332 MR. F. E BEDDARD ON THE ISOPODA COLLECTED [May 20, 



which project from the body almost at right angles with its long axis, 

 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. la this respect Serolis necera 

 resembles Serolis hromleyana. 



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 hromleyana ; 

 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 hromleyana. The eyes are large 

 and uniform, and distinctly faceted ; between their anterior extremi- 

 ties 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 hromleyana. 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 antcnnse are a trifle longer than the first pair. 



Station 320, 600 fathoms j 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 hrom- 

 leyana, but the anterolateral 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 



