Bucnanan— Report of Polychets. 177 
V.—Hydroides pectinata (Kuppf.) v. Mrallr. (= H. norvegica, Gunn. 
and Hupomatus trypanon, Clp.) 
Several specimens of this species occurred, all attached to the 
spines of Cidaris papillata, dredged both 40 miles off Achill Head, 
at a depth of 220 fathoms, from a bottom of fine sand, and 45 
miles off Blackrock, at a depth of 275 fathoms, from a rocky 
bottom. Ciaparéde” also mentions it as occurring on the spines of 
Cidaris. The number of pairs of teeth to each spine of the oper- 
culum is not necessarily limited to two, as Claparéde seems to 
imply, and there may be as many as sixteen spines to the 
operculum. 
(b. Sabellides.) 
V1.—Dasychone Savignii, Johnst. 
There is one specimen which I venture to refer to this species, 
because as far as Johnston’s description” goes it agrees with it, 
and because the Dasychone argus, Sars (the D. Dalyelli, Koll.), to 
which Malmgren” refers it with a query, differs from it in having 
eyes on the branchiz. My specimen, like Johnston’s, has no eyes on 
the branchiz, and also, like Johnston’s, the branchie are longer in 
proportion to the body than they are in the Dasychone argus or the 
D. lucullana of Sars, to one of which species the Sabella (D.) bomby« 
of Johnston, from which he distinguishes his S. (D.) Savigni, 
probably belongs. (Malmgren unites all three species; Carus ” 
distinguishes two species—the D. lucullana of Delle Chiaje and 
Sars, and the D. polyzonos, Pane., including D. Da/yelii, Koll., and 
D. argus, Sars, but does not say to which he would refer Johnston’s 
D. bombyx). For the sake of clearness I have figured my specimen 
(figs. 10-12), and subjoin a specific diagnosis. 
Dasychone,* with branchize more than half the length of the 
19 Claparéde, Ann. Chet. d. G. d. Naples Suppl. p. 527, pl. xiv., f. 4. 
20 Johnston, ‘‘ Catalogue of Worms in the Brit. Mus.,” p. 261. 
21 Malmgren, Nordiska Hats. Annulater Ofvers, af. K. Vet. Ak. Férh. 1865, 
p- 403, and Annul. Polych., Jbid. 1867, p. 241. 
22 «Carus. Faune Mediterranex,’’ p. 272. 
23 It may be convenient to have the generic diagnosis at hand. I therefore quote 
the substance of that given by Carus :—Collar thin, divided into two halves; setigerous 
tubercles beginning on the collar segment, with winged capillary sete, long and slightly 
curved at the apex; uncinigerous tori beginning in the second segment, each bearing a 
