George: Troinbidium buccinator. 381 
edge notched or crenated, and the exterior surface, rather 
thinly beset with fine hairs. (See Mr. Soar’s figure of two of 
these organs highly magnified). 
Hermann, whose work was published after his death in 
1804, paid much attention to, and figured the hairs or papillee 
of many of the mites he described. His work is unfortunately 
scarce, but may be seen in the great libraries, such as that of 
the British Museum, Cambridge University, etc., and is still 
well worth consulting. 
Of course, our knowledge of these creatures has increased 
amazingly since his time, and his classification is entirely 
superseded, and is yet far from complete. Moreover, he had 
not the advantage of high microscopic power, now so common. 
It is rather strange, that, so far as I know, no specialist has 
recently published an illustrated monograph on these very 
handsome creatures. 
===5 (0) 5 
GEOLOGY. 
Coast Erosion at Aldborough, East Yorkshire.—-The 
following measurements show the loss of land at Aldborough, 
East Yorkshire, from August, 1893, to August, 1911. The 
distances of three fixed points from the edge of the cliff were 
measured in 1893, and a fourth was added in 1gor. A is the 
south gate post in Old Dales, the lowest point on the cliff 
along the Aldborough frontage ; the distances were measured 
nearly due east along the old road. JB is the south gate post 
in the western hedge of the field immediately north of ‘ Old 
Dales’; the cliff rises sharply from A to B. C is the south- 
east corner of the permanent buildings of the public-house. 
D is the south-east corner of ‘ Red House.’ The distances 
from B, C, D were measured due east :— 
August, 1893. | January, Igor. | August, IgII. 
A. 63 yds. 50 yds. 1 ft. 344 yds. 
B: 48 yds. 2 ft. 39 yds. x ft. S75 Siok ite 
C. 52 yds. 1 ft. 41 yds. 30 yds. 
D. ci ee go yds. 70 yds. 
The edge of the cliff at D is about the highest point on the 
coast at Aldborough. The distance from A to D is less than a 
mile.—T. PETCH. 
1911 Nov. I. 
