1900.] EARTHWORMS OF THE GE>TS AMTNTAS. 613 



pore (rarely paired) on xiv. Male pores always separated by some 

 setae, their degree of approximation varying. Genital papilla? 

 commonly, but not always, present; they are developed in the 

 neighbourhood of the male pores or sperrnatheeal pores, or both. 

 There are apparently two kinds, which may coexist : sucker-like 

 depressions and projecting or flattened areas of modified epidermis. 

 Septa viii./is. and ix./x. usually, but not always, missing. Gizzard 

 always in segment viii. No calciferous glands. Intestine com- 

 mences invariably (?) in xv. Intestine nearly always provided 

 with a pair of forward! y-directed caeca of limited (up to five 

 segments) extent. Caeca occasionally divided into not more than 

 6 caeca. Typhlosole small. The last heart either in xiii., or, much 

 more rarely, in xii. Nephridia " micronephridia " only. Sperm- 

 sacs usually in xi., xii., sometimes extending to x. & xiii. Sperm- 

 reservoirs always present,- enveloping sperm-duct funnels in x., 

 xi. Egg-sacs commonly present in xiii. or xiii., xiv. Sperma- 

 thecae one to six pairs in some, or all, of segments iv.-ix. ; occa- 

 sionally numerous (2-14) in one, or two, segments. Spermatbecae 

 always provided with a diverticulum (in which alone the sperm 

 is stored), to which are rarely appended secondary diverticula. 

 Sperm-ducts open in common with a lobate spermiducal gland 

 which varies in size and is rarely absent. The muscular duct of 

 this gland opens directly on to the exterior or through a terminal 

 dilated sac, which may be provided with an exsertile penis. Penial 

 setae are not present. Glands correspond in many cases to the 

 genital papillae. 



Distribution. Oriental Eegion, especially Malay Archipelago, 

 but found also (introduced ?) in Australia, Africa, America, 

 Europe. 



(1) Setce on all segments of clitellum ; gizzard-septa absent ; 

 spermiducal gland-duct with terminal bidbas. 



A. Spermathecae 3 pairs in vii.-ix. 



1. Amyntas houlleti Perrier. 



Pericliceta houlleti, Perrier, Nouv. Arch. Mus. viii. p. 99. 



P. houlleti, Beddard, Ann. Nat. Hist. (5) xvii. p. 93 ; id. P. Z. S. 

 1887, p. 389 ; id. Zool. Anz. 1888, p. 91 ; id. P. Z. S. 1890, p. 61 ; 

 id. Quart. Journ. Micr. Sci. xxx. p. 459. 



P. houlleti, Eosa, Ann. E. Accad. Torino, xxix. p. 16 ; id. Ann. 

 Mus. Civ. Genova, (2) xvi. p. 515. 



P. houlleti, Michaelsen, Abh. Senck. nat. Ges. xxi. p. 234; id. 

 Jahrb. Hamb. wiss. Anst. xvi. p. 12 & p. 92; id. Zool. Jahrb., 

 Abth. f. Syst. xii. p. 139. 



P. houlleti, Bourne, Journ. Asiat. Soc. Bengal, lviii. p. 110. 



P. houlleti, Horst in Weber's Zool. Ergebn. ii. p. 64. 



Megascolex houlleti, Yaillant, Anneles, 1889, p. 75. 



Perichceta campanulata, Eosa, Ann. Mus. Civ. Genova, (2) x. 

 p. 115. 



