74 STALK-EYED CRUSTACEA 



fissures. The movable part of the external antennae is 

 inserted between the border of the rostrum and the 

 terminal tooth of its basal joint, which is visible on a 

 dorsal view, but much smaller than the horns of the 

 rostrum. The basal joint is almost as long as the 

 second joint. Colour is yellow. 



Range. — Barbados, Bermudas, Florida, Brazil. 



7. Macrocoelorna. 



Macroavloiiia . . . Miers. 



Periccra (part) . . . H. Milne Edwards. 



The carapace is rather convex, usually broadest at 

 the branchial regions ; the interorbital space broad ; 

 the dorsal surface unarmed or tuberculated, or with a 

 few long spines ; the margins without a series of 

 elongated spines, but often with a strongly developed 

 lateral epibranchial spine, preceded sometimes by some 

 smaller spines ; the pr^eocular spine is small. The 

 spines of the rostrum are well developed. The tubular 

 orbits project laterally. The external antennre have 

 the basal joint armed with a spine on the distal margin, 

 which is usually visible on a dorsal view, and sometimes 

 with another placed immediately beneath the first mobile 

 joint ; the mobile part of the antenna; is sometimes con- 

 cealed in a dorsal view by the rostral spines, sometimes 

 visible at their sides. The fourth joint of the external 

 maxillipedes is distally truncated, with the antero-internal 

 angle emarginated. The palm of hand of the first pair 

 of legs are either somewhat elongated and compressed 

 or shorter and more dilated ; fingers with or without an 

 intermarginal hiatus when closed. The walking legs are 

 rather short and moderately robust ; last joint slightly 

 curved. 



