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Show 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. sculptus were dredged in 25-35 fathoms, in various localities off the coasts of Durham and North Yorkshire. Genus RAPHIGNATHUS, Duges. (Leptognathus, Hodge.) R A P H I G N A T H U S F A L C A T U S (Hodge). (Plate XLII. figs. 7-10.) Leptognathus falcatus, Hodge, Trans. Tyneside N. F. C. vol. v. p. 302, pl. 16. figs. 6, 7. Length -^ of an inch : colour orange-brown. Body truncate 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 mandibles. Palps very long and slender, extending beyond the tip of the rostrum, and bearing towards the extremities a few fine setse. Legs of moderate and nearly equal length ; the joints not much differing 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 strise into four symmetrically arranged areolse-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 m y 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 Duges. 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. GAMASIDCE. Genus G A M A S U S , Latreille. G A M A S U S M A R I N U S , nov. sp. (Plate XLI. figs. 5-7.) Length -^ 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, |