1900.] EARTHWORMS OF THE GENTJS AMYNTAS. 639 



74. Amyntas nanus Eosa. 



PericJiceta nana, Eosa, Ann. Mus. Civ. Genova, (2) xvi. p. 519. 



30 mm., 95 segments. Setae with slight dorsal and ventral gaps, 

 36 on xii., 32 on xxv. 6 setae between male pores. Dorsal pores 

 from vii./viii. Spermiducal glands in xvii.-xxi., with slightly bent 

 duct. Diverticulum longer than spermatheca. 



Hah. Sumatra. 



L. Spermathecaj numerous in vi., vii. 



75. Amyntas stelleri Mich. 



Perichceta stelleri, Michaelsen, Jahrb. Hamb. wiss. Anst. viii. 



p. 337. 



Perichceta bararni, Michaelsen, Abh. Senck. nat. Ges. xxiii. 



p. 203. 



PericJiceta stelleri, Horst, Notes Leyd. Mus. xx. p. 205 ; Michael- 

 sen, Abh. Senck. nat. Ges. xxiii. p. 202. 



Perichceta everetti, P. papillata, P. saraivacensis, P. Jcinabaluensis, 

 Beddard, Mon. Olig. p. 428. 



Perichceta everetti, P. papillata, P. saraivacensis, P. linabaluensis, 

 Beddard & Fedarb, Ann. JNat. Hist. (6) xvi. p. 69 etc. 



Amyntas stelleri, Michaelsen, Jahrb. Hamb. wiss. Anst. xvi. 

 p. 36. 



115-300 mm., 160 segments. Setae with slight dorsal gaps, 

 those of anterior segments stronger, 42 on v., 55 on xxiv. Paired 

 papillae to some or all of xix.-xxx. No caeca. Sperm-sacs in x.-xiii. 

 Spermathecae 2-20 pairs. 



Hah. Celebes, Sangir, Borneo. 



The question of the identity or the non-identity of the various 

 species here grouped together in deference with the arrangement 

 of Drs. Horst and Michaelsen does not appear to me to be quite 

 settled. 



Horst found that in numerous examples studied by him, 

 the number of papillae ranged in number from a single pair 

 through two, three, four, five, eight, nine, and ten pairs, there 

 being occasionally an asymmetry. This seems to dispose of at 

 any rate one alleged specific difference between the four 

 species described by myself and stelleri of Michaelsen. A renewed 

 study of my own material and the dissection of many more indi- 

 viduals than those which formed the basis of my original description, 

 has led to the following results. 



In 32 individuals from Merabah there were never more than 

 two pairs of papillae upon segments xix., xx. Occasionally an 

 asymmetry showed itself, there being only one of one pair px-esent, 

 and occasionally papillae were totally absent. In all of these same 

 specimens the spermathecae were small in number, not more than 

 two in segment vi. and not more than four pairs in segment vii. 



The sperm-sacs of this series are four pairs in x.-xiii. The last 



42* 



