620 MR. E. E. BEDDARD ON THE [May 22, 



Amyntas pulcher, Michaelsen, Jahrb. Hamb. wiss. Anst. xvi. p. 16. 



Perichceta sangirensis, Michaelsen, Jahrb. Hamb. wiss. Ansfc. viii. 

 p. 334 ; id. ibid. xvi. p. 76. 



P. vitiensis, Beddard, Ann. Nat. Hist. (6) ix. p. 131. 



P. crassicystis, Michaelsen, Abh. Senck. nat. Ges. xxiii. p. 204. 



P. malamaniensis, Benham, Journ. Linn. Soc, Zool. xxvi. 

 p. 213. 



P. ariuri, id. ibid. p. 205 ; Beddard, Willey's Zool. Ees. 

 p. 184. 



P. atheca, Bosa, Ann. Mus. Civ. G-enova, (2) xvi. p. 520. 



P. zonoporus, Bosa, Ann. Nat. Hist. (7) ii. p. 283. 



? Perichceta sangirensis, Horst, Notes Leyd. Mus. xv. p. 317 : and 

 Zool. Ergebn. p. 68. 



Megascolex montanus, Vaillant, Anneles, 1889, p. 69. 



90-150 mm., 110-113 segments. Setae larger on anterior 

 segments, with slight dorsal gap. 30 on v., 60 on xxvi. Sperm- 

 sacs often with dorsal process. Septum viii./ix. ofteu present. 

 Spermiducal glands usually divided completely into two halves. 

 Duct much bent, terminal sac with a penis. Spermathecal diver- 

 ticulum nearly as long as or as long as pouch. 



Hab. Celebes, Sumatra, Sangir, Halmahera, Ternate, Malaman, 

 New Britain, Viti, Upolu, Tahiti. 



I cannot see bow the forms in the above list can be separated. 

 They have, for the most part, a rich violet colour, often showing 

 bandings. As a rule the worms are fairly stout, and the measure- 

 ments and the number of setae agree, except in minutiae, in the 

 various descriptions. It may be that it will be necessary to 

 distinguish those forms in which the spermiducal gland is not 

 divided into two from the others. It is not clear, for example, 

 whether this is or is not the case with zonoporus. The alleged 

 greater complexity of the penial apparatus in some individuals 

 from others seems to me to be not quite certain from the data. 



I have been able to dissect (through t he kindness of Dr. Michaelsen) 

 two individuals labelled by him Perichceta sangirensis. They differ 

 from such examples of arturi (very badly preserved) as I have 

 seen by the fact that the terminal muscular bursa, appended to the 

 spermiducal gland, is relatively small and rounded, and without a 

 projecting penial sac. However, this sac was distinctly less obvious 

 in some specimens. And there is a further reduction of it, as 

 shown by Benham's figure of the corresponding parts of malamani- 

 ensis. Perichceta novarce as described by Michaelsen seems to 

 have a larger and rather more complex terminal bursa, like those 

 of arturi and malamaniensis, and not like the smaller bursa of 

 mv vitiensis, which is more after the fashion of sangirensis. 



If a line of division is to be made at all, I should unite arturi, 

 malamaniensis, and novarce, leaving the others to form a second 

 group. 



