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Show 196 DR. W. T. CALMAN ON THE MACRUROUS [Mar. 6, LIMNOCARIDINA LATIPES, sp. n. (Plate XII. figs. 23-29.) Description.-Body slender; sixth somite of abdomen a little longer than carapace, length two and a half times its depth. Rostrum (Plate XII. fig. 23) less than one-third of length of carapace, much shorter than first segment of antennular peduncle, horizontal, teeth ~ "t . Antero-lateral spine of carapace set a little way back from front edge. Antennular peduncle reaching to external tooth of antennal scale. Distal edge of scale (Plate XII. fig. 24) projecting beyond external tooth. Third maxilliped hardly extending beyond first segment of antennular peduncle, terminal segment two-thirds the length of preceding segment. First peraeopods (Plate XII. fig. 25) hardly reaching middle of penultimate segment of third maxilliped, breadth of carpus about one-half of its length; chela one and a half times as long as carpus, two and a half times as long as broad, palmar portion a little shorter than the fingers. Second peraeopods (Plate XII. fig. 26) reaching a little beyond first, breadth of carpus less than one-third of its length, chela a little longer than the carpus, four times as long as broad, palmar portion a little shorter than fingers. Last three pairs of peraeopods stout, third pair extending well beyond tip of third maxillipeds, fifth pair hardly reaching beyond base of penultimate segment of same. Merus and carpus of last three pairs each with a single spine; dactylus very short and broad, that of fourth pair (Plate XII. fig. 27) about one and a half times as long as broad, and one-fourth of length of propodus, armed with nine large spines; that of fifth pair (Plate XII. fig. 28) hardly twice as long as broad, a little more than one-fourth of length of propodus, with ten spines. Telson (Plate XII. fig. 29) little more than half the length of sixth abdominal somite. Outer plate of uropods a little longer than inner. Total length 9*7 m m . Eggs *25 x "16 m m. Remarks.-This small species is easily distinguished from the other members of the genus by its very short rostrum, and by the short and broad dactyli of the posterior peraeopods. The spines of the dactyli are unusually large, and do not differ in size in the two sexes. According to Dr. Cunnington's notes, the colour of this species in life was " greenish, with red and yellow spots." Occurrence.-Mbete, 29.ix.04. " Shallow water amongst rocks." Two specimens. Near mouth of Lofu, 6.X.04. " Taken on rocks, shallow water." Four females and eight males. Kalambo, 4.xi.04. " Tow-netting, 8.20 p.m." One specimen. Tembwi, 2.i.05. "Taken on rocks, shallow water." Five specimens LIMNOCARIDINA SOCIUS, sp. n. (Plate XII. figs. 30-37.) Description.-Body stout; sixth somite of abdomen less than |