NEW ENGLISH GENUS OF AQUATIC OLIGOOH^TA. 175 



Microchseta is confined to the south of Africa. Kynotus, 

 TykouuSj and Callidrilus, Michaelsen^i are also African. 

 Bilimba, Rosa/ is from Burmah; and Glyphidrilus, 

 Horst,3 comes from Malay. The habitat of Brachydrilus 

 is unfortunately unknown. 



The Thames is visited by all sorts of traffic, and it is possible 

 that cocoons may have been brought over with timber; or 

 amongst the roots of some water plants, such as Anacharis 

 alsiuastrum, from North America, and like it have increased 

 and multiplied in our rivers. 



Beddard has recently {' Annals and Mag. of Nat. Hist.,' 

 ser. 6, vol. ix, 1892) suggested that Anteus and E,hino- 

 drilus are one and the same genus (p. 118), and states that 

 the only points in which the two genera differ are — 



(1) The presence of a greater number of calciferous glands; 



and 



(2) The presence of an elongated prostomium in Bhino- 



drilus. 

 He rightly suggests that these characters are without generic 

 importance, but he overlooks the absence of spermathecae* in 

 Anteus; and it seems to me that till we know from the 

 examination of sections whether sperm-ducts exist (which 

 they probably do, and perhaps, as in Sparganophilus, they 

 are in the body-wall), and where they open externally, we shall 

 scarcely be justified in uniting the two genera. The character of 

 the nephridial loop in Anteus is very diff'erent from that of 

 Rhinodrilus. Michaelsen (' Arch. f. Naturgesch.,' 1892) has 



' Kynotus, Micliaelsen, ' Jalirb. d. Hamburg, wiss. Atistalfc.,' ix, 1891; 

 and 'Arch. f. Naturgesch.,' 1891; Rosa, 'Boll. Mus. Zool. Torino,' vii, 

 1892. Ty kon us, 'Arch. f.Naturg.,' 1892. 



^ 'Anna!. Mus. Cir. d. Stor. Nat.,' Geneva, 1890. 



=• ' Zool. Anzeig.,' 1891. 



•* Oneor two species of Allolobophora are stated to be deprived of their 

 spcrmathecse ; I am not aware at what period of life these species were 

 examined. Allurus tetraedrus is usually stated to be deprived of them. 

 I can confirm Vejdovsky in stating their existence. I have found three pnirs 

 opening dorsally of the lateral setge. 



