2B8 
THE VOYAGE OF H.M.S. CHALLENGER. 
The head presents the usual conical shape, and is without trace of eyes. The proboscis 
is extruded (PL XXXVII. fig. 5). 
The body tapers distinctly anteriorly, remains about the same diameter some distance 
behind the anterior third, and then probably tapers toward the tail, but as the specimen 
is incomplete posteriorly, the condition of the tail is doubtful. The segments are 
comparatively distinct, and their antero-posterior diameter is considerable. Two clear 
segments exist in front, as far as can be made out, for the feet are indicated only by a 
minute papilla and a microscopic spine and group of bristles. The foot (PI. XXX. 
fig. 10) quite differs from that of Notocirrus scoticus in having a much smaller dorsal 
process or cirrus, and the bristles with wings have much more slender tips. As a rule, 
about four spines are included in the foot, at the base of the long bristles. In their 
ordinary position in the animal, the bristles are in front of the papilla. 
The dark brown dental apparatus (Fig. 3) appears to be allied to that in Arabella. 
The maxillae are abruptly curved or hooked anteriorly, and their base is armed with 
three curved teeth, the points of which are directed backward. The 
representative of the great dental plate has only three long curved 
teeth. Three processes exist in front of the latter. The first and second 
carry a single tooth, the first being the smaller. The third carries a long- 
tooth and two minute points on a process at the base. From the posterior 
end of the maxillary region a narrow horny rod passes backward a short 
distance, and then splits into two long processes. The mandibles are absent. 
Unfortunately the teeth of this form are so injured that only an idea 
of them is obtainable from the accompanying woodcut. 
This appears to agree in general structure with Webster’s species, 
though, probably from the imperfect condition of the specimen posteriorly, 
none of the feet showed the bifid condition, which the American author 
found only in the posterior third of the animal. Webster’s specimens 
were found abundantly in mud and sandy mud at low water on the 
Virginian coast, so that the bathymetrical range of this species is very 
considerable. It is noteworthy that this example had no mandibles. 
Webster found considerable variety in this respect. The same author 
observed that the anterior dental plates have only a single sharp, 
curved tooth, but in the present example the posterior (second) has three teeth. 
Webster placed the form under the genus Drilonereis of Claparede,^ but the latter 
differs in certain essential respects in regard to the structure of the foot, which agrees 
more with the typical Lumbriconereidse, and in the smooth condition of the bases of 
the maxillae. The statement of Kinberg,^ “ Radix tertia radicibus binis solitis brevior,” 
^ Annel. Ch4top., Naples, p. 144, and Supplement, p. 35, pi. ii. fig. 4. 
2 Ofversigt k. Vetensk.-Akad. Fdrhandl., 1864, p. 573. 
Fig. 3.— Dental ap- 
paratus (injured) 
of Laranda longa, 
(Webster) ; x 55 
diameters. 
