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

;cHtrsTAcE.v. 227CRYPTOCCELOMA, gen, nov.Carapace transverse, nearly flat above, with the antero-lateralmargins much shorter than the postero-lateral, and forming withthe apparent frontal margin (as viewed from above) an unbrokencurve. Epistoma iiai'row-transverse. Palate or endostome withthe longitudinal ridges nearly obsolete. Orbits transverse, with themargins subentire, not visible from above, but concealed beneath theprojecting anterior margin of the carapace (see Plate XXIII. fig. A).Abdomen of female 7-jointed. The basal antennal joint reaches tothe subfrontal process, and partly occupies the inner orbital hiatus.Outer maxillipcdes with the merus-joint quadrate. Chelipedes subequaland of moderate size. Ambulatory legs compressed.63. Cryptocceloma fimbriatum. (Plate XXIII. fig. A.)Pilumnus finibriatus, M.-Eclwards, Hist. Nat. Crust, i. p. 416 (1834) ? ;Haswell, Cat. Austr. Crust, p. 66, pi. i. fig. 4 (1882).The carapace is transverse, its upper surface nearly flat ; the anterolateralmargins are much shorter than the postero-lateral, and armedonly with one or two inconspicuous granules or spinules ; the postero-lateralmargins are nearly straight, and slightly convergentposteriorly ; the upper surface is obscnrely granulated toward thelateral margins, and the cervical suture is faintly but distinctlydefined. The apparent frontal margin is thin, entire, and forms acontinuous and unbroken line with the antero-lateral margins, theorbits being altogether inferior. The margin thus formed is borderedwith a thick fringe of very close-set cinereous hairs, beneath whichare much longer hairs of a yellowish hue ; the real front, however,is narrow-transverse, nearly vertically deflexed, with its anteriormargin arcuated and having a small median notch. The eyes lieclosely within the transverse inferior orbits, whose margins arenearly entire. The epistoma is narrow-transverse ; very faint indicationsexist of longitudinal palatal ridges. All the segments ofthe postabdomen (which is rather narrow in the female) are distinctthe first segment only reaches to the bases of the fifth ambulatorylegs. The antennules are transverse ; the basal antennal joint justattains to the subfrontal lobe, and partly occupies the inner orbitalhiatus. The ischium-joint of the rather broad outer maxillipcdes iabut little longer than the merus-joint, which is nearly quadrate, butshallow-excavate at its antero-internal angle at the place of articulationwith the next joint ; theexognath is narrow, straight, and justreaches to the distal end of the merus. The chelipedes are subequal,the merus trigonous and very short ; the carpus granulated above,with a small tooth on its inner margin near the distal end, the outermargin fringed with very long fulvous hairs ; similar hairs borderthe upper surface of the palm and mobile finger ; the palm is granulatedexternally, and somewhat compressed ; fingers rather obscurelygranulated on their inner margins and acute at the apices, witha2