144 Part III—Twenty-third Annual Report 
Fam, STENHELIIDA. 
Genus Stenhelia, Boeck (1864). 
Stenhelia pygmea, Norman and Scott. 
1905. Stenhelia pygmea, N. and §., Ann. and Mag. Nat. His. (7), 
vol. xv., p. 284. 
This small species has recently been noticed in a gathering of Crustacea 
collected at Station II., Firth of Forth, on December 26, 1894.* It 
was described by Norman and Scott from a specimen dredged near 
Eddystone Lighthouse by Rev. Canon A. M. Norman.t 
S. pygmea is one u the smaller species belonging to this genus, and 
measures only about 7, of an inch in length; it appears to differ from 
other described aah Oe the peculiar structure of the antennules and of 
the first pair of swimming feet, and by the form and armature of the fifth 
pair. 
Genus Ameira, Boeck (1864). 
Ameira elegans, sp. n. Pl. x., figs. 18 and 19; pl. xi., figs. 1-9. 
Description of the Female.—The body, which is moderately elongated 
and slender, has a general resemblance to Canthocamptus palustris, but 
it is rather less robust and somewhat smaller; the specimen figured 
measured only ‘7mm. (nearly =, of an inch) in length (pl. xi., fig. 1), 
Antennules moderately elongated, eight-jointed, and sparingly seti- 
ferous ; the second joint is considerably longer, and the fifth and seventh 
smaller than the others (pl. xi., fig. 2). The formula shows the lengths :— 
Proportionate length of the joints, 18 : 23 + 14:15.9:10:7: 11 
Number of the joints, - - “1. BF Barcf) Biota’ hee 
The antenne (posterior antenne) are moderately large, and are each 
furnished with a small uniarticulate outer ramus bearing a few apical 
sete (pl. xi., fig. 3). 
Mandibles narrow, oblong, masticatory end obliquely truncated. and 
armed with small teeth ; mandible palp small, the basal part furnished 
with two setz at the extremity—one being stout and spiniform, and one 
plumose—and a small uniarticulate branch bearing a few sete is 
articulated to the distal half of the basal part (pl. xi., fig. 4). 
The second maxillipeds are stout, and armed with a moderately long 
terminal claw (pl. x., fig. 18). 
The swimming feet resemble those of Canthocamptus palustris, but 
differ in a few minor particulars, as shown by the drawings. In the first 
pair, which are moderately stout, the first joint of the “inner branches 
reaches to slightly beyond the end of the outer branch, the next two 
joints are short, but the end joint is rather longer than the other ; in the 
outer branches the middle juint, which is slightly longer than the first or 
third has asmall spine on the inner distal angle ; all the three joints have 
the usual marginal spines—one on each of the first and second joints, and 
three spines and two setz on the lower half of the outer margin and end 
of the third joint (pl. xi., fig. 5). 
In the second, third, and fourth pairs the inner branches are all shorter 
than the outer. The middle joint of the second pair bears a single setz 
on the inner distal angle ; but the end joint, which is rather longer than 
* This gathering was only partially examined at the time it was collected, and it has 
not even yet been exhaustively dealt with. 
+ Cf. Ann. and Mag. Nat. Hist. for March, 1905, p. 284, 
