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Show 1906.] CRUSTACEA OF THE THIRD TANGANYIKA EXPEDITION. 197 two-thirds of length of carapace, length about one and a half times its depth. Rostrum (Plate XII. fig. 30) a little longer than antennular peduncle, equal to or a little shorter than carapace, nearly horizontal, teeth " 4J,~ ", those of dorsal edge rather long and slender, unarmed above for less than one-third of its length. Antero-lateral spine of carapace set close to front edge. Antennular peduncle distinctly shorter than antennal scale. Distal edge of scale (Plate XII. fig. 31) not projecting as far as the long external tooth. Third maxillipeds extending to end of second segment of antennular peduncle, terminal segment shorter than preceding. First peraeopods (Plate XII. fig. 32) short and rather stout, not extending beyond middle of first segment of antennular peduncle, breadth of carpus about three-fifths of its length ; chela about one and a half times as long as the carpus, about two and a half times as long as broad, palmar portion one and a half times as long as the fingers. Second peraeopods (Plate XII. fig. 33) hardly reaching to end of first segment of antennular peduncle, breadth of carpus less than one-quarter of its length ; chela little longer than carpus, more than four times as long as broad, palmar portion about equal to fingers. Third peraeopods reaching beyond, fifth pair falling considerably short of tip of third maxillipeds. Merus and carpus of last three pairs each with a single spine; dactylus a little less than one-quarter of length of propodus, that of fourth (Plate XII. fig. 34) with seven, that of fifth (Plate XII. fig. 36) with thirteen spines. Telson (Plate XII. fig. 37) a little shorter than sixth abdominal somite. Outer plate of uropods shorter than inner. Total length 12 m m . Eggs '26 x '17 m m. Remarks.-This species was twice found in company with L. spinipes, which it resembles in the rather short stout body, in the position of the antero-lateral spine close to the front edge of the carapace, and in having the outer plate of the uropods shorter than the inner. It differs in the shorter rostrum, in the short fingers of the first chelae, and in the presence of only one spine on the merus of the posterior legs. In the male, the spines on the dactyli of the third and fourth peraeopods are somewhat stronger than in the female (Plate XII. fig. 35). Occurrence.-Niamkolo Harbour, 7.ix.04. " Dredged in about 3 fathoms among shells." Many specimens. Utinta, 5.xii.04. " Dredged in about 10 fathoms among shells." One specimen. Kirando, l.xii.04. " Taken in about 8 fathoms of water, among shells." One specimen. LIMNOCARIDINA SPINIPES, sp. n. (Plate XIII. figs. 38-44.) Description.-Body stout; sixth somite of abdomen less than two-thirds of length of carapace, length about one and a half times its depth. Rostrum (Plate XIII. fig. 38) reaching to end of second segment of antennular peduncle, one-half to nearly two 14* |