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Show 332 MR. F. E BEDDARD ON THE ISOPODA COLLECTED [May 20, which project from the body almost at right angles with its long while in the females their direction approximates more nearly to that of the sixth pair of epimera, which pass backwards almost parallel to the long axis of the body. In this respect Serolis neara resembles Serolis bromleyana. The cephalic shield has its anterior margin produced into a short rostrum, and at some little distance from the anterior edge there is a ridge passing across from side to side exactly as in Serolis bromleyana ; the lateral parts of the cephalic shield are not, however, so markedly prolonged as in the latter species; in other respects the cephalic shield differs greatly from Serolis bromleyana. The eyes are large and uniform, and distinctly faceted ; between their anterior extremities are two pairs of flattened spine-like projections directed backwards, the outer one on each side being broader and slightly bifid at the tip. The hinder margin of the cephalic shield is indented, and forms three projections, the two outer ones being somewhat triangular in shape and tuberculated on the free margin, and the inner median one transversely elongate and much like the labium in shape, with a slightly convex outer margin. The epimera are long and spine-like, as in Serolis bromleyana. The epimera of the first thoracic segment are divided into two by a ridge which passes outwards and slightly upwards; the other epimera gradually increase in length up to the sixth, which is by far the longest; the epimera of the second abdominal segment extend considerably beyond the termination of the caudal shield ; while those of the third segment only reach as far as the commencement of the lateral margin of the caudal shield; the outer margin of the former is slightly denticulate. The thoracic segments are furnished with a backwardly directed median spine, which is largest upon the first three segments and almost disappears on the first two abdominal segments. The caudal shield is very closely similar to that of Serolis schythei; at the upper end is a flat triangular spine, and between this and the posterior margin of the shield another smaller spine; on either side of the latter, and connected with it by a ridge, are two small spines, above which and rather to the outside is another short spine on each side continuous with a long ridge passing upwards and inwards, until it nearly reaches the lateral termination of the large anterior spine. The second pair of antennae are a trifle longer than the first pair. Station 320, 600 fathoms; Station 318, 2040 fathoms. 3. SEROLIS GRACILIS, n. sp. Three examples of this species were dredged off Pernambuco, from a depth of 675 fathoms ; they are all males. The largest specimen measures 11 millim. in length by 12 millim. in breadth. The cephalic shield is almost exactly like that of Serolis bromleyana, but the antero-lateral portions do not project so far forward ; the eyes are small and inconspicuous, whitish in colour. The epimera are well developed, but are more sickle-shaped and |