MONILIGASTER HOUTENII. 101 



coiled duct. The prostate-glands of M. Houtenii may per- 

 haps be identical with the elongate, yellow reservoir (ve- 

 sicule seminale), communicating with the second pair of 

 testes in M. Deshayesi Perr. and opening exteriorly by a 

 pore between the lO^'i and lltli ring. In M. Barwelli 

 Bedd., like in our specimen, only a single pair of tes- 

 tes is to be found , furnished with a thin , coiled vas 

 deferens , that opens on to the exterior between the 9^ii 

 and lOtti segment, in the vicinity of a small, oval gland 

 (prostate). 



Finally it may be pointed out, that besides the dispo- 

 sition of the gizzard , there are some other points in the 

 structure of M. Houtenii in which it agrees with M. Des- 

 hayesi'. \° the structure of the skin in the anterior part 

 of the body differs from that of the other segments by 

 being much thicker (the hypodermis as well as the mus- 

 cular layer), resembling somewhat, as stated by Perrier, 

 the clitellum of other Lumbriciuae; 2° the numerous trans- 

 verse bands, having the appearance of septa, by which 

 the pharynx is attached to the body- wall; 3° the absence 

 of a clitellum. However on the last character (although 

 also present in M. Barioelli) not much reliance can be 

 placed , because it is a negative one and our specimen 

 might be in an immature state. If our specimen belongs 

 to the genus MonHig aster ^ as I believe, it undoubtedly 

 represents a gigantic form , M. Deshayesi Perr. measuring 

 150 m.m. and M. Barioelli Bedd. only 37 m.m. 



Rhinodrilus 7 enkatei, n. sp. 

 (Plate 1, fig. 4—8). 



We owe to the kindness of Dr. H. ten Kate, the well- 

 known traveller, a number of earthworms from Surinam, which 

 appear to be referable to the genus Rhinodrilus. This genus , 

 belonging to Perrier's Lombriciensintraclitelliens'), is 



1) loc. cit. p. 65. 



Notes from tlie Leyden IMuseuiu , "Vol. IX. 



