40 SMITHSONIAN MISCELLANEOUS COLLECTIONS 



the outer surface, parallel with and just beneath the upper margin; 

 fingers sulcate, inner margins denticulated, tips sharp. Ambulatory 

 feet glabrous, nearly smooth ; superior edge of meros granulated or 

 minutely denticulated. 



Color in preserved specimens whitish, tinged with dusky orange. 

 Fingers of a black color, not shading off toward the hand. Dimen- 

 sions : Length of carapax, 0.57; breadth, 0.92 inch. 



It has some resemblance to L. obtusa in its smoothness and gen- 

 eral proportions, but its lateral lobes are acute and the fingers not at 

 all excavated. It approaches Xantho, being less broad than other 

 species of Lioniera, to which genus it is referred from the character 

 of the markings on the carapax. 



Found at Loo Choo. 



Genus LACHNOPODUS Stimpson 



In this genus, as in allied forms, the carapax is smooth and pos- 

 teriorly convex ; the antero-lateral margin obtuse, with the teeth, or 

 rather, lobes, but little prominent. At the external angle of the orbit 

 the margin is more strongly puckered than in other genera of the 

 family. The arrangement of the antennae is as usual in Carpilius, 

 Xantho, etc. The inner ramus of the internal gnathopoda is not 

 furcate. In the hectognathopoda the ischium is marked with a longi- 

 tudinal sulcus ; the surface of the meros presents a depression near 

 the internal angle, and the anterior margin of this joint is concave. 

 The meros of all the feet is spinous above ; the external surface of 

 the hand is sulcated, and the last three joints of the ambulatory feet 

 are thickly setose. 



The character of the feet separates this genus from Liomera and 

 Liagora, in which they are naked. 



51. LACHNOPODUS RODGERSII Stimpson 



Plate V, Fig. 4 



Lachnopodus Rodgersii Stimpson, Proc. Acad. Nat. Sci. Phila., x, p. 32 

 [30], 1858. 



A single specimen only, a male, of this species was collected, in 

 which the proportions of the carapax were, length to breadth as 

 1 : 1.49. Upper surface convex, smooth. On the antero-lateral 

 margin the two exterior or lateral lobes only are well marked, form- 

 ing small teeth, sufficiently prominent, although obtuse and distant ; 

 the separation between the first and second lobe is scarcely percept- 

 ible. Front a little prominent, and emarginate at the middle. 



