LEÜCOSIA URANIA. 123 



margin of' the propodite spinulose , dactylopodites slender 

 and compressed with four ridges of acute spines. 

 Breadth of carapace of our largest specimen (a female) 59 mm. 

 Length » » » » » » 41 mm. 



Breadth of anterior frontal margin of this specimen 18 mm. 

 Our specimens were collected by Messrs. Biittikofer and 

 Sala in the rivers of Liberia, West Africa. 



Leucosia neocaledonica Alph. M. Edw., 



Leucosia longifrons de Haan, 



Leucosia pulcherrima Miers. 



As has lately been remarked by Mr. K. Martin (Die 

 Tertiarschichten auf Java, Leiden, 1880, pag. 128) and 

 as I can confirm, Leucosia neocaledonica Alph. M. Edw. (Nouv. 

 Arch. Mus. Hist. Nat. t. X, pag. 40, pi. 11, fig. 1) without 

 any doubt is identical with Leuc. longifrons de Haan. The 

 form and granulation of the thoracic sinus is quite the 

 same in both species , as are also the form and granulation 

 of the anterior legs. The typical specimens of longifrons 

 are also similarly coloured as has been described by the 

 French naturalist. I regard L^euc. pulcherrima Miers (Trans. 

 Linn. Soc. II Serie, Vol. I. pag. 236, pi. XXXVIII, fig. 

 4 — 6) too as a variety of these species, for it is only 

 distinguished by different colouration of the carapace. I 

 have found a dry specimen of Leucosia in oar collection, 

 from New-Caledonia, the carapace of which is similarly 

 marked as in Leuc. pulcherrima , though the trilobate patterns 

 on the anterior half of the carapace are not confluent in 

 the middle line : in its principal characteristics however this 

 specimen entirely agrees with a typical specimen of Leuc. 

 neocaledonica , presented to our Museum by Mr. Alph. Milne 

 Edwards. But I cannot find any marked difference between 

 Leuc. longifrons de Haan and Leuc. urania Herbst , so that 

 I believe the three above-mentioned species to be all iden- 

 tical with the species of Herbst, figured Tab. LIII, fig. 3 



Notes trom the Leyden M.useuna, "Vol. III. 



