NEW MARINE ISOPODS^ — MENZIES 131 



Character of tody. — Body elongate, narrow, and flattened. Lateral 

 borders of cephalon and body with few setae. Wliite in color, no 

 black chromatopliores evident. Lateral peraeon areas not expanded 

 into conspicuous lappets. 



Cephalon. — ^About as long as wide. Frontal margin with a very 

 slight median lobe ; anterolateral angulate expansions lacking. Eyes 

 very large, situated close to the lateral margins. A single large seta 

 on lateral border opposite each eye. 



Peraeon. — First somite with anterior border slightly concave. Lat- 

 eral portions of first to third somites directed slightly anteriorly, 

 fourth laterally, fifth to seventh slightly posteriorly. First somite 

 longer than second, second equals length of third, fourth shortest, fifth 

 slightly longer than fourth, sixth longer than fifth, seventh longer 

 than sixth, being about twice the length of the fourth somite. Lat- 

 eral borders first to third somites bilobed. Lateral border of fourth 

 somite with a pronounced anterior lobe and a very weak posterior 

 lobe. Lateral border of fifth to seventh somites expanded, slightly 

 convex, lacking a pronounced posterolateral angle. Lateral lobate 

 extensions of second and third peraeon somites separated from one 

 another by a distance exceeding three times the length of largest 

 lobe. Epimera bilobed and setiferous, visible in dorsal view on all 

 peraeon somites. 



Pleon. — Pleotelson slightly longer than wide. Lateral borders with 

 few setae; median lobe of posterior margin small. Posterolateral 

 areas evenly rounded, no evident angles formed. Dorsal surface with- 

 out conspicuous setae. 



First antenna. — Similar to that of Janiralata davisi (compare figs. 

 20, j, and 21, /) but having narrower peduncular joints. Flagellum 

 composed of 13 joints. First and second peduncular joints with 

 ciliated setae. 



/Second antenna. — Peduncule similar to that figured for /. davisi 

 (see fig. 19, &), flagellum missing. 



Maxilliped. — ^With three coupling hooks. 



First maxilla. — Outer lobe with 12 denticulate setae. Inner lobe 

 with three large setae and some narrow marginal setae. 



Second maxilla. — Each of the two outer lobe lappets with four 

 apical denticulate setae and a medial row of conspicuous pectinate 

 scales. Inner lobe with seven large setae and a few smaller setae. 



Mandihle. — Left mandible incisor process with five teeth, lacina 

 with four teeth, setal row with six setae, second joint of palp with four 

 small denticulate setae in an oblique row between two larger marginal 

 setae. Right mandible lacks lacina • has nine setae in setal row. 



First peraeopod. — Similar to that figured for J. davisi (compare 

 figs. 19, c?, and 22, h) except that the carpal inferior margin has 26 

 2-pointed setae. 



