176 Proceedings of the Royal Physical Society. 
apex backwards are 4-5 hairs, placed 3 near the apex and one at least farther 
back. Endomera considerably less than half the length of the paramera. 
The penis is bent and is closely united with the telomera and hypomeron. 
As in merguli it is conspicuous. 
Ne) 
Length of the apparatus, ‘44 mm. 
KEY TO SPECIES OF DocopHoRI FROM BRITISH AUKS, BASED ON 
CHARACTERS OF MALE GENITALIA ALONE. 
. Paramera evenly bent from base to apex, i.c., neither outer nor inner edge 
abruptly turned at any point . t Ae eae hs (3). 
Paramera suddenly bent and narrowed towards apex : : (2). 
. Telomera linear: inner pattern of mesosome constricted. (D. calvus). 
Telomera distally expanded: inner pattern of mesosome 
unconstricted . : : : : . (D. celedoxus). 
Telomera free, stalked and capitate, longer than the projecting portion of 
the penis. Hypomeron distinct : : . (D. acutupectus). 
Telomera shorter than the projecting portion of the penis, with which and 
the hypomeron they are apparently fused : : b (4). 
. Paramera long and narrow: ventral hair before half, sides of mesosome 
parallel or subparallel : (D. mergult). 
Paramera narrower on apical third, ventral hair beyond half, sides of 
mesosome slanting inwards : : : (D. megacephalus), 
(Issued separately, 20th April 1915.) 
