DESCRIPTIONS OF GENERA AND SPECIES 719 



Definition. Length, 180 mm. ; number of segment*, 250. Colour a dark, green reddish below ; 

 clitellum flesh-coloured. Setae strictly paired. Clitellum, XXXVII-XL71. Hob. 

 Hungary ; in mart/thy spots. 



This species, as will be evident from the above, is but ill-defined. ROSA (15, p. 55) 

 considers that the tubercula pubertatis are in the form of a continuous ridge along 

 the clitellum, which is referred to by OERLEY, though the latter states that there are 

 no tubercula. The position of the clitellum, however, coupled with the strictly paired 

 setae seems to mark out the species as distinct. 



(45) Allolobophora mediterranea, OERLEY. 

 A. mediterranea, OERLEY, Zool. Anz., 1881, p. 286. 



Definition. Length, womm.; number of segments, 120. Setae strictly paired. Clitellum, 

 XXIII-XXXI. Tubercula pulertalis on XXIX, XXX, XXXI. Hab. Balearic Ittet. 



(46) Allolobophora frivaldszkyi (OEBLEY). 



Lumbricus terrestris, var. gigas, OERLEY, MT. Akad. Math, xvi, 1880, p. 582. 

 Octolasion Frivaldszkyi, OEULEY, Ert. termesz. Kor., xv, 1885, p. 17. 



Definition. Length, 360 mm.; diameter, 20 mm.; number of segments, 260. Setae distant: 

 1-2 > 2-3 and 3-4. Clitellum, XX7III-XXX7. Tubercula pubertatis, XXVIII-XXXf. 

 Hab. Hungary. 



(47) Allolobophora gracilis (OERLEY). 

 Octolasion gracile, OERLEY, Ert. termesz. Kor., xv, 1885, p. 18. 



Definition. Length, jomm.; number of segments, 180. Setae not strictly paired. Clitellum, 

 XXX-XXXV. Tubercula pubertatis, XXX-XXX7. Hab. Hungary and Holland. 

 This species is evidently, as ROSA (15, p. 63) suggests, near to A. cyanea. Octolasion 

 rubidium of OERLEY (2) is probably merely a variety of this species, as ROSA 

 (15, p. 64) has pointed out. Its clitellum and tubercula are exactly the same in 

 position and extent ; it was met with in Hungary and at Woolwich. The prostomium 

 is stated to be larger and to occupy two-thirds instead of one-half of the buccal 

 segment, but no salient points of difference can be extracted from the description. 

 As ROSA, who has had so much experience in this family, recognizes the species 

 ' rubida ' (though as he points out its name will have to be changed) I prefer to leave 

 the matter undecided. 



