362 W. BLAXLAND BENHAM. 



wrong, owing to my having followed Dr. Horst's account of 

 M. Houtenii, which appears to have the organs posterior to 

 their position in the other species. 



This octochsetous, raeganephric genus is distinguished, as 

 has been pointed out by recent writers, by the following ex- 

 ternal characters : 



(«) The male pores (a single pair) between Somites x 



and XI. 

 {b) A single pair of spermathecal pores between Somites 

 vii/viii. 



(c) A pair of oviducal pores between Somites xi and xii. 



(d) Nephridiopores in line with the dorsal (or outer) 



couple of chsetse. 

 Internally the following features may be taken as charac- 

 teristic : 



(e) The gizzard constricted by one to four narrow, fibrous, 



annular bands at the septa, giving the " moniliform " 

 appearance indicated by the generic name. 



(/) Absence of calciferous or other enteric diverticula. 



[g) A single pair of spermathecse in Somite viii, with 

 very long, narrow ducts. ^ 



(h) A single pair of sperm-sacs, supported by the septum 

 between Somites ix and x, but belonging to the 

 former; the sacs are independent, and each encloses 

 the testis and the spermiducal funnel. 



(i) A single pair of atria (prostates), of varied size and 

 shape. 



{j) A large ovisac, which may extend through several 

 somites. 

 M. indicus, n. sp., which forms the subject of the present 

 paper, may be diagnosed as follows : 



(o) Length 5^ inches (13-75 centimetres). 



{b) Body consists of about 150 somites. 



(c) Ventral intersetal space is rather wider than the 

 lateral space (or, as a formula, I — I > 11 — III). 

 1 The apparent exception in M. japonicus, Midi., requires further in- 

 vestigation. 



