90 RECORDS i)V THK AUSTRALIAN MUSEL'.M. 



I'lil ij(ley<iiiiis (StroiiijijId^iiDni) in imtnl ti m, Karscli, 



1881 9: Adelaide. 



Puhjdes))! lifi (Struinjijlofiniini) ^mjilln ri urn , Kai'scli, 



1881 .' ' J : Sydney. 



Sty(>ii(jijh<>^o)ii(t sfiiiniil, Attems, 1898 9- Q'^^enslaiid. 



■ EiiyttroiiiiijUi'iniiia traiixn'rxe-fiixciidiuii, Silvesti-i, 



1897 ."... 9: Gayiulali. 



Eii!<tru)iij;il(i'in,iiii liifidcntaht, Silvestri, 1898 ...(J: Cairns. 



But four out of the eight species can afford no useful indica- 

 tions, as they are known only from female specimens. Nothing 

 is to be made out of the embryonary description of a fifth 

 species, )S. scK/itfdn'nni, Karsch. Three more species remain, 

 the coj)nlatory organs of whicli are known thi'oagh sketches 

 given by their authors; and this makes it possible to compare 

 them with An.^tniJiiin(iii/i!. 



For instance, there is hardly any (loul)t that »S. iiuntrrn' is 

 closely related to the ccmtinental forms. Attems' drawing*' 

 sliow.s coxa of the gono])ods to be crooked, and the femora to be 

 very distinct ; also Humbert & Saussure's description mentions 

 "chez le male, enti-e les pattes de la premiere pairo du cinquicme 

 segment, une apophyse courte, arrondie et com pii nice trans- 

 versalement." On the other hand, the development of the 

 keels (which is indeed of little importance), and the shape of 

 the gonopods, with long outsti'etched tibia and short rudimen- 

 tary branches, indicates that ,S. iiuran-n' has to be held as an 

 aberrant form showing traces of evolution" : it will, therefore, 

 be pix)bably found necessary to isolate this species from the 

 bulk of the continental Ausfriilidsmini, when the limits of 

 variation of the characters of the latter become better known. 



As regards S. t ndi-srcrse-tiriiiKtidiiiiud E Kxtniin/t/lo.tdiiut hifdlrK- 

 tiiu/, it raa}^ be safely assumed that they belong to the newgenus, 

 judging from the shape of the gonopods which bear a striking 

 reseml)lance to the same organs of .1. niiulimrl n\n\ of A. tr<i<l'J"tfi- 

 Yet nothing is known as to the ])resence of secondai-y sexual 

 characters, the authoi-s remaining silent on this ])oint. That 



^ Attems — System dcr I'olydcsmiJcn, 1, IS9S, I'l. iii., (ij^. 58. 



'■' A similar case, thoii.uli less charactcri/.cJ, will he loiiiui luicat'lcr 

 in Anstraliusoma kosciiiscovngnin. 



