1900.] EARTHWORMS OF THE GENUS AMY> T TAS. 623 



21. Amyntas enganensis Rosa. 



Perichceta enganensis, Rosa, A.nn. Mus. Civ. Genova, (2) xii. p. 546. 



170 mm., 140 segments. Stoutish worm. Setae 80 on ix. 

 Spermiducal glands small. Apertures of spermathecae close 

 together in middle line (2 mm. apart) ; diverticulum longer than 

 spermathecae. 



Hob. Engano. 



Of this form, which is obviously near to A. heterochoztus, but 

 different by reason of the close approximation of the spermathecal 

 orifices and of the male pores, Dr. Rosa has described a dark- 

 coloured variety, tetra. 



22. Amyntas pictus Mich. 



Megascolex pictus, Michaelsen, Arch. f. Naturg. 1892, p. 246. 



Amyntas pictus, id. Jahrb. Hauib. wiss. Anst. xvi. p. 83. 



240 mm., 137 segments. Setae slightly larger anteriorly, 66 on 

 v., 79 on xxv. Clitellum xiii.-xviii. Spermiducal glands hardly 

 extend beyond xviii. Diverticula of spermathecae bifid. 



Hob. Borneo. 



This species was originally placed in the genus Megascolex 

 on account of the slight dorsal gaps in the seta-rows, and, I 

 presume, the form of the spermathecal appendix. The gizzard, 

 however, is like that of Amyntas in position. Another very note- 

 worthy feature in the species is the long clitellum. As only one 

 specimen of this worm has been seen, it is unnecessary to comment 

 at length upon its characteristics. 



23. Amyntas dyeri Beddard. 



Perichceta dyeri, Beddard, P. Z. S. 1892, p. 157. 



Perichoita sinensis, id. ibid. p. 158. 



Perichceta monilicystis, Michaelsen, Arch. f. Naturg. 1892, p. 251. 



Perichceta dyeri, Michaelsen, Abh. Senck. nat. Ges. xxi. p. 230. 



Perichoita shimaensis, Goto & Hatai, Ann. Zool. Jap. iii. p. 15. 



126 mm., 104 segments. Setae larger anteriorly, those setae 

 being ornamented ; 35 on v., 50 on xxi. One or two pairs of large 

 concave genital papillae behind or also in front of male pores. 

 Spermathecae opening very dorsally in position. Diverticulum 

 often moniliform. 



Hob. Japan, China, AVest Africa, British Guiana, West Indies, 

 Madagascar, Europe. 



There is no manner of doubt as to the inclusion of the three 

 species, sinensis, dyeri, and monilicystis, under one head. It was 

 mainly the colour that led me to differentiate the two which bear 

 my authorization. The moniliform diverticulum is not a specific 

 character, but an occasional condition. The existence of one 

 pair of papillae is commoner than two pairs. I found individuals 

 with only one pair, with two pairs, aad some in which there was 

 an a^vmmetrv, onlv one of the anterior pair being present. The 



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