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THE VOYAGE OE H.M.S. CHALLENGER. 
the proboscis. In the example from Station 76, the ventral area is much deeper and 
narrower, a feature, however, due to the condition of the opaque accessory regions above 
the nerves, the parts being minutely cellulo-granular in certain sections, while in others 
the spaces (canals ?) are distended with large elliptical corpuscles, the precise nature of 
which has not yet been determined, the narrow apex in all being completely occupied 
by the oblique and other muscles. The nerve-cords are somewhat ovoid, and have a 
neural canal at their inner border. The cuticle is very thin. The ventral longitudinal 
muscles are thicker and rounder in section, and the dorsal fold is thick, with a short 
point. The dorsal longitudinal muscles are also much thicker than in the former specimen. 
How far these characters are due to the difference of region would require to be 
ascertained, but they seem to be worthy of note. 
Leanira Icevis, n. sp. (PI. XX. fig. 4 ; PL XXIII. figs. 10, 11). 
Habitat . — Dredged in Queen Charlotte Sound, at a depth of 10 fathoms. 
The fragment appears to belong to a species of considerable size. The diameter, 
including the bristles, is 4 mm. 
The head has a long median tentacle, with the usual spathulate processes on each side 
of the base. Slightly external and posterior to the latter is a small black eye ; while on 
the smooth eminence on each side of the snout, immediately beneath the tentacle, is a 
much larger eye, the pigment of which is somewhat above the lenticular region. This 
seat of the eyes in the Leanirce seems to have been hitherto unobserved. The tentacular 
cirri are not so long as the tentacle. The palpi are rather less elongated than usual. In 
contrast with the species from the Gulf of St. Lawrence ^ alluded to formerly, the head 
of this form is somewhat smaller and more rounded, that in the former being transversely 
elongated. The first foot bears a tuft of very delicate iridescent bristles, which project 
conspicuously forward. 
The first and second scales are smaller than the succeeding, and all are delicate and 
translucent. They are perfectly smooth in outline and surface, the granules of the 
hypoderm alone showing by transmitted light (PI. XXIII. fig. 10). They meet in the 
centre of the dorsum in the preparation, after the termination of the proboscidian region. 
A well-marked granular ganglionic mass appears behind the umbilicus. There is little in 
the scales to distinguish this from the before-mentioned species. 
The superior division of the foot has a branchial process, the usual three dorsal pads, 
a number of long papillae on the inner side of the base of the dorsal bristles, and a much 
larger and slightly pedicled process beneath the latter. The dorsal bristles consist of the 
ordinary kinds, some having distinct whorls of spikes, others being almost smooth. 
^ Ann. and Mag. Nat. Hist., ser. 4, vol. xiii. p. 268, 1874. 
