1892.] NEW SPECIES OP EARTHWORMS. 147 



one pair in somite ix. — one somite anterior to that of M. rappi. In 

 M. beddardi, however, the gland is partly in somite ix. and partly 

 in somite x., occupying, as it were, an intermediate position between 

 that of the other two species. 



The genital organs. — There are apparently three pairs of sperm- 

 sacs, but in reality only two pairs are present, each sac being con- 

 stricted into a larger anterior portion, and a small posterior and more 

 A'entrally situated lobe. The two larger sacs (Plate VIII. fig. 13, 

 A, E) lie in somites x. and xi. ; the posterior lobes, constricted by 

 the septa, lie in somites xi. and xii. ((7, D). There are no median 

 sacs. 



The two pairs of testes and of ciliated rosettes, which lie in somites 

 x. and xi., are enclosed in the larger portions of the sacs. 



In M. rappi there is the same kind of subdivision of the sperm- 

 sacs, the anterior lobe, however, of each being the smaller and 

 containing the testes ; they occupy (according to the amended 

 numbering of the somites) the same position as in the present 

 species. 



The two sperm-ducts of one side unite in somite xii., but I was 

 unable to trace them onwards ; tliey have no connection with either 

 of the copulatory apparatus mentioned above. 



The spermathecce have the same arrangement as in the other 

 species ; that is, a row of ten or twelve very small oval sacs on the 

 anterior mai'gin of each side of somites xiii. and xiv. 



In M. rappi there are fewer in each row, but four rows on each 

 side, and some of them are curved. Similar spermathecse exist in 

 Brachydrilus ^ and in Kynotus. 



C. MiCROCHiETA BELLI, n. Sp. 



This species agrees in its anatomy very closely with M. beddardi, 

 I name it after my friend Prof. Jeffrey Bell, who has enabled me to 

 examine and study a large number of Earthworms presented to the 

 National Collection ^. 



Its length is 8 inches and its diameter is | inch. 



It had apparently been allowed to become dry at some period 

 before it reached me, as the worm is much shrivelled, and a dark 

 brown, hardened, plate-like structure occupies the dorsal surface of 

 somites xiii. to xxi. and part of the next somite ; this " saddle " 

 extends laterally as far as the nephridiopores, or line of the outer 

 chsetse. This brown area appears to represent the clitellum. Along 

 the lateral boundary of part of the clitellum is a broadish band, having 

 a glandular appearance, crossing the somites xv., xvi,, xvii., xviii., 

 and part of xix. This recalls the tubercula pubertatis of the Lum- 

 bricidee, and a similar structure is already known in Rhinodrilus 

 and Hormogaster, and Horst speaks of something of the sort in 

 Glyphidrilus^ . On the ventral surface these segments, though dis- 



^ Benham, " An Attempt to Classify Earthworms," Q. J. M . Sc. xxxi. p. 256, 

 fig. 28. 



^ The specimens of M. papillata and M. belli are now in the collection of the 

 British Museum. 



^ In M. benhami, Eosa, toe. cit. also describes tubercula pubertatis. 



