1 14 Mr. F. E. Bcddard on the 



^^IJypogcvon heterosltclion " is not a species of Perrier's 

 genus Titanus^^^ which Rosa has recently shown f to be iden- 

 tical with Gecscolex of F. S. Leuckart ;}:, as might be inferred 

 from Schmarda's diagnosis, but belongs to the genus Anteus. 

 There arc three or four specimens of this species in the collec- 

 tion from Ecuador and the Cordilleras. 



It a])])cars to differ from Anteus (ji'jaf^j the only species of 

 the genus at present known, and may be described as 



(1) Anteus hetorostichon (Schm,). 

 (PL Yll. figs. 1 and 7). 



JIypor/(con heterostichon, Schmarda, Neue wirb. Thiere, Bd. i. Iliilfteii. 

 p. i2. 



The species is about 10 inches or so in length, with a 

 diameter of 12 inillim. anteriorly. 



The colour (in spirit) is yellowish white anteriorly and 

 bluish posteriorly ; the blue colour is due to the thinness of 

 the integument and the dark colour of the intestinal contents. 

 There appears in fact to be no pigment in the skin at all. 

 The setaj have precisely the arrangement which characterizes 

 the other species, as is indeed set forth in Schmarda's dia- 

 gnosis quoted above. 



The setce present the form which is illustrated in fig. 7 ; 

 they are perhaps rather stiaighter (less curved) than in many 

 other earthworms ; fig. 7 c represents the free extremity of 

 the seta more highly magnified ; it is seen to be covered with 

 faintly marked ridges. The genital seta, which occur upon 

 the clitellum, are rather more than twice as long as the ordi- 

 nary seta^ ; tlie ])roportions are as indicated in figs, la and h : 

 a is of course a clitellar seta ; the basal portion of this seta is 

 curved, the rest of the shaft is nearly straight ; at the free 

 extremity the ridges are very strongly marked. The setje 

 apjjcar to be precisely like those of Aniens (/i<jas^ and of 

 lUiinodrilus ||. 



The nephridiopores, which commence upon the first seti- 

 gerous segment, are placed as in the genus Anteus, in front of 



* " M(5moires pour servir a rbistoh'e des Lorubricieus tenestre?," 

 Nouv. Arcli. Mus. t. viii. p. 57. 



t " Sul Geoscolex ma.vimus, Leuck.," Boll. Mus. Zool. Torino, vol. iii. 

 no. 40. 



I ^'Geoftcole.r, Leuck., ein neues Geschlocht von Eingr^viirmorn," Zool. 

 Bruchistiicla', llel't ii. 



§ " Dosciiptions of Eai'thworms. — YI. Ou Ant(cus r/iffas,'' Pernor, 

 Notes Li'vdt'u I\Ius. vol. xiii. p. 77 ; IVnier, ioc. a'f. pi. i. figs. 10, 1 1. 



II "On tlie Structure of a new Genus ol' Luuibrlcidtv (T/iaumodri/us 

 G'u/ieh/u')," Pioc. Zool. Soc. li?87, p. \o4. This worm is really a Ji/tino- 

 diilus. 



