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imbedded in, the integument in the neighbourhood of the generative 

 pores. Those of Criodrilus are substantially similar, though rather 

 more elongated in form. I have lately succeeded in finding these struc- 

 tures in the African genus Alma, a near ally of Criodrilus, and have 

 communicated the fact to the Zoological Society of London in a me- 

 moir -which will be published shortly. In Alma — the species which I 

 have examined appears to be Michaelsen's A. Stuhlmanni — the 

 spermatophores are scattered about upon the anterior segments and are 

 again substantially of the Lumbricid pattern. They are however flat- 

 tened and somewhat disc-like receptacles; they do not stand out so 

 prominently as in Lumbricids, a fact which led Morren to describe 

 these organs as penes. The only other earthworms in which these 

 structures have been found is in the genus Polytoreutus. In that genus 

 I called attention to their existence in P. magilensis (»On Two New 

 Genera and some New Species of Earthworms«, Quart. Journ. Micr. 

 Sc. XXXIV. p. 250), and later in P. violaceus (»A Contribution to our 

 Knowledge of the Oligochaeta of Tropical Eastern Africa«, Quart. 

 Journ. Micr. Sc. XXXVI. p. 234). I erroneously stated in describing 

 the spermatophores of the last mentioned species that they entirely 

 resembled those of P. magilensis. A recent examination of a new 

 species of Polytoreutus allied to P. violaceus has caused me to re-exa- 

 mine the spermatophores of P. violaceus, which I find to be exactly like 

 those of the new species of Polytoreutus, but quite unlike those of P. 

 magileiisis. In the latter species they are extremely long and very 

 slender, only widening out at the anterior end in a spoon-like fashion. 

 The opposite extremity fines off into an exceedingly slender tip. 

 Throughout its whole extent the spermatophore is densely covered with 

 projecting spermatozoa. In the other two species oî Polytoreutus the 

 spermatophores have a remarkable likeness to those of the 

 Tubificidae; I should say rather to those of Tubifex and Psammo- 

 ryctes, for Botlirioneuron — as Stole (''Monografie Ceskych Tubificidû", 

 Abh. Böhm. Ges. VII. 1888) has ascertained — has stalked spermato- 

 phores attached to the neighbourhood of the male pores, a state of 

 affairs which I have myself been able to verify in a new species of the 

 same genus from the Malay peninsula. It has been pointed out by 

 several observers (Claparède, Lankester etc.) that the spermato- 

 phores of the Tubificidae (excluding of course Botlirioneuron] are mo- 

 bile, the lashing of the free ends of the spermatozoa producing a move- 

 ment of translation in a series of curves. I am of opinion that the 

 spermatophores of Polytoreutus violaceus and its ally are also able to 

 move about in the spacious spermathecal sac possessed by this genus; 

 the reason which leads me to infer this is the coiling in the preserved 



