906 ME. T. E. BEBDAED ON THE [Dec. 4, 



(12) Amyntas minutus, n. sp. 



Of this very small species I have examined only a single speci- 

 men, which is 48 mm. in length. I counted 103 segments. The 

 Bets upon the anterior segments are very large. 



The clitellum occupies the whole of segments xiv.-xvi. It has 

 Betse upon it. The median region of the xvith segment is not 

 invaded by glandular tissue, so that it presents the appearance of 

 a papilla. There is a swollen area of corresponding position and 

 extent upon segment xvii. 



Apart from these there are a series of paired genital papilla' 

 which follow the male pores upon segments xix.-xxi. They are 

 paired upon the first two segments, but the xxist has only the 

 left-haud one. They are much smaller than the male pores and lie 

 nearer to the middle line. 



The male pores are very large indeed. They are shallow but 

 large depressions borne upon very conspicuous porophores. They 

 are sucker-like in appearance. 



With regard to the internal structure, I have been able by 

 dissection to note the principal structural features which fix the 

 position of and distinguish the present species. I am not certain, 

 however, whether the gizzard-septum is present. The gizzard 

 itself is large and typically ' perichaetous ' ; the failing or vanished 

 gizzard of some small Earthworms is sometimes put down to small- 

 nessof size and consequent simplification by degeneration ; instances 

 like the present appear to show that the reduction of the gizzard 

 is rather to be referred to difference of habitat and food. The 

 intestine has no ccca. I could not fix the position of the last 

 heart. 



There are undoubtedly three pairs of large sperm-sacs, which lie 

 in segments x.-xii. 



The spermiducdl [/lands are large, loose in texture, and much 

 incised. The duct is rather long ; it runs forward and then back, 

 opening directly "on to the exterior, and not by the way of a 

 terminal sac. The gland itself extends through segments xvi.-xxi. 



The spermatheca present the unusual character of being massed 

 in considerable numbers in a single segment. There are 6-10 

 pairs of them, not only in segments vi. & vii. as in A. stelleri, but 

 also in segment viii. behind the last thick septum and alongside of 

 the gizzard. 



Hab. Aring. 



The following will be the definition of 



Amyntas minutus, n. sp. 



Length 48 mm.; number of segments 103. Setae on anterior 

 segments larger. Clitellum xiv.-xvi., with setae. Papilla? paired 

 on xix.-xxi., smaller and nearer to the middle line than the 

 prominent, widely separate male pores. Caeca absent. Sperm-sacs 

 in x.-xii. Spermiducal glands xvi.-xxi., with longish duct and no 

 end-sac. Sperinathecae 6-10 pairs in each of segments vi.-viii. 



Hab. Malay Peninsula. 



