110 THE HON. P. A, METHUEN ON A 



fourth joint of the maxilliped is present. Gnathopod I not so 

 long as gnathopod II and not stronger ; fifth joint strong and 

 swollen. 



TaLITRIATOR EASTWOODS, sp. n. (Pis. X. & XI.) 



Length, not counting antennte, with pleon bent 7*2 mm. ; no 

 striking difference between the male and female. 



Antennule (PI. X. fig. 1). — The third joint slightly the longest. 

 On the surface each joint carries distally two fairly long bristles. 

 On the upper surface opposite the ventral groups of setae are 

 groups of bristles, shorter than those borne ventrally, each group 

 either of two or three bristles ; on the basal joint a single bristle. 

 The last segment, which is very short, carries two stiff bristles. 

 The number of segments is nine or ten. 



Antenna (PL X. fig. 2). — Penultimate joint of peduncle is 

 nearly twice the length of the proximal joint ; the distal neai-ly 

 twice the length of the penultimate. All the segments of the 

 flagellular part are provided distally with a whorl of bristles, 

 there being four groups generally to each segment, three bristles 

 to each group. The last segment ends in a compact group of 

 fine bristles. 



Upper lip (PI. X. fig. 3) rounded, with numerous hairs at 

 the extremity. 



Loiver lip (PI. X. fig. 4). — The lobes with long and short setse ; 

 the mandibular processes, which are fairly well developed, possess 

 minute sette. 



Mandible. — Palp absent : otherwise normal. 



Maxilhda. — Much as in Tcditrus, with nine claw-like toothed- 

 bristles — five larger and four smaller — furnishing the outer plate. 

 The inner plate with two setose spines, and a few hairs proximally 

 along the inner margin. The palp exceedingly small, with hairs 

 on outer margin ; it is apparently two-jointed, the distal joint a 

 minute glabrous blunted spine. 



Maxilla. — As for Talitrios locusta, normal. 



Maxilliped (PI. X. fig. 5). — Inner plates are remarkable in 

 that they are furnished with three glabrous acorn-shaped processes 

 on each side ; they bear also a number of setose spines. The 

 palp is four-jointed. 



Gnathopod /(PI. X. fig. 6). — Coxal plate narrow, with a few 

 spines of unequal size on the ventral margin ; the other six joints 

 armed with a few spines on both margins, longest on the fourth 

 joint. Fifth joint swollen. Sixth joint with six stout, slightly 

 curved spines on the posterior margin and one slightly smaller 

 than the other six, together with small bristles at the base of 

 most of these spines. 



Gnathopod II (PI. X. fig. 7). — Coxal plate excavate behind 

 with conical projection ; lower border armed with short stout 

 spines. The second joint is not swollen or expanded ; it is much 

 longer than any of the other joints. The third joint is nai-rower 

 than the second, slightly SAVollen about the middle of anterior 



