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sand. Pressed flat against the rock are seen various animals. Some 
of these, of course, are marine animals, such as small Crabs, Anne- 
lids, and Nemertines. Others, however, are Tracheates. These 
are two Beetles, viz.: Aépus marinus (Strom), and Micralymma 
brevipenne (Gyll.), the curious blue Axurida maritima, which 
occurs in thousands, and Odzstum maritimum. The last are 
somewhat gregarious; when one is found, others are usually 
near; four or five examples may be found on a square foot of 
rock occasionally. They sometimes inhabit crevices deep in the 
rock, occurring at a depth of eight or nine inches; but they are 
also found quite near the surface. Although of such submarine 
habits, they are quite unable to support themselves in the water ; 
and float abcut very helplessly if placed in that element. Under 
one piece of rock two small white cocoons were found. These 
were lenticular in shape, and about one-third-of-an-inch in 
diameter. One of them contained a cast skin of Obisium. The 
cuticle of the Pedipalps was very visible, the rest being reduced 
to débris. The other cocoon, which was placed close to the 
first, contained a pair of the Chernetids. One I think had just 
entered it, perhaps from the other cocoon. Several specimens 
of this Arachnid were observed to have seized an Anurida in 
their pedipalps; and, probably, this animal is their chief food. 
The flat shape of the O. maritimum is well adapted for living 
in such narrow fissures, where, probably, its enemies cannot 
follow it. In the same situations I also found a small mite, 
which I have not yet had identified. 
Obisium muscorum (Leach). A very young example attached 
to the leg of a house-fly in August. Chester. 
Roncus lubricus (1. Koch). One example; Hastings; MR. 
BENNETT. 
Roncus Cambridgii (I. Koch). Mr. BAGNALL, obtained a 
single example amongst moss, in Glen Ashdale, Arran. 
Chelifer Latreillit (Leach). MR. BENNETT obtained this 
species at the roots of grass on sandhills near Hastings. It 
was not uncommon. 
Chernes nodosus (Schranck). Two examples attached to the 
legs of house-flies in August. Chester. 
Chiridium museorum (Leach). Mr. J. C. VARTY-SmITH, of 
Penrith, kindly sent me three examples of this species. They 
were obtained from starlings’ nests by MR. BRITTEN, of that town. 
