234 REMARKS ON CONCIIOLOGY AND MALACHOLOGV. 
seen recent here, but the third closely resembles a small Melania 
common here in stagnant ditches, their size, number of whorls, 
and general shape are the same, and they have both deep longi¬ 
tudinal striae or furrows; some of the shells .were crystaline and 
amber coloured, though the material uniting them was of a uni¬ 
form grey colour, both substances however were soluble in Hydro¬ 
chloric acid. 
Of the numerous class of shells inhabiting the interior of madre¬ 
pores, wood, and stone, there is a species allied to 44 Pholas” which 
I cannot find described in any English work, though it seems to an¬ 
swer the description of the Genus Jounannetia of M. Des Moulins 
in a work entitled 44 Manuel des Mollusques par M. Sander Rang” 
the shell is white, rather less than a musket ball, and nearly as glo¬ 
bular in form, with a slight caudiform appendage at one end, striated 
obliquely and having accessory pieces, the consistence of the shell 
more resembles that of the bivalve of the 44 Teredo” than a Pholas 
and M. Des Moulins considers it to hold a place between these two 
genera. The specimens I have met with were in the interior of 
rolled masses of 44 madrepore” and were evidently old, as none con¬ 
tained the animal alive or dead. The 44 Lima” or the 44 file shell” 
of which several species are found in the Straits, much resembles 
the Genus “Pecten” or 44 Scallop shell” which is well known to pos¬ 
sess greater power of locomotion than most Bivalves. This power is 
possessed even in a greater degree by the Lima. When in the water 
its movements arc graceful, the two valves being used as fins by 
means of which it swims with considerable rapidity guiding itself 
by its numerous tentacula which are frequently of an oraDge colour 
and arranged not unlike the petals of a flower, the shell is less eared 
than the Scallop, and generally white, the valves do not entirely close. 
The Parmaphora or Duck’s bill Limpet is found here, though 
by no means a common shell, it is like a Patella flattened and 
elongated, the anterior edge always widely notched, < apex slight¬ 
ly recurved, length from one to two inches, colour white; the 
body, of the animal is much more bulky than the shell, and the 
mantle is so capacious that it covers the whole shell except the 
apex, which enables it in some degree to elude search, as it appears 
more like a pulpy or spongy mass than a shell; when touched, 
the mantle stains the hand a dark purple colour. 
