ON THE GENUS NOTOPYGOS. 243 
c. Anus situated on segment 23 or intersegm. groove 
23/24. 
4. cirratus, n. sp. Malay Archipelago. 
5. maculatus Kinb. |. c. Panama, Philippines (Grube) ’), 
Amboina (Malaguin et Dehorne)?). 
6. sibogae, n. sp. Malay Archipelago. 
d. Anus situated on segment 24. 
7. Gardineri Potts, loc. cit. p. 362, pl. 45, fig. 8; 
pl. 46, figs. 6—8. Amirante Islands. 
e. Anus situated on segment 25 (22 to 25 Potts). 
8. gigas, n. sp. Malay Archipelago. 
9. variabilis Potts. Maldives. 
jf. Anus situated on segment ? . 
10. flavus Hassw. Proc. Linn. Soc. of N. S. Wales, 
III, 1879, p. 341. Darnley Island. 
11. labiatus MelInt. Challenger Annelida, p. 19, pl. II, 
he Os pl LV, feo 2 pls lia, Hes. o, 6. 
Basilan Strait; Amboina (Mal. & Deh.). 
C. Branchiae commencing on the 6th segment. 
a. Anus situated on segment 21. 
12. hispidus Potts, loc. cit. p. 359, pl. 45, figs. 6, 7; 
pl. 46, figs. 3—5. Amirante Islands. 
b. Anus situated on segment ? . 
13. megalops Melnt. loc. cit. p. 17, pl. I, fig. 1; 
pl. ILA, figs. 3, 4. Off the Bermudas. 
With regard to Notopygos (Lirione) splendens Kinb. we 
know neither the situation of the first branchia nor that of 
the anal pore. 
Notopygos parvus Hassw., from Tacking point (loc. cit.), 
certainly does not belong to this genus and, as is suggested 
by Hasswell himself, may probably turn out to be the 
type of a new genus. 
1) Beiträge zur Annelidenfauna der Philippinen, p. 8, pl. 1, fig. 3. 
2) Annélides d’Amboine: Revue Suisse de Zoologie, t. XV, 1907, p. 357. 
Notes from the Leyden Museum, Vol. X XXIII. 
