REVIEW : ROCKS OF EWCROSS, DUFTON, AND SHAP. 63 
‘Reise in den Sibiriens,’ ii, pl. 1, p. 19; ‘Fam. der Anneliden,’ 
p. 103, etc.), or a closely-allied species. 
Up till the present, Eisen’s Worm (Lumbricus etsent Levinsen)- 
has, so far as I am aware, been found in Britain only by myself, as 
recorded on page 14. I have just found it in considerable numbers 
at Apperley Bridge, Yorks., thus making the first Yorkshire record. 
It is one of the handsomest and most delicate of our British 
Lumbrici. The following particulars are from my own observations, 
as I have not yet been able to consult Levinsen’s description. 
Length, 14 to 2 inches; colour, deep-red, with iridescence, chiefly 
observable dorsally when the worm has been placed in spirit. 
Clitellum occupying segments 24 to 31, reddish-brown or lighter. 
The first dorsal pore behind the fifth segment. ‘The internal structure 
is interesting. The gizzard is placed just in front of the clitellum, 
n 
between. There are only two pairs of vesicule seminales so far as 
I can find, the so-called hearts are in segments 8 to 13. I have as 
yet seen no calciferous glands, but there are three pairs of glands 
in front of the vesiculee which are prominent and need investigation. 
As worms differ in their internal’ appearance at different periods of 
the year these observations must be taken as applicable to mid-winter. 
have found three or four species of earthworm parasites, 
including the old Anguidlula dumbrict among the Entozoa, Monocystis 
lumbrici in the Gregarinide, and two parasitic Infusoria, together with 
an external parasite or messmate belonging to the Vorticellas or. 
Rotifers which I have not been able to ny hitherto. 
CAMBRIAN AND D SILURIAN ROCKS OF 
EWCROSS, DUFTON, AND SHAP. 
The Cambrian Rocks and Silurian Base of Ewcross, sara and Shap 
ells. By Ropert R. BALDERSTON. 25 pp. and map. Lancaster, 1890. 
In this pamphlet (a paper read before the Lancaster Philosophical 
Society) the author begins by pointing out the necessity of being 
Prepared, in the Lower Paleozoic rocks of the area in question, for 
inversions and reversed faults ; the possibility that some breccias and 
ubje 
disappointed. The district is, on any theory, a highipsdistasbed one, 
and is mostly hidden by newer rocks: to take the field against such 
odds we must avail ourselves to the full of the two chief arms of the 
Seological attack—palzontology and petrology. Our author, how- 
ever, utterly ignores fossil evidence, and does not appear to have 
Feb, 1891, 
