370 FRANK E. BEDDARD. 



to be embedded in the substance of other cells (n, fig. 11); 

 these latter stain very slightly with borax-carmine, and the 

 protoplasm is arranged in a reticulate fashion. The nucleus of 

 the cell is small but conspicuous in that it is deeply stained ; 

 it is perfectly plain, as also shown in a longitudinal section 

 (fig. 12) that the drain-pipe cells actually perforate these cells. 



I cannot, however, be perfectly certain as to the correctness 

 of the above description ; it may be that the larger cells are 

 simply specialised into a denser area surrounding the lumen, 

 and a less darkly staining region situated peripherally. There 

 is, however, a very sharply-marked boundary line between the 

 two regions. 



If the supposition that these two regions are really distinct 

 cells, be correct, there is an obvious resemblance to Clepsine. 1 



Summary of structural differences from Lumbricus 

 and Allolobophora. 



(1) Position of male reproductive folds upon Segment 13 

 and therefore in front of female generative orifice (fig. 2). 



(2) Presence of a single (?) pair of spermathecse opening 

 on to the middle of their segment a little to one side of 

 seta (fig. 4). 



(3) Calciferous glands of consecutive segments not distinct 

 from each other, occupying Segments 10 — 14. 



(4) Gizzard confined to a single segment (No. 17). 



(5) Structure of nephridia (figs. 11 and 12). 



(6) The presence of a continuous glandular fold on either 

 side of the body of the same structure as the clitellum, ex- 

 tending from the 4th to the 24th segment, and interrupting 

 the muscular layers (figs. 2 and 8). 



(7) The special development of this glandular mass in 

 Segment 13, round the orifice of the vas deferens (fig. 5). 



1 A. G. Bourne, this Journal, 18S5, p. 482. 



