434 A HISTOEY OF EECENT CRUSTACEA 



pigmented eyes. The only species is Pseudarmadillo cari- 

 nidatus from Cuba or Mexico. 



Pm/sc§27^i,s, Gerstaecker, 1873, has three species, Pen/- 

 scyphis trivialis, Gerstaecker, from an East African Lake, 

 and two others from Egypt, for which at first Budde-Lmid 

 established a new genus GercocytonuSy which he cancels in 

 the same volume. The meaning of Cercocytonus\'& obscure. 

 Probably Ger coxy tonus was intended, meaning with acumi- 

 nate tail. Peryscyphis was no doubt a misprint for Peri- 

 scypJiis, the name alluding to the convex form of the 

 animal. 



Splicer onisciis^ Gerstaecker, 1854, has small eyes, the 

 second antennge short, with a three-jointed flagellum. 

 The single species is Splicer oniscus jlavomciculcdus, from 

 New Granada. Budde-Lund thinks that Pyrgoniscus cino- 

 tidus, Kinahan, 1859, from Eastern regions, may belong to 

 this genus. 



Cylloma, Budde-Lund, 1879, has very large prominent 

 eyes, the third joint of the first antennge very long, all the 

 pleopods with tracheal opercula. The single species Gylloma 

 ocidcdum is from New Zealand. 



PJlumcc, Budde-Lund, 1879, has simple, minute eyes, the 

 flagellum of the second antennge two-jointed, the opercular 

 branch of the first and second pleopods tracheal, the ter- 

 minal segment of the pleon subtriangular, the uropods 

 reaching beyond this, but not beyond the postero-lateral 

 angles of the preceding segment ; the outer branch of the 

 uropods is flattened, laminar. The type is Elitma purpu- 

 rciscens, Budde-Lund, 1879, from Madeira, the Azores, 

 Algeria, and Portugal. It is possible that this is synony- 

 mous with the earlier Arriiadilliclkim ccelcditm, Miers, 1877. 



ArmacUllidium, Brandt, 1833, has the flagellum of the 

 second antennge two-jointed, the opercular branch of the 

 first and second pleopods tracheal, the terminal segment of 

 the pleon with the apex variable, not produced beyond the 

 angles of the preceding segment, the uropods not reach- 

 ing beyond the terminal segment. Budde-Lund describes 

 thirty species, and names eight others attributed to this 

 genus. Dollfus in 1 88 7 adds five new French species, Simoni, 



