REV. H. FRIEND ON SOME NORFOLK ANNELIDS. 
403 
possesses. The prostomium is drawn out into a long style or 
proboscis, which often equals ten or a dozen of the body 
segments in length. A few other Maids have similar snouts, 
but no British species can be mistaken for this. The worm 
is about 15-20 mm. in length, and if kept in a glass its 
graceful movements can be easily observed. It is widely 
distributed in Great Britain, Europe, and America. 
The other Maid, found among vegetation in the dykes 
along with Stylaria was Paranais littoralis , O. F. Muller. It 
has no hair-like or capilliform setse, and is destitute of a 
proboscis. What is known as the cephalization extends to the 
end of the third setigerous segment. The head is rounded, 
the setse forked, and the segments number about 50. 
The Tubificidce were represented by two species, but they 
were found only in one place in a dyke running through 
fields behind the Laboratory. One of these was Limnodrilus 
udekemianus , Claparede, a well-known and widely-distributed 
form. The other was either the true Tubijex ( T . tubifex , 
Muller) or a very similar worm which is more common, and 
has up till the present constantly been confused with it. 
Since I was at Sutton my attention has been largely devoted 
to this subject. (See J.R.M.S., June, 1912.) 
The white worms or Enchytrceids of Sutton proved to be 
both numerous and interesting, and much remains to be done 
in this group in Norfolk. I do not know that any single 
species of Encliytrceicl has ever yet been recorded for this 
county, except as the result of my recent researches. I have 
given particulars of some of my results in papers read before 
the Microscopical Society and elsewhere, and yet have certain 
details to work out before my task can be completed. The 
JEnchytrceids fall into two groups. (1) Those with red blood, 
frequently found on the sea shore and in brackish water, and 
including Pachyclrilus or Lumbricillus , alluded to at the 
beginning of this paper, together with Marionina. (2) Those 
with colourless blood, including Henlea, Enchytrceus , Fridericia 
