184 Records of the Indian Museum. [Vol. VI, 



Gen. Paraperiscyphis, nov. 



Periscyphis was instituted by Gerstaecker in 1873, accord- 

 ing to Budde-Lund. who refers to the account then given of " Die 

 GHederthier-Fauna des Sansibar-Gebietes, nach dem Material der 

 V. d. Deckenschen Expedition, p. 526." Budde-Lund gives a fresh 

 definition of the genus in 1908 {Results of the Swedish Zool. Exp. 

 to Egypt, No. 26A, p. 10), and names the species included under it 

 (" Isopoda von Madagaskar und Ostafrika," Voeltzkow's Reise, 

 vol. 2, p. 278), To the genus thus defined Paraperiscyphis is ap- 

 proximate in regard to the mouth-organs, but is separated from it 

 by the following characters : — 



In the second antennae the first joint of the flagellum is not 

 longer than the second ; the telsonic segment is very obtusely 

 triangular, not narrowly produced at the apex; the inner branch 

 of the uropods is attached not to a projection of the peduncle's 

 base but to a notch far down the inner margin, while still 'further 

 down is attached the outer branch, not especially small, both 

 branches extending beyond the peduncle, and the peduncle itself 

 extending beyond the telsonic segment. 



Paraperiscyphis travancorensis , sp. nov. 

 (Plate xi.) 



The present species should be taken as the type of the new 

 genus. But Periscyphus weberi, DoUfus (in Max Weber's Zool. 

 Ergebn. einer Reise in Niederl. Ost-Indien, vol. iv, p. 371, pi. 14, fig. 

 16, and in text-figs. 16 a — d, 1898), is probably congeneric' For 

 that species, however, no account is given of the mouth-organs, so 

 that its generic position is rather uncertain. No reason is given 

 for the spelling Periscyphus instead of Periscyphis, but there can 

 be no doubt that Gerstaecker's genus was intended. 



From the species taken at Sumatra, described and figured by 

 Dollfus, the present form differs in various points. The rather 

 broad conglobating body is not smooth, but covered with little 

 minutely setulose warts. A much deeper transverse furrow than 

 that shown by Dollfus separates the convex part of the head 

 which carries the round prominent eyes from the forward part, 

 which in both species shows a little median triangle between two 

 broad lobes. While Dollfus speaks of the first segment of the 

 peraeon as having the hind margin a little sinuous, in the present 

 species the sides of that margin are angularly produced backward 

 in quite an exceptional manner, with the second and third seg- 

 ments following suit hardly less conspicuously. In the second 

 antennae Dollfus says that the flagellum of his species has the first 

 joint one-third shorter than the second; in ours the second is but 

 slightly longer than the first, apart from the apical seta which has 



1 In Lanchester's "Malay Crustacea of the Skeat Exp." {Proc. Zool. Soc, 

 p. 380, 1902) Budde-I/und, describing Toradjia conglohator, u. sp., says of that 

 genus, " The Perysciphus iveberi Df. may be placed here." 



