20 & BOVALLIUS, SYSTEMATICAL LIST OF THE AMPHIPODA HYPERTIDEA. 
two pairs of pereiopoda enlarged beyond the bases of the dactyli. 
Seventh pair longer than femur of sixth pair. Inferior margins 
of pleonal segments produced downwards into a spine. Last 
ural segment as long as telson. Rami of second pair of uro- 
poda serrated. ”Telson longer than last pair of uropoda. 
Hab. Atlantic, Mediterranean, Indian Ocean, Pacific. 
3. O. tuberculatus, SPENCE BaTtE, 1862. 
Catal. Amph. Crust. of the British Museum, p. 343, pl. 54, fig. 5. 
Diagn. Body tuberculated. Anterior corners of carpi of 
second pair of pereiopoda enlarged beyond the bases of dac- 
tyli. Four succeeding pairs subequal. Seventh pair shorter 
than femur of sixth. Inferior margins of pleonal segments 
even. Last ural segment longer than telson. Rami of se- 
cond pair of uropoda serrated. 
Hab. Cape of Good Hope. 
4. O. pectinatus, n. sp. 
Diagn. Body smooth. Head as long as pereion; rostrum 
as long as a third of the rest of the head, sharppointed. 
Inner margins of carpi and metacarpi of first two pairs of 
pereiopoda strongly pectinated. Seventh pair longer than femur 
of sixth pair, with a short metacarpus. Last ural segment 
twice as long as telson. ”Telson as long as last pair of uropoda. 
Hab. Subtropical parts of Atlantic, Indian Ocean. 
Hu. Oc JaAtirOStris,) CLAUS LlSv9: 
»Die Gattungen und Arten der Platysceliden.» Arbeiten aus dem Zool. 
Inst. der Universität Wien und der Zool. Station in Triest. Tom. 2, 
p. 193 (47). 
Hab. Lagos, South Atlantic. 
6. O. porcellus, Craus, 1879. 
»Die Gattungen und Arten der Platysceliden.> Arbeiten aus dem Zool. 
Inst. der Universität Wien und der Zool. Station in Triest. Tom. 2, 
p. 194 (48). 
Hab. Zanzibar. 
