180 



U.S. NATIONAL RIUSEUM BULLETIN 29 2 



rather flat and broad, merus of third pereiopod about two-fifths 

 as wide as long. A rather small species, carapace length in midline 

 13.5 mm. 



Habitat. — Unknown. 



Distribution. — Known only from the unique type-specimen from 

 the "West Indies." 



70. Sesarma (Holometopus) miersii Rathbun 



Figures 59, 62g-i 



Sesarma (Holometopus) miersii Rathbun, 1897a, p. 91 [type-locality: Great 

 Abaco I., Bahamas]; 1918, p. 303, pi. 84. 



Diagnosis. — Carapace subquadrate, about nine-tenths as long 

 in midline as wide, moderately convex longitudinally and trans- 

 versely, striate laterally, obscurely granulate anteriorly; lateral 

 margins converging very slightly anteriorly, wdthout tooth posterior 

 to outer orbital angle, fronto-orbital distance nearly equaling max- 

 imum width of carapace; front abruptly deflexed at postfrontal lobes, 





Figure 59. — Sesarma {Holometopus) miersii, male paratype (carapace length 16.8 mm) 

 from Great Abaco I. {Albatross). 



slightly more than half as wide as carapace, margin with shallow 

 median sinus in dorsal view. Eyes well developed, cornea slightly 

 wider than eyestalk. True ventral margin of orbit largely replaced by 

 faintly sinuous granulate ridge accentuated posteriorly by rather 

 deep groove, mesial end of ridge not curving to anterolateral angle of 

 mouth area. Third maxillipeds A^th oblique hairy ridge on merus, 

 gaping widely, exposing mandibles. Chehpeds subequal, carpus un- 



