1002 



ON A NEW B.VRTnWOBM FROM INDIA. 



[Dec. 18. 



The diverticulum is longer than the sperniatheca ; it is plainly com- 

 posed of a duct and of a distal monilif orm sperm-receptacle. The 

 two parts are about equi-sized. The accompanying drawing (tig. 2, 

 p. 1001) shows how different are the sperinatheooe of A. alexandri 

 from those of A. triaitatis, which latter are more like those of 

 A. Jteterocha'tus \ The salient points of difference between the 

 three species may be thus tabulated : — 



Clitellum 



Setae of anterior I 

 segments on either I 

 side of ventral line J 



Genital papillae 



Spermathecae - 



Spermiduoal glands -. 



A. keterochatus. 



A. trinitatis. 



xiv. -xvi. or xiv. -xvi. xiv.-xvi. 



markedly larger. : not larger. 



present. 



ent. 



A. alexandri. 



not larger. 



absent. 



open laterally, with open dorsal ]y, with open laterally, 



short duct. short duct. j with long duct 



often absent or large, always large, always 



rudimentary. present ? present ? 



It is obvious that these three forms come very near to each other 

 A rough general description would very readily confuse their 

 points of uulikeness, which appear to me, who have studied all 

 these species, to be unmistakable. The following is a sufficient 

 definition of the new species : — 



Amyntas alexandri, n. sp. 



Length 145 mm. ; number of segments 1'3'3. Setae of most 

 anterior and most posterior segments rather larger. Clitellum 

 xiv.-xvi., without setae. Male pores separated by 13 seta*. No 

 genital papillae. Septum viii./ix. absent. Caeca rather large. Last 

 heart in xiii. Sperm-sacs in xi., xii. Spermiducal glands inxvii.- 

 xx., broader anteriorly, much lobate ; duct longish, horseshoe- 

 shaped, without terminal sac. Spermathecae in vi.-ix., with long 

 thick duct longer than pouch ; diverticulum longer than sperma- 

 thecae, with equi-sized duct and sperm-chamber. Spermathecae 

 open laterally. 



Hah. Calcutta 1 . 



1 I have distinguished A. trinitatis naA A. heterochcetus by the longer diverti- 

 cula of the former. I think that this somewhat variable characteristic will 

 hardly do. There is no doubt, however, about the more dorsal position of the 

 spermathecae in A. trinitatis. 



- The very accurate drawings (figs. 2, 3) which accompany this paper should 

 render the characteristics of these organs clear. 



: ' The genus being Malayan, the species may not be really indigenous 

 here. 



