80 TEANSACTIONS LIVEEPOOL BIOLOGICAL SOCIETY. 



these two pairs are lying immediately behind one another, 

 somewhat posterior to the middle of the tail, which, as I 

 have already remarked, tapers considerably behind the 

 papillae, to terminate in an acute point. The vulva is 

 situated rather far backwards, and its distance from the 

 extremity of the tail measures constantly a little more 

 than one-fourth and a little less than one-third of the 

 whole body-length, whereas the distance bettveen the vulva 

 and the anus appears always nearly one and-a-half times 

 as long as the oesophagus and longer than the tail. The 

 thin- walled vagina extends obliquely forward. The sexual 

 tube, that is not renexed, extends till near the anterior 

 end of the intestine, and the uterus bears a posterior 

 branch, which is a trine longer than half the distance 

 between the vulva and the anus (PI. Ill, fig. 1). This 

 species is oviparous. The eggs are slightly arcuate, a little 

 more than three times as long as broad, and O07 — - 075 

 mm. long ; they are rounded on the extremities. 



Numerous individuals, both males and females, as well 

 as young asexual larvae, were observed by me in the 

 dis-organized humus-like tissue of the Galanthe. The 

 movements of these worms are rather sluggish. 



From all other species of the genus Aphelenchus hitherto 

 observed in Europe, Aphel. tenuicaudatus at first sight 

 may be distinguished by the elongated, slender, finely 

 terminating tail. Last year, however, another new 

 species of this genus was described by Mr. Cobb,* under 

 the name of Aph. longicaudatus, in which the tail-end 

 is likewise hair-like in both sexes, and appears even com- 

 paratively somewhat longer than in Aph. tenuicaudatus. 

 In that species discovered by Cobb in soil about banana 



* Cobb, Nematodes, mostly Australian and Fijian, Sydney, 1893, p. 54., 

 PI. VII. (Department of Agriculture, New South Wales. Miscellaneous 

 Publications, No. 13.) 



