ATYLIDAE 183 



Mandible, cutting edge divided into three teeth, bifid or with accessory denticles, 

 separated by deep incisions, no secondary cutting plate in either mandible, spine row 

 well developed, molar a thin tapering setose lamina, palp strong, 3rd joint abruptly 

 narrower than distal end of 2nd. Lower lip, inner lobes absent, outer lobes as in Epimeria 

 cornigera. Maxilla 1 as in cornigera, but palp stronger, 2nd joint ovate-oblong, with 

 eight clavate spines, and a slender spinule at each end on distal margin. Maxilla 2 as in 

 cornigera. Maxilliped, inner plate short, apically truncate, with a few setules, outer plate 

 very large, lamellate, inner margin with clavate spines which pass gradually into slender 

 spines distally, 2nd joint of palp with straight inner margin and quadrate inner apical angle . 



Gnathopods 1 and 2, 2nd joint with some fine setules on anterior margin and a few 

 longer setae on hind margin, 5th joint triangular, distally widened, 6th much narrower 

 than distal width of 5th and slightly shorter, palm oblique, ill-defined, except by very 

 fine pectination, dactyl with setules on inner margin. 



Peraeopods 3 and 4, 2nd joint evenly oval. Peraeopod 5, 2nd joint oblong, anterior 

 margin convex, hind margin slightly concave between the upper narrowly rounded 

 angle and the lower, more broadly rounded angle which is obscurely serrulate. 



Uropods somewhat mutilated but corresponding with Chilton's description. Peduncle 

 of uropod 3 keeled on both outer and inner upper margins, each keel ending behind in 

 a short acute tooth. 



Remarks. This specimen was at first thought to be a small example of A. australis, 

 Chilton, 191 2. A specimen of what is undoubtedly the true australis, however, has 

 been studied by Schellenberg, who finds that it is an Iphimediid, and for it has 

 instituted the genus Iphimediopsis (193 1, pp. 126, 127, pi. i, fig. c). 



The dorsal armature, except for a very slight difference in the shape of the hinder 

 part of the keel on pleon segment 4 is the same in both species ; and in other respects 

 there is great similarity. The main differences as noted above are the shapes of the 5th 

 joints of the gnathopods, and the 2nd joints of peraeopods 3-5, and the telson. Chilton 

 figures the hind margin of the 2nd joint of the gnathopods as markedly spinose, and the 

 5th joint as cylindrical; his description of the telson as " . . .emarginate posteriorly" 

 scarcely fits the present specimen. The palp of the maxilliped appears to be longer; the 

 figure here given is drawn from the mounted flattened preparation. 



It should be remembered that the Scotia specimen of australis was 35 mm. in length 

 and Schellenberg's ovig. $ 45 mm., whereas the present one is much smaller. It is 

 preparing for ecdysis, as the new skin can be seen within the old in the mandibles and 

 other parts. The brood lamellae are well developed though without marginal setae. 



Stebbing, 1906, p. 327. 



Family ATYLIDAE 

 Genus Nototropis, Costa. 



Stebbing, 1906, pp. 329, 728. 

 Schellenberg, 1925, p. 148; 193 1, p. 167. 

 Barnard, 1930, p. 382. 



