DESCRIPTIONS OF GENERA AND SPECIES 079 



Genus GLYPHIDRILUS, HORST. 



DEFINITION. Setae paired. Clitellum, XXII-XXXII. Nephridia defective in 

 the first fourteen segments. Spermathecae numerous in segments XIV-XIX. 

 Male pores on XXVII, XXVIII. Sperm-ducts imbedded in longitudinal 

 muscular layer, opening with a small spermiducal gland on each side. 



This genus is in several respects remarkable. It is at present known only by 

 a single species, 0. iveberi. The extremely posterior position of the male pores 

 distinguish it, though in Kynotus madagascariensis they come very near to this 

 species in position, opening, as they do, upon the twenty-fifth segment. The 

 genus, however, differs from Kynotiis in having setae on the anterior segments of 

 the body. The fact that the nephridia do not begin until the fifteenth segment ia 

 a point of resemblance to some of the lower forms of Oligochaeta irrespective of 

 family. It is noteworthy that the present genus is, at any rate, occasionally aquatic 

 in habit. No mention is made of any modified setae. A unique feature in the 

 genus, which may be varietal (though HOKST says nothing about the number of 

 specimens in which he found it), is the apparent existence of an additional pair of 

 testes and sperm -duct funnels in the ninth segment ; the funnels were not seen to 

 have any connexion with the sperm-duct ; but ' a folded membrane lined with a 

 layer of ciliated cells ' opposite to a compact body which resembles a gonad can 

 hardly be other than a rudimentary funnel. The spermiducal gland is small, and 

 receives the sperm-ducts of its side just before it opens on to the exterior ; nothing 

 could be made out as to its minute structure. The clitellum is bounded below by 

 a long ridge, which is no doubt equivalent to the tubercula pubertatis of other 

 worms. The other characters of the worm will be given under the description of 

 the single species. 



Glyphidrilus weberi, HORST. 

 G. Weberi, R. HORST, Zool. Anz., Bd. xiv, 1891, p. n. 



Definition. Length, 120 mm.; number of segments, 250. Setae further apart anteriorly 



than posteriorly. Gizzard in VIII; no calciferols glands; intestine begins in XF. 



Last heart in XII, Hal). Java ; Sumatra ; Floret ; Celebes ; terrestrial and aquatic. 



Of the external characters not mentioned in the diagnosis of the species or genus 



the dorsal anus is the most remarkable. This recalls the genus Criodrilue ; it is 



figured by HORST (17) as a triangular and large opening, the wider part being posterior. 



