W. C. M‘SINTOSH ON BRITISH ANNELIDA. 387 
area. The aspect of the dorsum is greenish brown. The tentacle is madder brown. 
The fifteen pairs of scales have brownish pigment toward the inner edge; and in 
the centre of each is often a yellowish speck, best marked posteriorly. The cirri 
are very finely tapered. The dorsal branch of the foot bears a series of bristles with 
very distinct spinous rows (Pl. LXX. fig. 1), with a short tip, the ventral edge show- 
ing a differentiation as in the figure, which represents one of the stouter examples; 
the more slender forms have the spinous rows even more widely separated, ‘The ventral 
division has superiorly bristles with long bifid tips (Pl. LXX. fig. 2), the latter, as usual, 
becoming shorter and stouter in the inferior series (as in fig. 3—from the middle of the 
tuft). A few at the ventral edge have simple tips, without the secondary process. Ina 
large example from Herm the tubercles on the scales are most conspicuous clavate organs, 
yery much more developed than Malmgren shows; they are pyriform, with tubercles 
on the summit. A large specimen, again, dredged by Dr. Gwyn Jeffreys off Valentia 
had no tubercles on the scales. There is, indeed, considerable variation; for some of 
those from Herm have shorter cilia on the scales with more distinctly globular heads, 
and the dorsal bristles are smaller. The entire animal has a rougher aspect than 
H. imbricata, and is much more lively and active, as well as more irritable, frequently 
breaking in pieces if molested. It is a graceful species from its taper form and the 
long caudal styles. The Polynoé reticulata of Claparéde* is in all probability this 
form; and the Polynoé spinifera of Ehlers is closely allied, 
Lani.ua setosissiaa, Savigny®. This would appear to the Polynoé longisetis of 
Grube* (and, as such, mentioned in the Trans. R. Soc. Edin. vol. xxv. pt. ii. p. 408, 
pl. 15. fig. 3), the Harmothoé malmgreni, E. R. Lankester, and the Lenilla glabra, 
Malmgren*. The P. levigata of Claparéde’ is probably the same form. It occurs 
generally round the British shores. The ventral bristles are sufficiently characteristic 
when contrasted with those of H. imbricata. The dorsal are also much longer, have 
closer rows of spines, and a differently formed smooth tip. Savigny indicates most of 
the characters, such as the much larger anterior eyes and the light golden bristles ; 
and M. de Quatrefages makes the diagnosis more evident by finding bifid inferior 
bristles in a large specimen. 
ANTINO# FINMARCHICA, Mgrn. Dredged off the west coast of Ireland in the ‘ Porcupine’ 
Expedition of 1869. 
HERMADION ASSIMILE, n. s. First found at St. Andrews, afterwards on the west coast 
of Ireland, south of England, and off the Spanish coast in the ‘ Porcupine’ Expedition. 
‘ Supplément, Annél. Chet. Nap. p. 10, pl. 1. f. 1, 2 Syst. des Annélides, p. 25. 
* Archiy f. Naturges. xxix. p. 37, taf. 4. f. 1, 1863, 
* Annulat. Polycheet. &e. p. 12. ° Supplém. Annél, Chét. p. 14, pl. 1. f 3. 
VOL, 1X.—PaRT vu. January, 1876, 3G 
