of the 

 fifth segment. The examination of a miriute example has 

 not proved the necessity for including it as yet as a separate 

 species. 



Aouides paucibranchiala, Southern, a small form from the 

 T^'est Coast oF Ireland, differs from the common Aouides 

 oxijcephala^ Sars, in having only ten or eleven pairs of 

 branchiie instead of 22-'23 pairs. The tail has four cirri, 

 whereas in A. o.ryccpJtala the caudal region has dorsally two 

 short conical loi)es, and \enf rally eight smaller conical cirri. 

 As the result of Mr. Southern's special attention to the 

 Cirratulidje in the rich region of the West Coast of Ireland, 

 two new species of Clicetozune have been found, viz. C. alata 

 and C. killariensis , both very small species ; yet both were 

 found mature. The former has a conical head and a pair of 

 deeply-placed eyes. The tentacles are large, and each is 

 aceomi)anied by a lateral ciirus. Capillary l)ristles occur in 

 all the dorsal tufts, the shorter forms with fiattened tips. 

 Hooks appear ventrally in the twenty-first segment, and 

 capillary bristles are always piesent in the ventral division. 

 The conical head of Cli<Etozone killariensis is devoid of eyes, 

 and the tentacles and their lateral ciiri are present in front 

 of the first bristled segment. Anus dorsal, with a ventral 



I* 



