282 
THE VOYAGE OE H.M.S. CHALLENGER. 
being curved and diminished to a blunt point. The inferior hooks (PI. XXa. fig. 7) have 
likewise thick shafts, while the tips are rather attenuate. Both the terminal and great 
fang are comparatively short. 
The intestinal contents consisted of various chitinous shreds, spinous in some 
cases, a few claws of minute Crustacea, numerous Diatoms and Eadiolarians. 
In transverse section no special feature occurs, except the dilatations of the neural 
canal. The nerve-area is moderate in depth. 
Grube^ meagrely describes from a figure of CErsted’s a species from Punta Arenas 
in Costa Eica, which is of an ochreous colour with whitish spots anteriorly, as if reticulated. 
The thick clavate and short tentacles are not articulated. The eyes are four. The 
dorsal cirri are not segmented and scarcely longer than the bristles. He again alludes to 
this form in his later remarks on the Eunicidm,^ referring especially to the club-shaped 
tentacles. He places the species, which he thinks had simple (cirrus-like) branchi^, under 
his third subgenus, Marpliysa, without the tentacular cirri on the buccal segment, a 
statement which at once distinguishes it from the present form. 
Eunice aphroditois, Pallas (PI. XXXVIII. figs. 16, 17 ; PI. XXa. figs. 8-10). 
Habitat . — Dredged off Port Jackson, Sydney, April 18, 1874, at a depth of 2 to 10 
fathoms ; and also procured between tide-marks at Samboangan. This fine species 
ranges throughout the Indian Seas, the first example having been brought to Pallas from 
the coast of Ceylon. The specimen measures about 230 mm., with a diameter, at its 
widest part, of nearly 1 2 mm. across the bases of the ventral cirri. 
In general appearance (PI. XXXVIII. fig. 16) it agrees with the description gAen hy 
Prof. Elders.^ Certain minute points in the anatomy, however, diverge, and hence it is 
necessary to go into details. Thus while the maxillse of this form (Fig. 41) agree in contour 
with the figure of tlie author just mentioned, there is in addition a prominent keel on the 
dorsal surface. The sharp inner edge does not show the slight denticulations noticeable 
in the large form from Samboangan. The maxillae in these large specimens do not seem 
to have much free motion, since they are clasped by external processes from the great 
dental plates. They appear to be less curved also than in the smaller forms. In the 
present example a calcareous (?) deposit occurs on the dorsal surface of the tip of the 
left maxilla. The left great dental plate has six teeth, and the same number occurs on 
the riglit ; whereas Ehlers gives four and five respectively as the corresponding numbers 
in Eunice aphroditois, Pallas. The left lateral paired plate has five denticulations, two 
of these being marginal (one at each end), and the first accessory lateral plate terminates 
superiorly in a long conical tooth. The left unpaired plate has seven teeth. Ehlers 
1 Ammlata ffirstediana, p. 60. ^ Schles. Gesellscli., 1877, p. 23. ^ Die Borstenwiirmer, Bd. ii. p. 306. 
