498 



OLIGOCH AETA 



Spermathecae in viii, ix. 



Spermathecae in v-ix. 

 Spermathecae in vii-ix. 



Spermathecae in vi-ix. 



C. victoriensis 

 C. obscurus 

 C. Iralmoi 

 C. insignis 

 C. singularis 

 C. illawarrae 

 C. mudgeanus 

 C. simulans 

 C. saccarius 

 C. pygmaeus 

 C. camdenensis 

 C. dubius 

 C. gravidis 

 C. rusticus 

 C. cameroni 

 C. mediterreus 

 C. canaliculatus 

 C. sloauoi 

 C. tryoni 

 C. manifest us 

 C. fletcheri 



Sperm-sacs in xii. 



Sperm-sacs in xi, xii. 



Sperm-sacs in ix, xii. 



Nephridia paired. 



(a) With paired nephridia. 

 (i) Cryptodrilus mediterreus, FLETCHEB. 

 C. mediterreus, FLETCHER, Proc. Linn. Soc. N. S. W., ii (2), 1888, p. 614. 



Definition. Length, no mm.; diameter, 5 mm.; number of segments, 150. Proslomium 

 incomplete. Clitettum, XIII -XVII, complete. Setae of outer couples further apart than 

 of inner. Male pores dorsad of setae 2 ; median papillae on VI-IX, a pair on X, XI, 

 and on anterior margin of XVIII, XIX, ventrad of male pores. Dorsal pores commence 

 V/VI. Gizzard in V ; calcifercms glands in X-XIII ; intestine begins in XVIII. 

 Nephridia paired and alternate. Last hearts in XIII. Septa, VI/XIII, thickened. 

 Sperm-sacs in XI, XII ; Spermathecae, VII-IX, caecum minute. Penial setae present, 

 with serrated extremity. Hah. Darling river, N. S. W. 

 This species differs from the remaining forms which are associated with it by the 



character of their nephridia in having penial setae and in having sperm-sacs in x, xii, 



instead of ix, xii. 



