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Show 202 DR. W. T. CALMAN ON THE MACRUROUS [Mar. 6, distal spine reaching middle of second segment. Antennal scale (Plate X I V . fig. 59) little more than half length of carapace, external spine not reaching beyond distal margin. Third maxillipeds reaching a little beyond tip of antennal scale, terminal segment a little longer than preceding. First and second peraeopods not dissimilar in shape and size'; first pair (Plate X I V . fig. 60) hardly extending beyond penultimate segment of third maxillipeds. Carpus of first pair nearly three quarters as broad as long, less than half length of chela; that of second pair (Plate X I V . fig. 61) hardly longer than broad, about two-fifths of length of chela. Third peraeopods (Plate X I V . fig. 62) stouter than the following ; merus with four spines on distal half of lower edge; propodus more than half as long as merus; dactylus, including terminal spine, a little more than one-fifth of propodus, with three spines on its lower edge. Fifth peraeopods (Plate X I V . fig. 63) with propodus longer than merus; dactylus, including terminal spine, about one-fourth of propodus, with about 43 spines on lower edge. Total length, female (not ovigerous) 13'5 m m. Occurrence.-Mbete, 1.x.04. " Taken on rocks, shallow water." Many specimens. Near mouth of Lofu, 6.x.04. " Taken on rocks, shallow water." Many specimens. Kala, 19.xi.04. "Taken on rocks, shallow water." One specimen. A very small specimen taken in a rock-pool at Kasakalawe, 4.viii.04, is referred with some doubt to this species. ATYELLA LONGIROSTRIS, sp. n. (Plate XIV. figs. 65-72.) Description.-Rostrum (Plate XIV. fig. 65) about five-sixths of length of carapace, equal to or a little longer than antennular peduncle, nearly horizontal, teeth + „ 1\ unarmed above and below for one-third of its length from tip, teeth on upper edge becoming long and slender anteriorly. Antennular peduncle (Plate X I V . fig. 66) a little longer than antennal scale, first segment less than second and third together, external spine of first reaching beyond end of segment, distal spine reaching to end of second segment. Antennal scale (Plate X I V . fig. 67) about three-fourths of length of carapace, external spine hardly reaching beyond distal margin. Third maxillipeds not quite reaching tip of antennal scale, terminal segment equal to or a little longer than preceding. First and second peraeopods similar to those of A. brevirostris; carpus of first pair (Plate X I V . fig. 68) five-eighths as broad as long, about half length of chela; that of second pair (Plate X I V . fig. 69) nearly three-quarters as broad as long, less than half as long as chela. Third peraeopods (Plate X I V . fig. 70) considerably stouter than the following; merus with five stout spines, of which the first is one-third of length of segment from its proximal end; propodus less than two-thirds of length of |