264 HERMIONE HYSTRIX. 



Achill Head, and recognised by Miss Florence Buchanan, 1 who thought it had hitherto 

 been procured only at Kerguelen ; but it and its varieties have a much more extensive 

 range, even to the shores of Nova Scotia, near Halifax. The varieties described in the 

 ( Challenger ' were devoid of eyes in the preparations, as this also is. 



Genus VII. — Hermione, Blainville, 1828. 



Cephalic lobe with a single tentacle and two palpi. Peristomium bears bristles and 

 two long cirri. Pedunculated eyes fixed to the margin of the cephalic lobe ; maxilke 

 absent or small (thickened processes). No dorsal felt. Elytra alternating with dorsal 

 cirri. Dorsal and ventral divisions of the feet distinct. Elytra-bearing feet with 

 glochidiate dorsal spines, and a tuft of strong bristles over the elytra. Ventral bristles 

 bidentate. 



The pregastric and intestinal casca are shorter than in Aphrodita, and even than in 

 Ldetmatonice, but they have large terminal dilatations. The latter are shorter than in 

 A. aculeata. The lateral casca do not approach the median line as in Lseimatonice. 

 Segmental papillse from the eighth to the twenty- ninth foot. Nerve-cords closely applied 

 and flattened. 



Heemione hystrix, Savigny, 1820. Plate XXIV, fig, 7. 



Specific Characters. — Head broad; each ocular peduncle bearing two eyes; facial 

 tubercle with globular or slightly ovate papillae. Body elongate-ovoid. Segments 

 thirty-two to thirty-three. Elytra somewhat reniform, furrowed by divergent and 

 transverse lines, and having large rounded cells. Dorsal spines glochidiate, with three 

 fangs on each side ; ventral bristles with a spur, and, in the anterior part of the body, 

 accessory spikes above it. The tip of the bristle is curved. 



Synonyms. 



1818. Halithea hysbrix, Lamarck. Hist, des An., s. v., vol. v, p. 307. 

 1820. „ „ Savigny. System, des Ann., Descr. de PEgypte, t. xxi, p. 345. 



1823. „ Delle Chiaje. Memorie, vol. i, p. 181, tav. iv, f. 10, 11. 



1826. „ hystrix, Eisso. I/Europ. Merid., p. 413. 



1828. Hermione hystrix, De Blainville. Diet, des Sc. Nat., ' vers/ p. 457, pi. ix, f. 2. 



1834. Aphrodita hystrix, Aud. and Ed. Ann. des Sc. Nat., vol. xxvii, p. 406, tab. vii, f. 1 — 9 ; and 



Annelides, p. 70, pi. i, f. 1 — 9. 

 „ „ „ Cnvier. Eegn. An., vol. iii, p. 207. 



1 c Sc. Proceed. Eoy. Dubl. Soc./ vol. viii, pt. 2, No. 15, p. 169, 1893. 



