1875.]  MR.G.S. BRADY ON BRITISH MARINE MITES. 307 
sculpture, as also a similar space situated posteriorly and surrounding 
the anus. The first, second, third, and fourth joints of the legs are 
also marked with pitted sculpture. 
Several specimens of P. seulptus were dredged in 25-35 fathoms, 
in various localities off the coasts of Durham and North Yorksnire. 
Genus Rarnicnatuus, Dugés. 
(Leptognathus, Hodge.) 
RaPHIGNATHUS FALCATUS (Hodge). (Plate XLII. figs. 7-10.) 
Leptognathus falcatus, Hodge, Trans. Tyneside N. F. C. vol. v. 
p- 302, pl. 16. figs. 6, 7. 
Length 54 of an inch: colour orange-brown, Body truneate above 
insertion of first legs. Head forming a broad subtriangular bulbous 
projection, from the front of which stands out a long, slender, bifid 
rostrum, between the valves of which, by pressure or dissection, may 
be discovered two slender, curved, unguiculate and protrusile man- 
dibles. Palps very long and slender, extending beyond the tip of 
the rostrum, and bearing towards the extremities a few fine sete. 
Legs of moderate and nearly equal length; the joints not much dif- 
fering in size, except the last, which is long, thin, and terminated by 
two simple claws ; thighs remote. Eyes three, one behind the base 
of the head, the others near the origin of the second pair of legs, 
Upper surface of the body divided by delicate furrows or striz into 
four symmetrically arranged areole—two lateral, one anterior, and 
one posterior. 
I have not been able thoroughly to satisfy myself as to the 
anterior eye spoken of by Mr. Hodge. I can find no trace of it in 
his type specimen ; but I think I can detect something like it in one 
of my own. However, Hodge’s description is so circumstantial that 
I conclude it must have been plainly visible in the fresh state of his 
specimen. I think there can be little doubt that the species is 
properly referable to the genus Raphignathus of Dugés. 
Mr. Hodge’s specimens were taken on the Durham coast in 
depths of from 20 to 30 fathoms. Several examples have been 
more recently dredged by Mr. David Robertson and myself on the 
same coast and also amongst the Scilly Islands in a depth of 10-12 
fathoms. 
Fam. GamMasiIpz&. 
Genus Gamasus, Latreille. 
GAMASUS MARINUS, nov. sp. (Plate XLI. figs. 5-7.) 
Length +4; of an inch: colour yellowish brown. Body regularly 
oval, beset with scattered hairs; thighs contiguous, springing from 
near the median line. The palpi are large and thick, 6-jointed, 
obtuse, recurved at the extremity, the last joint thickly beset with 
rather long hairs: the mandibles are (in the adult) longer than the 
palps, and end in two strong denticulated nipping-claws like those 
of the hand of a lobster; externally, between them and the palps, 
