REPORT ON THE AMPHIPODA. H91 



inner ramus of the third pair of uropods is coalesced with the peduncle, as Claus figures 

 it, though he does not mention the circumstance in his description. In Amphithyrus 

 sculpturatus this ramus is free, and so also is it in Amphithyrus orientalis, though it is 

 not perhaps in either species very freely movable, its position under the telson making 

 such freedom not especially necessary. 



Length. — At full stretch the specimen would not have measured one-tenth of an inch, 

 and it was much less than this with the pleon flexed. 



Locality. — Atlantic, surface. One specimen, male. 



Family Scelid^e, Claus, 1879. 



The account which Claus gives of this family both in 1879 and 1887 is as 

 follows : — 



" Shape of the body and the antennae as in the Typhidas, the ventral surface however 

 generally strongly flattened ; the pleon relatively larger and more produced, flexing. 

 Lower antennas of the female well developed. Mouth organs outdrawn, beakdike, 

 mandibles narrow and elongate. The branchial vesicles are simple laminae. Laminar 

 first joint of the third perasopods ovoid, that of the fourth perasopods considerably longer 

 and more extended. Fifth perseopods feeble, but in general with the full number of 

 joints." 



Bovallius in 1887 changes the name of the family to Parascelidse, without, I think, 

 sufficient cause for the alteration. He gives the following diagnosis : — 



" Head large, a little deeper than the body, anteriorly produced downwards. The 

 eyes large, occupying the whole sides of the head. First pair of antennas fixed at the 

 under side of the head ; first joint of flagellum tumid, the rest of flagellum subterminal. 

 The second pair fixed at the under side of the head, angularly folded ($) or reduced (?). 

 Mandibles with palp. Femora of fifth and sixth pairs of pereiopoda [first joint of 

 Third and Fourth Perasopods] transformed into imperfect opercula. Seventh pair 

 ( Fifth Perseopods] not transformed." 



As regards the flagellum of the upper antennas, it may be observed that the 

 expression " subterminal " is not suitable to all the genera of the family, since in some 

 the second joint of the flagellum is attached at the apex of the first. The statement that 

 the mandibles have a palp is no doubt intended to apply only to the male. 



