K0NGL. SV. VET. AKADEMIENS HANDL1NGAR. BAND. 21. N:0 5. 45 



bl) 1. The metacarpus of the second pair of pereiopoda is not produced. 



bbb 1. The processes of the last ural segment are very short 12. V. gracilis. 



bbb 2. The processes of the last ural segment are as long as 



the telson 13. V. gracileuta. 



bb 2. The metacarpus of the second pair of pereiopoda is produced an- 

 teriorly _ _ 14. V, ariuata. 



b 2. The peduncles of the last pair of uropoda are shorter than the rami, 



pyriform _ ._ 15. V. pyripes. 



The typical species V. Peroni was described in 1830 by H. Milne Edwards (see 

 below). However I was not able to find it in the collection of Hyperids from the »Musee 

 du Jardiri des Plantes», most liberally entrusted to me for examination by Professor Al- 

 phonse Milne Edwards, nor have I succeeded to identify it among those many hundreds 

 of Vibiliae that I have examined in other collections. 



In the year 1836 Templeton 1 ) described under the name of Thaumalia debilis a 

 crustacean which probably is a young Vibilia, but the description is too incomplete to 

 allow of its identification. In 1845 Lucas (see p. 48) gave a good figure and a short 

 description of Vibilia Jeangerardi from the coast of Algeria. A. Costa in 1883 proposed 

 the name Vibilia xpeeiom for a Vibilia whieh according to the apprehension of Marion 

 is the same animal as the last mentioned. The suggestion of this author seems to be 

 well founded, judging from a comparison of the drawings and descriptions. The 

 next increase in the number of species is due to Spence Bate, who described in 1862 

 (see below) two new species, viz. Vibilia Edwardsi and Vibilia affinis. The same author, 

 in connection with Westwood (see below), mentions shortly in 1868 a new species, Vibi- 

 lia borealis, distinguished by the broad femora of the fifth to seventh pairs of pereiopoda. 



1. VIBILIA PERONI, H. MILNE EDWARDS, 1830. 



Vibilia Peroni, II. Milne Edwards. 

 Facsimile from Mii.ne Edwauds Hist. nat. Crust. Ill, pi. 30, (ig. 1. 



Diagn. Caput rostratum segmentis duobus primis pereii brevius. Flagellum antennarum primi paris 

 ante rotundatum, capite paullo longius. Femora parium sex primorum pedum pereii cylin- 



J ) In the Transactions of the Entomological Society; vol. 1, p. 186. PI. 20, fig. 2. 1836. 



