298 
THE VOYAGE OE H.M.S. CHALLENGEE. 
Ev,nice hassensis, n. sp. (PL XXXIX. fig. 16 ; PI. XXIa. figs. 8, 9). 
Habitat. — Dredged at Station 162 (oflf East Moncoeur Island, Bass Strait, South 
Australia), April 2, 1874 ; lat. 39° 10' 30" S., long. 146° 37' E.; depth, 38 fathoms; 
surface temperature, 63° '2 ; sea-bottom, sand and shells. 
This fragment, consisting of about two inches of the tip of the tail and about two 
inches in front of it, seems to differ from any of the foregoing, and especially from 
Eunice <pycnobranc]imta, to which, perhaps, it appears to be most nearly related, by the 
very distinctly jointed dorsal cirrus (PI. XXXIX. fig. 16), which consists of four 
divisions. In the former species none are visible in cirri from the same region of the 
body. The branchiae are also larger, each having nine rather elongated pinnae, whereas 
Eunice pycnobranchiata has but three very thick lobes. The ventral cirrus is also 
more obtuse than in the latter species, the foot of which, moreover, has blackish spines, 
whereas they are golden in the present form. The branchiae are continued to the tip 
of the tail, being gradually reduced to a jingle short process. The caudal cirri are 
boldly segmented. 
The foot bears three long yellowish spines superiorly, and interiorly a long pale 
yellowish or golden hook (PL XXIa. fig. 9) with three distal processes, viz., a main fang 
and two sessile teeth superiorly. 
The dorsal bristles eonform to the usual type. The comjDound forms (PL XXIa. 
fig. 8) are characterised by a shaft devoid of superior striae, though it has the ordinary 
microscop>ic file-like markings (from minute spines). The tip is bifid, and there would 
seem to be less of the alteration in the proportion of the limbs of the fork than is 
generally found in the posterior region of the body. 
The fragment belongs to a female, and is distended with minute ova. These have 
a tough capsule. 
The intestine contains fragments of the chitinous fibres (root-fibres ?) formerly 
observed, branches of Polyzoan allied to Crisia, Ostracoda, and the usual sandy mud 
mixed with numerous sponge-spicules and Diatoms. 
In the form of the branchiae this species resembles Eunice quoya, Valenciennes 
(De Quatrefages).^ 
The nerve-area is somewhat trilobed in section, for there are two lateral and 
a smaller median lobe superiorly, but it is doubtful how far the state of the prepara- 
tion may be connected with this appearance. The neural canal is inferior. 
1 Aiineles, p. 318. 
