REPORT ON THE AMPHIPODA. 1463 



For the short definition of Eutyphis, see Note on Claus, 1879 (p. 490). Since Thyropus, 

 I >ana, clearly coincides, as indicated by Bovallius, with Tanyscdus, Claus, while Dithyrus, 

 Dana, is involved in much doubt (being considered by Bovallius to be the same as 

 Hemityphis, Claus, and by Claus himself to be the same as Eutyphis), the name Platy- 

 scelus remains as the earliest synonym of the preoccupied Typhis. It is unfortunate 

 that Platyscelus should come so near to two earlier names, Platyscelis and Platyscdum, 

 but it is not for all that the same as either. It has also the advantage of being 

 explanatory of the title Platyscelidse, which Claus has adopted for the group, at the 

 head of which this genus in right of priority may be considered to stand. 



Platyscelus ovoides (Risso?). 



1879. Eutyphis ovoides, Claus, Die Gattungen und Arten der Platysceliden, p. 9. 

 1887. „ „ Claus, Die Platysceliden, p. 35, Taf. i. figs. 1-11, Taf. ii. figs. 1, 2, 



Taf. iii. figs. 1-3. 



The depression in the front of the head between the eyes and the rostral triangle 

 not transverse as in Platyscelus armatus, but triangular. 



Eyes. — The lower division approaching the rostrum more closely than in the species 

 just mentioned. 



The Second Gnathopods, the Third, Fourth, and Fifth Perseopods, the Uropods and 

 Telson, as well as the general appearance of the specimen, agree so completely with 

 Claus' figures and description of Eutyphis ovoides, that, though its place of capture is 

 so distant from the localities hitherto recorded for the species, there seems no reason to 

 doubt the identification. The First Gnathopods were not examined. The third joint 

 in the first, second and third perseopods is here relatively much shorter than in the 

 species next described. In the Fourth Perseopods the middle part of the hind margin 

 is setuliferous, but this part is not straight, as it is in Thyropus ovoides, Spence Bate. 



Uropods.- — Peduncles of the first pair with the outer margin and outer part of the 

 distal margin pectinate, the outer ramus a little shorter and narrower than the inner, 

 having its outer margin pectinate, and the distal margin on the inner side of the minute 

 apex also pectinate, but much more finely ; the inner ramus has the margins pectinate 

 distally, more finely on the outer than on the inner side ; peduncles of the second pan- 

 very short, the outer ramus almost smooth, decidedly shorter and much narrower' than 

 the inner, the inner having its broad distal margin finely pectinate on either side of 

 the minute apex ; the third pair with the outer ramus much shorter and narrower than 

 the inner, not apically widened, pectinate near the apex, more on the inner than on the 

 outer margin ; the inner ramus coalesced with the peduncle, pectinate along almost all 

 the outer margin and on the lower part of the inner, apically acute though widened a 

 little above the apex, not reaching quite to the narrowly rounded apex of the telson. 



