Report on the zoological collections made in the Indo-Pacific Ocean ...

;CEUSTACEA. 547also has a straight posterior margin to the carapace, but the posterolateralangles are not prominent, and the chelipedes are of verydifferentform ; these characters will also apply to P. carmata. Bell,and another apparently undescribed species in the Museum collectionfrom Peuang (Dr. Cantor), which is allied to P. carmata, buthas a more granulated carapace, a distinctly tridentate front, thelateral margins of the carapace bounded by a sharp cristiform linemarked at intervals bj- small granuliform teeth, and much slendererchelipedes, the palms of which are not distinctly granulated. Thisspecies, which only differs from Pseudophilyra in its less prominentfront, I will designate as Pliilyra rudis.68, PsendopMlyra polita. (Plate XLIX. fig. B.)In this little species the carapace is subrhomboidal, but (with thefront) much longer than broad, slightly sinuated at the hepaticregions ; the posterior margin nearly straight, but without prominentpostero-lateral angles, the antero-lateral margins with a seriesof very distinct granules, which is continued for a short distancealong the postero-lateral margins ; the posterior margin is definedby a minutely granulated line ; the frontal or cephalic region is veryprominent, the front obscurely trilobate ;the median lobe distinctand slightly deflexed, but the lateral lobes nearly obsolete ; thedorsal surface is polished, and only very minutely punctulated.There is no distinct thoracic sinus, but one or two tubercles nearthe base of the chelipedes. The postabdomen (in the male) has allthe segments (except the first and last) coalescent ; the eyes arevery small and lie well within the nearly tubular orbits, whichhave an external fissure and an internal hiatus for the reception ofthe small antennee. The outer maxillipedes have the merus as longas or rather longer than the ischium-joint, acute at its distal extremity,near to which its margins are granulated ; the exognathbroad, with its outer margin somewhat arcuated and its distal endobtuse, the margins granulated, except towards the base. Thechelipedes are rather short and somewhat triquetrous, with themargins very strongly granulated, as are also the upper and theanterior faces toward the base ; on the inferior surface of thearm the granules are smaller and more crowded ;palm and wristnearly smooth ; the palm subcristato on its upper and granulatedon its lower margin ;fingers about as long as the palm, slightlyincurved at the tips, with a slight hiatus between them when closed.Ambulatory legs with the merus-joints more or less distinctlygranulated on their lower margins. Colour (in spirit) yellowishwhite. Length of the only specimen nearly 4 Hues (8 millim.)breadth rather over 3 lines (7 millim.), which is also the lengthof the chelipede when extended as far as its conformation willallow.A male is in the collection from Poivre Island or He des Roches,dredged in 13-20 fms. (No. 183).2n 2