A.MPBIPODA. 265 



epimeral margin of the 3rd pleon segment faintly crenate (fig. 23. pi. 3 ), a dorsal carina 



on the Lst urus segment ; bhe 3rd joint of the last 3 pairs of perseopods about as 

 wide as long and very convex behind ; the rami of the 3rd uropods unequal, the outer 

 being much the Longer and with a terminal joint (fig. 23. ur.). In spite of these very 

 considerable differences, 1 am disposed to think that sexual maturity has here 

 preceded that of the integument and limhs, which probably require another moult or 

 two to bring them to the fully adult form. I believe this to be a not uncommon 

 condition in the Amphipoda, and one that accounts for a good many so-called species. 

 At the same time it must be admitted that the changes required t<> make this form 

 identical with E. ccesaris are great, and it would almost seem as if it were passing 

 through a Lvsianassid form; the 3rd perseopods with their bi-lobed side-plates larger 

 than the wide lst joint (fig. 23. pp. 3 ) ; their shortness compared to the next 2 pairs, 

 and the structure of the 3rd uropods reminding one of Orchomene. On the other 

 hand, the fore part, including head and mouth organs, is distinctly Eusiroides. On 

 the whole, I have thought it advisable to record this as a new species, which I would 

 call E. orchomenipes. 



Paratylus, G. < >. Saks, 1894. 



Paratyhis granulosus, n. sp. 



( 'I leva 1 Paar, 8 specimens. 



Body moderately compressed, the whole integument granulose. Second pleon 

 segment with a shallow carina slightly produced behind ; 3rd segment with a deeper 

 carina produced in an acute tooth. 



First segment of the urus as in P. vedlomensis (Sp. Bate), i.e., with a small 

 setiferous tooth, a deep depression, and a large arched and pointed hood-like process. 

 Second segment elevated behind. Third peraeopods with the 1st joint considerably 

 wider than in P. vedlomensis. 



Length of male, 4 millims. ; female, with ova, rather smaller. 



In other respects the animal closely resembles P. vedlomensis. 



Dexamine, Leach, 1814. 

 Dexamine serraticrus, n. sp. Plate IV., figs. 24. 



Cheval Paar, 1; Talaivillu Paar, 1. Length 3 millims. 



Head as long as the first 3 segments, with a distinct rostrum. Eyes very large, 

 roundish oval, dark ; ocular lobe rounded. 



Mesosome segments increasing in length successively. Pleon segments carinate, 

 the carinas produced behind as in D. spinosa (Mont.). Hind margin of the 

 3rd segment concave, the angle produced and upturned. First segment of urus with 

 a prominent carina. 



Antennae subequal, not half as long as the body, like D. spinosa. 



2 M 



