CRUSTACEA. 
21 
pedum ceteris brevionbus; unguibus paululum curvatis, subelongatis, infra mmutirn serratis et inter 
serrationes setis circunidatis. 
Carapace as broad as long, subquadrilateral, smooth, without tubercles in the middle 
line, and produced and rounded posteriorly ; sides acute, with a single broad lobe, slightly 
emarginated posteriorly, horizontally undulated, arched anteriorly, depressed in the middle 
and raised behind. 
Front very wide, laterally dilated, obtuse and rounded anteriorly, considerably depressed, 
plane above, and inferiorly deeply channelled in the middle line. 
Fore-legs very small, about the length of the carapace, not thicker than the posterior 
pairs, third joint trigonal, the end, on the upper part, with a strong conical spine, and 
posteriorly, two smaller, vertical, conical spines on the keel, fourth joint keeled above, with a 
tubercular " spine on the upper and inner surface; fifth joint keeled above; claws slightly 
gaping, the upper one with a single spine a little behind the middle. 
Second pair of legs longer than the others, third joint trigonal, carinated above, with 
a single, strong, compressed spine at the end, and two smaller ones posteriorly, fourth joint 
winged above, carinated externally, and rounded below; fifth joint very much compressed, 
carinated above, keel with a single spine in the middle, and ending below in a strong, 
angular tooth ; third and fourth pairs of legs shorter than the others ; claws slightly curved, 
rather elongated, finely serrated below, and beset with hairs among the serrations. 
In the peculiar and characteristic form of the front and carapace, this species differs in a 
very remarkable manner from those varieties of Iluenia proteus, which are named var. elongata, 
heralclica, and tenuipes. The locality of the specimen described above, which is in the collec- 
tion of Crustacea in the British Museum, is unknown, but as all the others are natives of the 
Eastern Seas, the present species is most likely from the same part of the globe. The 
description is from a female. 
2. HUETsflA PROTEUS, 7)e Haan. Tab. IV. Fig. 4-7. 
Frontis margine inferiore acute, pedibus posterioribus margine anteriore valde carmatis. 
a. Mas. Thorace elongate, lateribus uni- vel bi-laciniato ; fronte valde products ; tlioraee longiore. 
(Max. elongata.) . , ,, T 
b Fem. Thorace dilatato, lateribus bi-laciniato; fronte dimidium thoracem vix superante. (Var. 
c Anteriore margine pedum postenorum paululum carinato; thorace subelongato; chclis gracilibus , 
inferiore margine frontis non tarn producto quam in reliquis varietatibus. (Var. tenuipes.) 
Hab. Maria Orientalia. 
Lower edge of front sharp, posterior legs with the anterior margin strongly carinated. 
a. Male. Thorax elongated, sides with one or two lobes ; front greatly produced, cara- 
pace rather long. (Var. elongata.) 
b. Female. Carapace dilated, sides with dilated lobes, front scarcely extending beyond 
half the length of the carapace. (Var. heralclica.) 
G 
