18 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 119 



MoRPHOTYPE MALE, FORM II.— Differs from the holotype as follows: 

 Cephalic section of telson with three spines in right and two in left 

 caudolateral corners. Minute spinelike tubercle on left side of cara- 

 pace immediately caudal to cervical groove. Areola with seven 

 punctations across narrowest part. Inner margin of palm of chela, 

 with a row of six squamous tubercles; opposable margin of immovable 

 finger with 17 tubercles and that of dactyl with 19. Upper distal 

 portion of merus with two tubercles and lower surface with a mesial 

 row of ten tubercles. Hooks on ischiopodite of third pereiopods much 

 reduced in size. First pleopod without corneous elements (figs. Id, e) ; 

 swollen prominence of fourth pereiopods smaller. 



Allotype female. — Differs from the holotype as follows: Areola 

 with five punctations across narrowest part. Opposable margin of 

 immovable finger of right chela with 13 rounded tubercles, and that 

 of dactyl with 15. Upper distal portion of left merus with two 

 tubercles and lower siu-face with mesial row of seven. Rhomboid 

 annulus ventrahs with a high V-shaped ridge caudally and a medial 

 longitudinal trough, deepest at apex of bend in sinus; sinus originates 

 at caudal end of trough, makes a V-shaped arc dextrally and then 

 bends caudally cutting midcaudal margin of annulus (pi. \u; fig. 1^). 



Measurements (in millimeters) of C. I. chasmodactylus are as follows: 



