Friend: Annelid Bionomics, 397 
the new worm. The internal characters, therefore, remain 
for the present unknown. 
A. similis Friend is 7 cm. in length when well preserved 
in alcohol. The first ten or dozen segments are without annuli, 
and the segments 5 to 8 are the widest and largest. The total 
‘number of segments is 180. The body is cylindrical, but the 
tail is somewhat flattened. When alive the animal resembles 
caliginosa in colour and shape, and in alcohol it is practically 
colourless. It is much more active than the green worm, and 
does not emit the yellow fluid for which the well-known ally 
Fig. 1—A porrectodea similis Friend. Natural 
size. 
2—Girdle segments 28-35, shewing tuber- 
cula pubertatis on 30% 32 : 34. 
ys 
3—Head of A. similis (A) and A. chloro- 
tica (B). 
y” 
is famous. The male pores cannot be seen, nor have I yet 
been able to decide where the first dorsal pore is situated. The 
setee are paired as in the green worm. The girdle extends from 
the 28th to the 35th segment, and the tubercula pubertatis are 
situated on 30, 32, 34, 2.e., on alternate segments. There are 
no papille on the more forward segments such as occur in the 
green worm and the mucous worm. The head barely cuts 
into the first segment (peristomium), but has a well marked 
groove running transversely. The diagram shews the difference 
between the two species in this respect. 
But when we come to a side-by-side comparison we soon see 
how great the difference between the two species is. 
1gtt Nov. I. 
