Oli(joc}ue(a of Travaticore. 497 



the other species of the same genus by tlie position of the 

 male and spermathecal pores, number and position of the 

 gizzards, and shape of prostates. 



Fam. MegascolecidaB. 



Subfam. MEOAScoLECiy^. 



Plutelius timidas, sp. n. (PI. XIII. fig. 4.) 



Five mature specimens are in the collection. 



External characters. — Length .^0-48 mm., thickness about 

 1 mm.; segments nearly constant in number, viz. 116-liy. 



Colour violaceous grej', at the clitelkim brown violaceou-^. 



Head epilobous, prostomium small. The body is a little 

 compressed behind the clitellum, except the tail. 



Setffi paired all along. The dorsal bundles are beyond the 

 lateral lines. About at the x. segment aa = ^^ ub, «6 = | Oc, 

 bc=cd^ cfl? somewhat smaller than dd, dd a little larger tliau 

 ■^ of the whole circumference. The middle lateral distancpa 

 increase in amplitude behind the clitellum, whilst the 

 middle dorsal distance is gradually reduced. At the middle 

 region of the body «a = .| ab, ab = l be, cd = ^ be, dd=cd. 

 At the tail aa = ab = \ be, dd=:cd=^ be. 



First dorsal pore at the intersegmental furrow xi.-xii. 

 (?x.-xi.). 



Nephridial poie>^, at least before the clitellum, nearly in 

 the lines of the sets b. Clitellum developed all round the 

 body, and occupying segments xiv.-xvii. The interseg- 

 mental furrows xiv.-xv., xv.-xvi., and xvi.-xvii. are neaily 

 obliterated. 



Male pores on small papillae on the xviii. segment, about 

 equally distant from the two bundles of seta?. A second pair 

 of papillae on the xix. segment, close laterally to the vential 

 setse b. These pa[)ill£e are prolonged forwards and obliquely, 

 and thev are connected on each side with the anterior papilla 

 (PI. XIII. fig. 4). 



Female pores on the xiv. segment, a little forwards and 

 internally lo the first ventral setse (a). These pores are 

 situated in a small transverse-oval area, which is rather more 

 distinct than the clitellum (PI. XIII. fig. 4). 



A pair of spermathecal pores on the viii. segment, in the 

 zone of the seta:", between the lines of setai b and c. 



Internal anatomy. — First septum v.— vi. very thin; septa 

 vii.-viii. — xii.-xiii. thickened. A not very strong gizzard 

 in the v. segment. Intestine without typhlosole. 



Nephridial system uieganephric. 

 Ann. ct' Maff. X, Hi^it. !Ser. 8. Vol. vii. 33 



