546 



BULLETIN 129^ UNITED STATES NATlONAI, MUSEUM 



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third, fourth, and fifth ab- 

 dominal segments in the male 

 fused; all separate in the 

 female. 



Measurements. — Male, holo- 

 type, length of carapace 6.4, 

 width of same 10.3, length of 

 cheliped about 20 mm. 



Range. — Jamaica; Porto 

 Rico. 



Material examined. — See 

 table, page 546. 



Genus MESORHOEA Stimpson 



Mesorhoea Stimpson, Bull. 

 Mus. Comp. Zool., vol. 2, 

 1871, p. 135; type, M. 

 sexspinosa Stimpson [by 

 error, sexpinosa]. 



Resembles Solenolambrus in 

 form and armature of cara- 

 pace, character of feet and of 

 pterygostomian and hepatic 

 channels, except that the lat- 

 ter are deeper. Differs, how- 

 ever, in the efferent channels 

 meeting at the middle of the 

 endostome, which has there a 

 triangular projection, and a 

 deep notch in its vertical, 

 laminiform wall. Merus of 

 external maxillipeds acutely 

 produced forward at internal 

 angle and behind it the palpus 

 is entirely concealed. Epi- 

 stome very short. Eyes 

 small and capable of retrac- 

 tion into their deep sockets 

 so as to be almost completely 

 hidden. Basal article of ex- 

 ternal antennae somewhat 

 shorter than next article. 

 (After Stimpson.) 



Contains only the two fol- 

 lowing species. 



