314 TROCHIDA. 
T. seRPULOIDES, (Mont. certé) et nobis. 
2? Skenea divisa, Brit. Moll. iii. p. 161, pl. 74. f. 4, 5, 6; iv. p. 269. 
2? S. levis, Brit. Moll. iii. p. 165, pl. 88. f. 5, 6. 
I present an account of a highly important unrecorded 
animal, that has long been sought for, not only by the simple 
malacologist, but by the professors of the science, to settle 
the apocryphal family of the Skeneade. To show that its 
acquisition is very desirable, I need only mention that Pro- 
fessor Forbes did me the honour to request that I would 
include this minute creature in my researches, as he thought 
it would in all probability resolve a malacological problem. 
Animal inhabiting a discoid white shell of three spiral turns, — 
striated around the umbilicus of the body-volution with fine 
capillary lines, the upper part of the whorl being plain; it is 
pure hyaline-white, except the eyes and head-disk. The head 
is a rather long, broad, finely wrmkled proboscidal muzzle, 
with a vertical fissure, having a pale red or pmk disk, from 
whence the corneous jaws and lingual riband may sometimes 
be seen im action, but not so conspicuously as in the Rissoe, 
The tentacula are long, flattish, frosted on the central le, 
not irregularly setose at the edges, but most elegantly 
clothed, each on both sides, with 12-14 long hyalie cilia, 
arranged in symmetrical series, inclining obliquely from 
base to point, and diminishing in length in hke manner. I 
have never seen tentacula so elaborately adorned. The eyes 
are very large, black, and lateral, attached nearly at the 
external bases on round inflations to the main stems, there 
bemg no distinct pedicles: no head-lobes were detected. 
There are two neck-lappets of different form, the one on the 
right side bemg narrowish, flat, and semiserrated ; that of the 
columellar range is shorter, more suboval, and plain. The 
foot is subtruncate or subrotund in front, superficially labiated, 
forming at the angles long curved linear auricles, somewhat of 
the shape of the Murex varicosus (Nassa, nonnull.), but longer 
in proportion, thin at the edges of the sole, which is not 
fringed; it is moderately long and rather obtusely pointed. 
The operculigerous lobe is also plain, and of the same shape 
