114 Mr. F. E. Beddard on the 
“TTypogwon heterostichon”’ is not a species of Perrier’s 
genus 7ttanus*, which Rosa has heteehi hy shown f to be iden- 
tical with Geoscolece of F. 8. Leuckart ¢, as might be inferred 
from Schmarda’s diagnosis, but belongs to the ¢ genus Anteus. 
There are three or four specimens of this species in the collec- 
tion from Eeuador and the Cordilleras. 
It appears to differ from Anteus gigas, the only species of 
the genus at present known, and may be described as 
(1) Anteus hetorostichon (Schm.). 
(Pl. VII. figs. 1 and 7). 
Hypogeon heterostichon, Schmarda, Neue wirb. Thiere, Bd. i. Halfte ii. 
p. 12. 
The species is about 10 inches or so in length, with a 
diameter of 12 millim. 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 sete have precisely the arrangement which characterizes 
the other species, as is indeed set forth in Schmarda’s dia- 
gnosis quoted above. 
The sete present the form which is illustrated in fig. 7; 
they are perhaps rather straighter (less curved) than in many 
other earthworms ; fig. 7 ¢ represents the free extremity of 
the seta more highly magnified ; it is seen to be covered with 
faintly marked ridges. ‘The genital sete, which oceur upon 
the clitellum, are rather more than twice as long as the ordi- 
nary sete ; the proportions are as indicated in figs. 7a and 6: 
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 sete 
appear to be precisely lke those of Anteus gigas§ and of 
Rhinodrilus ||. ; 
The nephridiopores, which commence upon the first seti- 
gerous segment, are placed as in the genus Auteus, in front of 
* “Mémoires pour servir & Vhistoire des Lombriciens terrestres,” 
Nouv. Arch. Mus. t. viii. p. 57. 
Tt “Sul Geoscolex maximus, Leuck.,” Boll. Mus. Zool. Torino, vol. iii. 
no. 40. 
{ “Geoscolex, Leuck., ein neues Geschlecht von Ringwiirmern,” Zool. 
Bruchstiicke, Heft ii. 
§ “Descriptions of Earthworms.—VI. On Anteus gigas,’ Perrier, 
Notes Leyden Mus. vol. xiii. p. 77; Perrier, oe. cit. pl. i. figs. 10, 11. 
|| “On the Structure of a new Genus of Lumbricide (Thamnodr alus 
Gulielmt),” Proc. Zool. Soc, 1887, p. 154. This worm is really a Rhino- 
drilus. 
