12 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 123 



1 cf, 53.9; Vanikoro, Santa Cruz lis.; Templeton Crocker Expedition; 

 June 5, 1933; USNM 120265.— 19, 109.2; New Britain; Willey; 

 1895-1897; UMZ— 1 d\ 109.0; Blanche Bay, New Britain; A. Willey; 

 July 1895; BMNH 1918.2.25.1.— 19, 103.2; Ifaluk Atoll, Caroline lis.; 

 Abbott and Yaniseiman, No. 643; Oct. 19, 1953; USNM 104702.— 

 Id", 143.5; Wakanoura, Japan; Jordan and Snyder; 1900; USNM 

 26346. 



Description. — -Eye subglobular, cornea small, length greater than 

 width; eyes extend to or slightly beyond end of first segment of 

 antennular peduncle; anterior margin of ophthalmic somite truncate, 

 not noticeably projecting; ocular scales truncate, oblique to body 

 line, appressed along midline. 



Antennular peduncle shorter than carapace. 



Antennal scale large, ovate, not as long as carapace; anterior surface 

 of scale almost completely setose, anterior setae much shorter than 

 posterior; dorsal plate of antennal peduncle quadrangular, anterior 

 margin irregularly rounded or sub triangular. 



Rostral plate triangular, short, not extending anteriorly past 

 ocular scales; lateral margin rounded; apex may fit in space behind 

 ocular scales; apex sharp, depressed, anterior half or third sulcate. 



Carapace narrowed anteriorly, lateral plates projecting anteriorly 

 just past base of rostral plate. 



Raptorial claw stout; dactylus armed with 2-3 teeth, outer margin 

 of swollen portion flattened, smooth or irregular. 



Mandibular palp and 5 epipods present. 



Fifth thoracic somite lacking distinct lateral process, entire somite 

 usually concealed under carapace; lateral processes of next 2 somites 

 irregularly rounded, process of seventh more rounded than sixth; 

 ventral keel on eighth thoracic somite low, inclined posteriorly, 

 broadly rounded or obliquely truncate. 



Abdominal somites generally smooth; second to fifth with lateral 

 longitudinal groove originating from anterior pit, increasing in sharp- 

 ness posteriorly, upper and lower borders actually carinate on fifth 

 somite; third to fifth or fourth and fifth somites with posterolateral 

 spines, that of fifth somite largest, carinate; submedian, intermediate 

 and lateral carinae of sixth somite with posterior spines; submedian 

 carinae recurved posteriorly; prominent knobs present on anterior 

 half of somite between intermediate and lateral carinae; no spine in 

 front of articulation of uropod; ventral surface of sixth somite with 

 bilobed posterior margin, median emargination present between lobes. 



Telson broader than long, greatest width at apices of lateral teeth, 

 ornamented with carinae as follows: (1) median carina with short 

 posterior spine; (2) 2 pairs of accessory median carinae, inner longer, 

 which converge under posterior apex of median carina, outer accessory 



