256 CEYLON PEAEL OYSTER REPORT. 



Gallea,* n. gen. 



Body tumid, integuments strong ; 3rd and 4th side-plates very large. Head with 

 a deflexed rostrum. Antennae suhequal ; the upper without an appendage and 

 having the 2nd joint produced in a hood-like process over the 3rd. Mandibles with 

 the molar tubercle obsolete ; the palp long and slender, the 3 joints suhequal. 



Gnathopods stout, dissimilar, the 1st pair complexly subchelate as in Lev cot/we ; 

 the 2nd pair rather less powerful, subchelate, as in Amphilochoides. Pera'opods 

 slender. 



Second pair of uropods longer than the 3rd. 



A carina runs along each side of the pleon and urns, uniting to form a pointed 

 roof-like projection above the telson. Telson entire. 



This is an aberrant genus resembling Leucothoe in its first and Ampltiloclioides in 

 its second gnathopods. The length of the 2nd uropods is also unusual in this family, 

 in which they are generally shorter than the 3rd ; and the absence of a molar 

 tubercle in the mandibles is inconsistent with G. 0. Sars' definition of the family. 

 It is a link between Amphilochidse and Leucothoidae. 



Gallea tecticauda,t n. sp. Plate III., figs. 16, and Plate VIII., fig. 16. 



An abundant species in several localities round Ceylon. 



Head with a small pointed and deflexed rostrum ; no ocular lobe. Eye large, 

 round, red, with many facets. 



First and 2nd side-plates very small and hidden by the very large 3rd plate, 

 which, with the still larger 4th plate, forms a complete cuirass (Plate VIII. , fig. 16). 



The 4th and 5th segments are subequal, and each of them as long as the 6th and 

 7th together; the latter have their lower part produced behind in an acute point; 

 the 2nd pleon segment has the hind angle acute, and the 3rd is considerably produced 

 behind, the convex hind and lower margins together forming a semi-oval. 



Urns as long as the last 2 pleon segments, not counting the hood-like process ; the 

 1st segment dorsally depressed, the 2nd produced in a roof-like process convex above 

 and extending over half the telson (Plate III., fig. 16. ur.). 



Upper antennae : 1st joint shorter and wider than the 2nd, its upper and lower 

 margins produced distallv : 2nd with an elevated ridge produced above the short 3rd 

 joint for half its length ; flagellum 8 or 9-jointed, with 1 or 2 jointed (?) setae at the 

 end of each joint. 



Lower antennae : 1st joint contracted beyond the middle, the lower margin 

 produced in a short tooth, about two-thirds the length of the 2nd ; 3rd rather longer 

 than the 2nd; flagellum 3-jointed, about as long as the 1st joint. 



* From the port of Galle. 



f From the roof-like projection over the telson. 



