WALKER—AMPHIPODA GAMMARIDEA. 305 
III. Suez Canal entrance: three. Suakim Harbour &e. 
A female with ova from Egmont measured only 4 mm., while one from Praslin 
measured 7°5 mm. 
25. Mera hamigera, Haswell. (Plate 48. fig. 5.) 
III. Suez, among coral: one ¢, length 7 mm. Khor Dongola: one ¢. 
Pleon segment 3: hind margin irregularly serrate, the angle acute and produced 
(fig. 5, pl.%). 
Antenna 2 considerably longer than peduncle of ant. 1; flagellum 9-jointed. 
Maxilla 1: inner plate with 3 sete. 
Gnathopod 1: side plate produced anteriorly, acute. 
Gnathopod 2: right hand smaller than left: dactylus in both acute (fig. 5, gn.?). 
Uropods 1 and 2 reaching a little beyond the end of peduncle of ur. 3. 
Otherwise agreeing with Haswell’s description. 
26. Mera tenella (Dana). 
bE Wasin.. ‘Three: 
To the description in Herdman’s ‘ Pearl Fisheries, Amphipoda, must be added :— 
Uropods. In a young specimen there is only 1 postero-dorsal tooth instead of 3, and 
the tooth on the 2nd segment is minute. 
Mandible contorted ; joints of palp straight, 2nd the longest. 
Maxilla 1: inner plate with 2 sete and a setule. 
Perzeopod 3 reaches a little beyond the 5th joint of per. 4; 2nd joint more than twice 
as long as wide, as long as 4th and 5th united, margins straight, narrowing slightly 
below, hind margin faintly serrate. 
Pereeopod 4 rather longer than per. 5; 2nd joint wider than that of per. 3 and more 
distinctly serrate. 
Perzeopod 5: hind margin of 2nd joint strongly serrate. 
Length 7 mm. 
All the perzeopods are more slender than in MV. inequipes, and the dactyli of per. 1 
and 2 want the secondary tooth on their inner margin as in the latter species. 
Genus ELASMOPUS, Costa, 1853. 
27. Hlasmopus subcarinatus (Haswell). 
I. Cargados, B 25, 22 fms. Thirteen: length of ¢ 5 mm. 
Gnathopod 2 ¢. The wrist and hand have an inflated appearance and are almost 
naked. It appears to be the form described by Chilton (Proc. Linn. Soc. N.S. Wales, 
vol. ix. part 4) under Mera petriei, which he identifies with this species ; it is probably 
a condition of immaturity. 
28. Hlasmopus rapax, Costa. 
I. Coetivy: several. Amirante: five. Diego Garcia: three. 
II. Zanzibar. Two g, length 7°5 mm. 
III. Red Sea (no locality): afew. Suez, coral: several. Suakim Harbour: one. 
