SOLENICURTUS. 157 
tions of the foot and shell, from which its generic appellation 
originates. 
Some malacologists have an idea, that this creature, and 
that of S. candidus, is too large for its habitation; this is a 
mistake, which has arisen from the animal when in confine- 
ment exserting the belly of the mantle, inflated by water, 
beyond the margin of the shell; but the instant it is irritated, 
it can place every organ @ Vabri. S. candidus is in the same 
category as to this point. This account is partly from the 
recollection of twenty years ago; there are gaps in it which 
we hope to make good. We have, though rarely, taken this 
animal alive at Exmouth. 
S. canpipus, Renieri. 
S. candidus, Brit. Moll. 1. p. 263, pl. 15. f. 1, 2. 
Solen strigillatus, Anglorum. 
S. scopula, juv., Anglorum. 
We have been favoured by Dr. Battersby of Torquay with 
fresh, though not live, specimens of this species. To describe 
it would be nearly a repetition of the notes on S. coarctatus. 
The only variation in the animal is its being of a flesh colour, 
tinged with orange. We have rarely dredged the shells of 
this species, but never with the animal, in the coralline district 
at Exmouth. 
GASTROCH ANID Ai. 
Gastrochena, Saxicava, Panopea, and Venerirupis are the 
genera which receive the British species ; they are allied to 
Pholas, by being borers, except perhaps Panopea, and having 
their mantle closed; they have also a similar siphonal appa- 
ratus, which according to their minor volume is as propor- 
tionately elongated ; but most of them differ in having the 
siphons soldered together, showing externally a depressed line 
of separation, and have not the appearance of being enclosed 
in a common sheath. 
