THE MYRIAPOUA IN THE AUSTKAMAN' MUSEUM IiH()LEMANN. 123 



(1>. hiiJosericcK.'^, I>. laiiri'nhthix, PI. xviii., tiu'. <)1) ; of even the 

 branch seems to bo ribbon-shaped on its wliole len<j;t.h (D. 

 fulcatus, D. caviiiatiix). It lias not l)een I'omnl appropi'iate to 

 make use of these structures until theii' constancy shall have 

 been verified on some larger material ; they are mentioned here 

 in order to draw the attention of specialists to this interesting 

 point. 



As far as can be understood from the descriptions issued by 

 preceding authors, the species belonging to Vinenmtocricus are 

 prevalent in the islands east of the Sunda Archipelago. Most 

 of the Jilnwifrici of the Celebes Islands recently described by 

 Dr. Carl (1912) undoubtedly belong to the new genus ; many 

 more are known to inhabit tiie Moluccan Archipelago, the Kei 

 and Aru Islands, the Australian continent and to reach as far 

 east as Fiji ; a single species, so far as known, is recorded from 

 America, viz., Bhhiocricm cdiiJidnx, Newport ; and even this 

 has to be held as an aberrant form, on account of its pre-anal 

 segment being provided with a conspicuous spiniform process. 



It has been found necessary to divide the new genus into 

 three sub-genera, according to the presence or absence of the 

 inner branch of the posterior gonopods, and to its ])osition. 



The sub-genus Diiiciinilucririix, sensit strii-tii, will include such 

 species in which the distal joint of the posterior gonoi)ods is 

 divided into two flagelliform (or at least gradually tapering) 

 branches, the distance between the proximal swelling of the 

 joint and the root of the inner branch being about equal to the 

 length of the latter. 



The sub-genus (Jladiscocriciis will be represented by the sole 

 type species D. (C.) falcatus, in which the inner biunch of the 

 distal joint of posterior gono{)ods starts immediately above the 

 proximal swelling. 



The third sub-genus, A('la<hicrica.^, which might perhaps as 

 well be given generic value, will be made to contain 

 species similar to E. pi/rrholumK, Attems (chosen as type), of 

 which the posterior gonopods are composed of a single flagelli- 

 form branch, the inner branch missing. 'No further reference 

 will be made to this third sub-genus, of which no representative 

 was found in the collection of the Australian Museum. It 

 would be highly interesting to know where, in such case, ends 



