NEW BRITISH OLIGOCHATS. 223 
now endeavouring as far as possible to go back to the original 
records and compare the same with living material. Recently 
I have found annelids at Hastings in Sussex, Gilsland in Cum- 
berland, and elsewhere, which can for the present best be 
referred to H. hyalinus. In some respects Hisen’s account 
might be taken to apply to E. albidus, Henle, and EL. pellucidus, 
Friend. But there is every reason to think these are all dis- 
tinct. H. pellucidus, Friend, is the form found in rich soil and 
fat manure. It is quite distinct from HL. albidus, Henle, if the 
worm which I found at Hastings belongs to that species. I have 
found #. hyalinus, Kisen, in the same locality, and the two are 
distinct. The specimens taken at Gilsland, however, differ from 
the sea-coast forms, and I have determined to distinguish the 
latter by calling it H. hyalinus var. densus, Friend. It may be 
described as follows :— 
A white worm, 12-15 mm. in length, with about 45 seg- 
ments. It is opaque, even dense. ‘The salivary glands are 
somewhat large and unbranched, like those of H. pellucidus, 
Fr. ‘There are four pairs of nephridia in front of the girdle. 
The body is full of oil-cells. Chloragogen cells begin in seg- 
ment 5. The brain is oval, about one and a half times longer 
than broad. The sete, which are of about equal lengths, 
number 3-4 in front, and nearly always 3 (rarely 2 or 4) behind. 
The spermathece have an ampulla which is the same length as 
the duct, but about one and a half times as wide, attached to the 
cesophagus. The funnel of the sperm-duct is about two to three 
times longer than broad. 
The worm, as is usually the case in this family, is subject to 
much yariation. One specimen examined was 16-20 mm. in 
length, and had 50 segments, which were annulated. There 
were large pores on segment 12, and the creature flung itself 
violently about when irritated. In another I saw the dorsal 
vessel arise in +4, and in this case the brain was slightly 
notched or concave behind. The postseptal portion of the 
nephridia in the hind segments had no distinct duct. 
6. PacHypriLus Lingatus, O. F. M.—This worm, as already 
stated, is distinct from Senuris (Tubifex) lineata, Grube. I 
have had the good fortune to find it in England, and have been 
able to compare and contrast the two. Michaelsen (‘ Das 
