THE .MVi:iAINtl>A IN THR Al'STKAl.lAN Ml'SKf.M KKttl.K.M A N N. 119 



fonr sensory cones. Cap of r^natliooliilaiMum with its median 

 plate rounded backwards (not forked). Second joint of man- 

 dibiila with its dorsal expansion almost loose. The remaindei- 

 as in Pocock's diagnosis. 



In this genus, the copulatory appendages show a quite 

 unusual structure. Most striking are the presence of the 

 proximal endoskeletic process of the coxse of anterior gonopods, 

 and the growth of the tibia. Such features agree with no 

 other genus, except perhaps Faraspiroholus. 



The description of the latter genus^^ is evidently erroneous 

 and imperfect ; erroneous, while the coxae of anterior gonopods 

 have undoubtedly been mistaken for the posterior gonopods, 

 owing to the resemblance of their endoskeletic process with a 

 tracheal stalk ; imperfect, while the postei-ior gonopods have 

 been overlooked. Yet it is not likely that both genera should 

 be synonymical, as Paranjyiroboliis is said to possess only 2 -|- 

 2 labral dimples (instead of 4 -)- 4) and as the tibia ap])ears to 

 be larger still than in Sjjii'oholeUn!^. 



Turning to Pocock's genus, it is to be mentioned that a 

 seminal duct and a bladder exist in the posterior gonopods, 

 but these are different from the similar organs of Trigonitiliis, 

 for instance, in being simply open grooves. It is by no means 

 surprising that they should have escaped Carl's attention as 

 they are scarcely more chitinized than the gonopods them- 

 selves, and coiild only be detected by using oblique light. 



Spikobolellus rainbowi, sjj. nor. 

 (Plate xvi., figs. 33-38). 



(a) S mat. : length 40 m/m ; diameter 3.50 m/m ; 44 seg- 

 ments ; three segments apodous ; 75 pair of legs. 



(b) $ mat. : length 51 m/m ; diameter 4.50 m/m ; 44 seg- 

 ments ; one segment apodous ; 81 pair of legs. 



(c) ? mat. ; length 43 m/m ; diameter 4.30 m/m ; 47 seg- 

 ments ; two segments apodous ; 85 pair of legs. 



(d) 9 mat. : length ?; diameter 4.50 m/m ; 45 segments ; 

 two segments apodous ; 81 pair of legs. 



(e) 2 mat. : length 42 m/m ; diameter 4 m/m ; 44 seg- 

 ments ; two segments apodous ; 79 pair of legs. 



»•- Brolcmann — Rev. Mus. Paulista, v., lyoi, p. 183. 



