146 Prof. M‘Intosh’s Notes from the 
become less prominent and assume the condition seen in 
other forms. 
Every specimen represented only the anterior third or 
less of the body, so that it would appear to be a dweller 
in mud or in a tube. The presence of largely developed 
glands at the bases of the feet would also seem to show 
that a special secretion is furnished either for a tube or for 
lining a tunnel. 
The genus was established by Kinberg * from specimens 
procured off the coast of South America. All the species 
he and subsequent observers (Ehlers and Verrill) have 
described have been American. ‘This is the first appearance 
of the genus in European waters. Further remarks will be 
made under the Canadian examples. 
Lumbriconereis acutifrons, sp. n. 
Dredged in the ‘ Porcupine’ Expedition of 1870, though 
the locality is not stated. 
A small and imperfect specimen, distinguished by the 
attenuated conical snout (Pl. XII. fig. 29), which from a 
base of the normal breadth tapers to a delicate extremity. 
In lateral (profile) view it is even thicker at the tip than 
when seen from above, for the dorso-ventral flattening is 
less marked than in ordinary types. 
The body is very little diminished anteriorly, and remains 
of the same diameter to the fractured region, the whole 
measuring about three-quarters of an inch. The dental 
apparatus is of a translucent madder-brown hue by trans- 
mitted light. The maxille are somewhat broad posteriorly 
with a concave border, but taper in front to strongly 
curved and sharp points. Their posterior appendages are 
narrowed after the articulation, then expand into somewhat 
long processes, having a straight inner edge and a convex 
outer edge; the whole appendage is thus unusually long. 
The great dental plates appear to have six strong, recurved 
teeth, each of which is connected by a canal with a brown 
band externally. These correspond respectively with the 
central canal of the tooth and the layer of odontoblasts of 
the dental matrix of Pruvot and Racovitza +, as shown in 
their account of Lumbriconereis coccinea. In front the 
preparation showed only a single plate with a tooth. The 
translucent mandibles were ankylosed in front, then split 
into the oblique dental edge which was tipped externally 
# Annul. nova, Frege. Eugen. Resa, p. 566, Taf. xviii. figs. 32 & 33 
+ Arch. Zool. Expér. 5° sér, vol. ii, p. 880, woodcut, fig. 3, 
en ee a Te 
