i)ESCRlPTTONS OF NEW SPECIES OF HAWAIIAN CRABS. 



By Mary J. Rathbun, 



Second Assistant Curator, Division of Marine Inveriehrates. 



Mr. H. W. Henshaw, of Hilo, Hawaii, has from time to time sent 

 crustaceans to the U. S. National Museum. Among- them are two 

 crabs wliich appear to be undescribed. The species of Oyclograpsus 

 has since been taken also by Mr. R. C. McGregor. 



The tig'ures are drawn by Miss Sigrid Bentzon. 



CYCLOGRAPSUS HENSHAWI, new species. 



Carapace four-fifths as long as broad, sides subparallel for nearly 

 three-fourths of their length. Surface almost smooth, punctate, the 

 punctae coarse on the front, a few depressed granules in the antero- 

 lateral region; cervical suture and gastro-cardiac suture faintly 

 marked. Postero-lateral 

 region crossed obliquely by 

 broken granulated lines. 

 Margin of front not visible 

 in a dorsal view, straight, 

 about throe-eighths as wide 

 as carapace, granulate. 

 Lateral edges margined, 

 granulate, and entire. Al- 

 coholic specimens show 



*^ Fig. 1.— CYCLOGRAPsrs henshawi, male, X \\. 



six white spots on the an- 

 terior half of the carapace, one on either side of the gastric region 

 just in front of the middle and two farther forward, arranged trans- 

 versely nearer the lateral margin. 



Chelipeds subequal. Merus granulate on upper margin and spar- 

 ingly so on outer surface; inner margin denticulate, usually furnished 

 with a lobe on the distal half. Carpus for the most part smooth; inner 

 margin and angle granulate. Hand and fingers smooth; fingers gaping, 

 inner edges crenulate. 



The ambulatory legs are a little rough. The merus joints are granu- 

 late on the anterior margin, the granules continued sparingl}' on the 



Proceedings U. S. National Museum. Vol. XXVI— No. 1309. 



