Notes on the Fa mill/ Cathypnidie. By J. Murray. 551 



Cathypna lofuana sp. n. Plate XXII, fig. 1. 



Specific Charctcters. — Large, oblong ; dorsal plate narrower, 

 truucate behind. Anterior margins shallowly excavate, with small 

 lateral spines. Posterior lobe of lorica trefoliate. Lateral margin 

 of dorsal plate abruptly bent near the anterior border, not reaching 

 to it. Toes about half the length of lorica, tapering, with sharp 

 shoulder and short claw. Lateral and posterior sulci deep. 



Description. — Length of contracted lorica 150//,, of dorsal 

 plate 120 fjL, of toe 65 /a ; breadth of dorsal plate 105 /x, of ventral 

 plate 115 yLt, of anterior border 80 /a. 



The ventral plate is widest in the middle, the dorsal nearer 

 the front. The anterior border shows at each side a sigmoid curve 

 reaching to near the median line, and in the middle a short convex 

 piece. 



0. lofuana has most resemblance to G. luna and C. curvicornis. 

 G. luna has the dorsal plate wider, and is more deeply excavate 

 in front. G. curvicornis has longer toes, with obscure shoulder and 

 claw. The 3-lobed posterior end of the lorica and the peculiar 

 abrupt inbending of the margin of the dorsal plate in front sufi&ce 

 to distinguish this species from all others. 



Halitat. — The Lofu Eiver, Lake Tanganyika. Collected on 

 the third Tanganyika Expedition, under Dr. Cunington, 1904-1905. 

 I found the specimen, unnamed, in the collection of Mr. Eousselet, 

 who kindly placed it at my disposal. 



Gathypna papuana sp. n. Plate XXII, figs. 2a-2d. 



Specific Gharacters. — Short and round, truncate in front. Dorsal 

 plate nearly circular, truncate both ends. Ventral slightly 

 narrower. Dorsal anterior margin slightly excavate and undulate ; 

 ventral elevated above dorsal except in the middle, where there is 

 a deep incision. Sulcus moderate, posterior lobe short, rounded. 

 Toes short, with shoulder and claw, the shoulder bearing a small 

 spine. 



Description. — Length of contracted lorica 105 p., of dorsal plate 

 95 fjL, of toe 50 fx ; breadth of dorsal. plate 100 p, of ventral plate 

 92 /x, of anterior margin 80 /x. 



The ventral plate is oblong, and very little diminished in front, 

 making a very wide anterior border. The dorsal lateral margin 

 is evenly rounded in front, and can be traced almost to the anterior 

 border. 



G. papuana is very similar to G. luna, but has a quite different 

 anterior border, wider, less excavate, and of peculiar outline. It 

 is smaller, and relatively shorter and broader. 



Habited. — New Guinea. Placed at my disposal by Mr. Eousselet. 



