CRUSTACEA. 21 



pedum ceteris brevioribus ; uiiguibus paululum curvatis, subelongatis, infra minutim serratis et inter 

 serrationes setis circumclatis. 



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 ; thud 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 Huenia proteus, which are named var. elongata, 

 heraldica, 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. HUENIA PROTEUS, Be Earn. Tab. IV. Kg. 4-7. 



Frontis margine inferiore acuto, pedibus posterioribus margine anteriore valde carinatis. 



a. Mas. Thorace elongato, lateribus uni- vel bi- laciniato ; fronte valde producta ; thorace longiore. 

 (Var. elongata.) 



b. Fern. Thorace dilatato, lateribus bi-laciniato ; fronte dimidium tlioracem vix superante. (Var. 

 heraldica^ 



c. Anteriore margine pedum posteriorum paululum carinato ; thorace subelongato ; chelis 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. heraldica.) 



G 



