21 



Gen. III. Leucosia. 



Sp. 1 . Leucosia craniolaris, 



L. fronte dentibus tribus : medio longiore. 

 Cancer craniolaris. Ihrhst 1. 90. tab. %.f. ly, 

 Leucosia craniolaris. Fahr. Suppl. Ent. Si/st. 3.50. 



Latr. Hist. Kat. des Crust, et des 

 Insect. 6. 117. 



Lat?\ Gen. Crust, et Insect. 1 . 36. 



Licht. Bert. Magaz. 1815. /). 141. 

 Habitat in Indiae mari. 

 Mas. Linn. Soc, JVostr. S ■ 



In Herbst's figure the frontal teeth are represented 

 equal, whereas in all the specimens that J have examined 

 the middle one is longest. 



Sp. 2. Leucosia Urania. 

 L. fronte prpminente integro. 

 Cancer Urania. Herhst 3. 2. 17. t. 53. /. 3. 

 Leucosia Urania. IJcht. Bcrl. Mag. 1815. /;. 140. 

 IJabitat in Oceano Indico. 

 Mus. Britan., Soc. Linn. ? . Donavit Hardwicke, 



The last joint of the four hinder pair pf legs, in the fe- 

 male, which is the only sex that I have seen, is very much 

 dilated, and compressed both above and below. In L. cra- 

 niolaris this joint is merely compressed, and is nearly fili- 

 form. The claws of both species are compressed. 



