iQii.] T. R. R. Stebbing : Indian I sopods. 183 



arrangement, except to deprecate the use of sub-families ^ I may 

 observe that he places the genus Saidjahus in his second sub- 

 family Spherilloninae, and that probably his seventh sub-family 

 will cover all the rest of the genera here considered. Thus Para- 

 periscyphis will naturally stand beside Periscyphis in the first 

 section, which Budde-Lund calls Armadilloidea, Hemikpistus and 

 Porcellionides belong to his second section called Oniscoidea, and 

 the new genus Exalloniscus will find its place beside Dana's Allo- 

 niscus in the third section Alloniscoidea. In 1908 Budde-L,und 

 himself gives a very reasonable premonition that the last word has 

 not yet been said on the classification of the terrestrial Isopoda. 

 There are in fact many parts of the world and many parts of 

 India so little explored for animals of this group, that the future 

 may have much to learn about its constitution. 



Gen. Saidjahus, Budde-Lund. 



1904. S^y/a/ms, Budde-Lund, .4 Revision of "■Crustacea Isopoda 

 tenestria^" pp. 36, 42, 49. 



The genus was instituted to receive three species, orientalis, 

 elegans and guUatus, all established by Dollfus in 1898 and by 

 him referred to his genus Mesarmadillo, described with three other 

 new species in 1892 [Ann. Soc. Entom. de France, vol. 61, 

 P 385) Budde-Lund assigns Saidjahus to his family Oniscidae, 

 sub-family Spherilloninae. In his synoptic view he distinguishes 

 it from other genera of the family by the combination, of charac- 

 ters, pleural parts of the head coalesced, flagellum of second anten- 

 nae two-jointed, telsonic segment narrowed behind, sub-triangular, 

 uropods of moderate size, reaching a little beyond the telsonic 

 segment, the lateral margin of the first per aeon segment with a 

 rather thick duplicature. In the formal definition on p. 49 he adds 

 that the head has the vertical marginal line produced to the eyes, 

 that the side-plates of the first peraeon segment are fissured behind, 

 that the sides of the telsonic segment are incurved, and that 

 the outer branch of the uropods is small, thin, inserted in the 

 hind side of the peduncle. He describes, with some figures, a 

 new species, 5. creper, from Borneo. 



Saidjahus, sp. 



Specimens procured by Dr. Annandale at Mandapam, Pamben 

 Passage, S. India, in sand under stones, agree with this genus. 

 In the length of 6 mm. these agree with S. guttatus (Dollfus), 

 But in the shortness of the outer branch of the uropods they are 

 nearer to S. elegans, from which they are separated by having the 

 first joint of the flagellum of the second antennae little shorter 

 than the second, just as is the case in S. orientalis (Dollfus). Not 

 knowing how much variability the species may be liable to in these 

 respects I abstain from giving a name to the present form. 



