Metacirolana 153 



RECORDS Caribbean to Brazil; common in the intertidal of sandy beaches; 

 Gulf of Mexico. 



Gulf of California to Chile. 



REMARKS Glynn et al. (1975) produced a thorough study of the taxonomy, 

 zonation, and distribution of this Pan-American species. 



Excirolana mayana (Ives, 1891) 

 Figures 68D-F, 69D,E 



DIAGNOSIS 6 8.2 mm, 9 10.0 mm. Frontal lamina between antennal bases 

 about half anterior width. Clypeus anteriorly rounded. Uropodal endopod 

 about Vs length of exopod. Pleotelson with two faint lateral hollows in ante- 

 rior half, not connected by impressed line. 



RECORDS Florida to Venezuela, intertidal. 



Metacirolana Nierstrasz, 1931 



DIAGNOSIS Frontal lamina anteriorly dilated, free, projecting; clypeus tri- 

 angular, projecting ventrally. Maxillipedal endite with one coupling hook. 

 Pleon with five free segments, pleonite 5 not overlapped laterally by pleonite 

 4. Eyes often larger, and antennular flagellum of more articles in 6 than in 



9. 



Key to species of Metacirolana 



1 . Telson posteriorly truncate halia 



Telson posteriorly rounded or angulate 2 



2. Posterior margin of telson an obtuse angle agaricicola 



Telson posteriorly rounded 3 



3. Posterior margin of telson narrowly rounded; uropodal rami, margins 



strongly dentate menziesi 



Posterior margin of telson broadly rounded; uropodal rami, margins 

 obscurely dentate sphaeromiformis 



