705 

 1892.1 SPECIES OF EARTHWORMS. '" 



genus is so far degenerated that it possesses no gizzard not even the 

 faintest vestige of one; the nephndia, ^.hlch ^" ^^^^^ ^^^° ^^^^ 

 lecid«3 have a large terminal end sac, very often with a capac ou 

 caecum attached, are totally without anything of ^^^^^^^^f/ ^^^f^^ 

 indication of a low position among the ^^''"^f,^^ 9 f ^^^^^^^ 

 nerhans the opening of the sperm-ducts upon the xviith segment , 

 we find that thl segment is the one which bears the pores in question 

 Tn the genus OcnerodriUs and also in MicrodriUs and Ihcro.coUx. 

 Sis aScidence, though probably - more that there is bu on 

 T3air of calciferous glands and that these are in the mnth segment , in 

 fhee low forms of'terrestrial Oligoch^ta we meet with exactly the 

 same condition of the calciferous glands, viz., m Ocnerodnlus , Gor- 

 dZriluT^nd in the Acanthodrilid Kerria.^ As, however, here are 

 Geolcokcds (such as Microch^ta) in which the calciferous glands are 

 SarW educed to one pair, but which are evidently not degenerate 

 tbrms, too much stress cannot be prudently laid upon the point of 

 .similaritv to the three genera aforementioned. ,, ^ -i 



Wand r have independently pointed out that the family 

 Geoscolecida can be most cinveniently divided into two subfamilies 

 confined re^ectively (with the exception only oi Pantos colea^, which 

 s clmo^^^^^^^ toMie Old and to the New World ; I need no 

 aglTo into the matter here, as the reasons which led me to thi 

 ScluLn have been fully giye^n in the P^P-^^f ^,^f ;;,^ J.^J 

 nresent genus interferes with the symmetry of this proposed 

 present genus belongs in structure to the New World 



^rcSTtt'famU^^^^^^^^^ the Old World. The spermato- 



Sriie in froTt of the testes and the other reproductive organs, 



-^£'^Z^:;!^S^'^o other genus in every point: 

 the form and position of the sperm-sacs are unique in the famdy 

 the vTtial position of the nephridiopores is characteristic of the 

 lenus^ cL^, with which, however, Ilyogeniah,, no other marked 

 foints of resemblance. It comes nearest, perhaps, to Antev^ and 

 Ell" Tut differs from both of these g-era -^^^ o 



.VV.0II rliffprpnoes which are, in my opinion, collectively at least, or 

 Si*r;o?t'ance to justify its Lt!nc.io„ b, a separate geneno 

 name. 



YII. EXPLANATION OF PLATES XLV. & XLVI. 



T7- 1 Pnrf of an effe-sac of MoniUaaster hahamensis, showing ripe ova. 

 Fig. 1. Part ot an egg "-^^^l .j. ^ hahmnensis: a, transverse section. 



2. Spermatotheca ot iuomugiut>^ _ segments are numbered. 



3. Ventral view of anterior Begments of same the ^e| .^ ^^^^^^,^,^^^^ 



4. Male genital apparatus ot ttie same woim , t s 



from a series of sections. 



I |1I.'S*»I n. sp. " Oontritato .llamorfologia dei (Jeoscolecid,,» 

 Boll. Mus. Zool. Tol. vn, no. 119. 

 5 Q. J. M. S. vol. xxsiv. p. i58. 



