ANNALS OF SCOTTISH NATURAL HISTORY 226 
The second, third, and fourth pairs are somewhat similar to 
those of that species (Fig. 8). In the fifth pair the inner 
portion of the basal joints is only slightly produced; the 
posterior free margin, which is irregularly angular, bears four 
setee—the two exterior sete are close together, but the other 
two, which are moderately stout, are somewhat distant from 
each other as well as from the two exterior setz ; the second- 
ary branches are subquadrangular, they are longer than broad, 
and are each furnished with five sete ranged around the 
distal end—the middle seta is much shorter than the others 
(Fig. 9). Caudal stylets short, about equal in length to the 
last abdominal segment, and each furnished at the apex with 
a long slender ‘seta interiorly and two small sete at the outer 
angle, while intermediate between these is a broad spine-like 
appendage. This appendage, seen from the dorsal aspect, has 
its two margins apparently nearly parallel for rather more © 
than half its length ; they then taper towards the end, where 
the appendage terminates in a slender hair. This tapering 
portion is plumose on both sides, but the feathering shows 
most prominent on the inner edge. The middle portion of 
each long seta also appears to be plumose (Fig. 10). Ovisacs 
two, moderately large. 
Hlabitat.—Ayr Bay, Firth of Clyde, not very rare. 
Remarks.—Perhaps the most obvious character of this 
small but distinct and interesting species, and one which 
feguires mo dissection to render evident, is that of the 
curious broad spine-like appendages of the caudal stylets. 
The peculiar character of these appendages distinguish this 
species at a glance from any other member of the genus. 
Whe species is named in compliment to Herr Dr. W. 
Giesbrecht, of the Naples Zoological Station. 
DELAVALIA AMULA, J. Scott. 
This species was described in the “Eleventh Annual 
Report of the Fishery Board for Scotland” (part ili. p. 204, 
Plate IV., Figs. 36-47, 1893), from specimens obtained in 
Largo Bay, Firth of Forth, and till this year this was the 
only station for the species known to us; we are now, 
however, able to record its occurrence in the Clyde estuary, 
