DESCRIPTIONS OF GENERA AND SPECIES 621 



Alvania millsoni, Beddaud. 

 A. Millsoni, Beddaed, Q. J. M. S., vol. xxxiv, 1893, P- *7^- 



Definition. Length,^ a in. No integumental pigment. Setae on seventeenth segment absent, 

 the lateral setae of segments XV, XVI also absent. Hob. — Lagos. 



The above definition of the species is, of course, not insisted upon as being of 

 more than temporary value. 



Genus Telbudrilus, Rosa. 



Defhtitiou. Setae in eight series. Male pore on XIX. Spermathecal pore on 

 XIV/XV. Caleiferous glands paired in XIII, unpaired pouches in IX-XI. 

 Ovarian sac communicating with egg-sac. Spermiducal glands opening into 

 a terminal bulbus of complicated structure. No penial setae. 



This genus was the second genus of the family to be described. It contains 

 only one species, for a knowledge of which we are entirely indebted to Rosa. The 

 female organs of this genus show certain peculiarities. The sacs which involve the 

 ovaries lead through a slender duct to the egg-sacs, and not to the spermathecal 

 sacs; the oviducal funnel opens pai-tly into the egg-sacs, and partly into the some- 

 what dilated end of the egg conduit, which is, I presume, the ' Ovarialblase ' of 

 MiCHAELSEN; from the funnel the oviduct passes to the exterior, opening on to the 

 intersegmental groove xiv/xv. The spermathecal sacs open on to the exterior through 

 a muscular walled terminal sac as in other Eudrilidae ; from each spermathieca, near 

 to where it merges into the atrium, arises a short diverticulum which Rosa states 

 to end near to the egg-sacs ; it seems possible that these supposed diverticula really 

 open into the egg-chamber; that, at any rate, is what the analogy of other species 

 of Eudrilids would suggest. 



The male organs of Tdevdrilus conform generally to the type met with in the 

 more highly organized members of the family ; there are two pairs of testes ; the 

 two pairs of sperm-ducts perforate the septa to which are attached the testes twice, 

 and the proximal part of the duct forms a rather dilated chamber. The two pairs 

 of sperm-sacs depend from septa x/xi, xi/xii, the anterior pair of testes appear to be 

 enclosed in a delicate sac which communicates with the anterior sperm-sacs. The 

 terminal apparatus is perhaps more complicated than is usual ; there are two spherical 



