REPORT ON THE ANNELIDA. 
73 
Antinoe pulchella, from the moutli of the La Plata. The ventral branch has translucent 
pale straw-coloured bristles with simple hooked tips (PI. XIa. fig. 3), while beneath are 
a comparatively small number of spinous rows, which, indeed, somewhat approach the 
arrangement in Lepidasthenia ; and perhaps this form may also possess an elongated body. 
The superior ventral bristles have much longer tips than represented in the figure, which 
shows an average or intermediate specimen. 
This form approaches Lepidasthenia in the diminution of the dorsal bristles, and it 
does not seem to fall under Eiinoa. There is nothing in the description or figures of 
Schmarda’s Polynoe trochiscophoixP to connect it with the fragment from the Challenger. 
The ventral area between the oblique muscles is narrow, and the nerve-cords are of 
considerable size and ovoid in section. A few Loxosomce are |)arasitic on the dorsal 
aspect of the feet. 
Eunoa ahyssorum, n. sp. (PI. XIa. figs. 14—16). 
Hahitat. — Trawded at Station 160 (south of Australia), March 13, 1874 ; lat. 
42° 42' S., long. 134° 10' E.; depth, 2600 fathoms ; bottom temperature 33°'9, 
surface temperature 55°'0 ; red clay. 
Unfortunately the specimen has been dried, and all its scales are absent. It 
measures about 27 mm. in length, and including the bristles 13 mm. in breadth. 
The head appears to be devoid of eyes^ a common feature in forms from such depths. 
The cirri are of considerable length. There are thirty-eight bristled segments including 
those bearing the tentacular cirri, and the points of attachment of fifteen scales are 
indicated. 
Both sets of bristles are straw-coloured. The dorsal branch has a series of stiff, 
acutely pointed bristles, with the spinous region rather short, though the spines are 
distinct (PL XIa. fig. 14, which represents an average example amongst the longer 
kinds). The ventral bristles have a well-marked simple hook at the end of the 
smooth portion, and a comparatively short spinous region (PI. XIa. figs. 15, 16 — the 
former representing one of the longer, and the latter one of the shorter and smaller 
inferior forms). The smooth portion at the tip has a slight convexity on the anterior or 
spinous edge. 
The brownish debris in the intestine contained remarkable link-like spicular plates, 
as if pertaining to a fantastically armed Synapta. 
The advantage of having the assistance of the bristles in establishing an accurate 
diagnosis is weU seen in the case of this injured and dried form.^ 
1 Neue wirbell. Thiere, I. ii. p. 151, Taf. xxxvi. fig. 310. 
2 The Lepidonotus howerhanldi of Dr. Baird, from Australia, appears to approach this genus {Eunoa), having ventral 
bristles, with a simple hooked tip. The dorsal bristles again are slender, and the scales have cilia. 
(ZOOL. CHALL. EXP. PART XXXIV. 1885.) 
LI 10 
