1892.] NEW SPECIES OF EARTHWORMS. 143 



probably is somite i., and the next two annuli belong to somite ii. 

 (see pi. XV. fig. 1 of my paper, loe. cit.). 



The chaetse of both the new species differ from those of the 

 previous species in the presence of an "ornamentation," similar to 

 that of the chsetse in Rhinodrilus^ , and consisting of longitudinal 

 rows of obliquely transverse ridges^. 



The ditellum is evidently not fully developed, but the interseg- 

 mental grooves on the dorsal surface of somites xix. to xxviii. 

 are partially obliterated (this area includes the 26th to 35th annuli). 

 Along each side of the body there is a very pronounced latero-ventral 

 ridge extending across somites xvi. to xx., the body being here 

 flattened, though probably the appearance, as represented in the 

 figure (Plate VII. fig. 5, t.p.), is less marked during life. This 

 ridge is glandular and appears to correspond with the structures 

 known as the " tubercula pubertatis " in Lumbricus, Allolobophora, 

 Rhinodrilus, &c. 



Bv teasing up the body-wall, and by the examination of sections, I 

 find the clitellar cells to occur over a much wider area than that 

 represented by the above numbers, viz. as far forwards as somite x., 

 so that we may, I think, conclude that the clitellum, when fully 

 developed, covers the somites x. to xxx. This agrees closely with 

 the extent of the same organ in M. rappi as described by Beddard ; 

 in the specimen examined by myself it occupied somites xiv. to 

 xxvi.^ In M. beddardi the clitellum is less extensive, covering 

 somites xi. to xxiii. ; but in neither of these species did I find the 

 limits well defined. 



Although I did not observe, when I was engaged upon the previous 

 species, anything like tubercula pubertatis, yet I figured for M. 

 rappi * the ventral edges of the clitellum as being well marked and 

 thickened ; a re-examination, too, of specimens of M. beddardi re- 

 veals, though in a very indistinct manner, owing to their very poor 

 condition, a band along each side of the clitellum, which is no doubt 

 of the same nature. 



The nephridiopores are, as in the other two species, very distinct 

 even along the clitellum ; they are placed in front of the outer 

 chsetge, i. e. along the sides of the body, the first nephridiopore 

 occurring in somite iii. There are no dorsal pores, nor could I detect 

 any of the generative apertures. But on either side of each of the 

 somites x. and xxiii., that is on the somites which carry the 8th and 

 21st nepbridiopores respectively, occupying the position of the inner 

 chsetse, is a rounded papilla (Plate Vil, fig. 5, cp., cp .), slightly pitted 



' Perrier, " Lomb. terr.," Nouv. Arch. d. Museum, 1872, pi. i. fig. 11 ; Horst, 

 Notes from Leyden Museum, 1887, pi. i. fig. 7. 



- Mr. Beddard has recently described, in the ' Anuals & Mag. Nat. Hist.' Feb. 

 1892, ornamented cheetae in Anteus, Geoscolex, and Fontosoolex, Sclimarda 

 (Tlrochmta, Perrier). 



3 As I have remarked in my " Attempt to Classify Earthworms," we must 

 increase the numbers given in my description of M. rappi by one, as the 

 apparent first somite is in all probability somite i. and ii., the chgette of somite 

 ii. having disappeared. 



* Loc. cit. pi. XV. fig. 1. 



