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capillary sete, about ‘2 to “3 mm. long, bearing along one 
edge of their distal fourth a narrow lamina, which may be 
slightly dentate distally (fig. 11C). In some sete the 
whole of the lamina seems to be broken up into a series of 
minute pointed processes similar to, but, of course, smaller 
than, those of the adult setze. Some of these setee have a 
narrow but shorter lamina on the opposite side. The 
other notopodial sete are quite different (fig. 11 A, B). 
They are only about ‘18 mm. long. Hach of them ends 
in a long fine point and beyond the middle of its length 
the seta bears a thin but broad lamina or wing on each 
side upon which faint oblique striations are occasionally 
visible. Hach notopodial pencil contains only one seta 
of the latter kind accompanied by one to five of the longer 
papillary sete. The shorter sete with a broad lamina on 
each side soon disappear, they are not recognisable in 
young specimens, 17 mm. long, from the sand. 
The neuropodial crotchets are about ‘04—05 mm. 
long (fig. 15). Hach has a thickening upon the shaft 
lying just below the level of the epidermis. On examin- 
ing the rostral region there are seen to be two or three 
well-marked teeth behind the rostrum, and a small process 
often ending in a fine point under the rostrum. These 
structures are in focus along with the rostrum, and lie 
approximately in the same plane. On careful focussing, 
it may be seen that the teeth are not confined to the 
region behind the rostrum, but that on the sides of the 
latter there are small teeth, so that the rostrum projects 
from the centre of a series of teeth situated around its 
base. The sub-rostral process marks the position of the 
smallest of these teeth. In their natural position the 
crotchets lie so that the tip of the rostrum is directed 
dorso-laterally. In most post-larval specimens about 
5 mm. long each neuropodium bears only two to six 
