Gatty Marine Laboratory, St. Andrews. 161 
the winged bristles, the tips of which have now become very 
attenuate. The winged hooks have still somewhat tapered 
and slightly bent tips. There are five brown spines. 
There are some minor differences in the number of spines 
in the feet of the Canadian examples, but it has been thought 
unnecessary to repeat what has been given under those from 
the ‘ Porcupine.’ 
The 30th foot has three spines and six lobes, the upper 
being the larger. The cuticle on these seems to be specially 
thick. The dorsal bristles (Pl. XII. fig. 28) have a compa- 
ratively short winged region at the end of the shaft and a 
slender attenuate tip—which is almost as long as the shaft— 
beyond it. The inferior winged and tapering bristles are 
little altered. 
At the 50th foot there are three brown spines supporting 
the setigerous region and a single short papilla representing 
the dorsal lobe. ‘The tips of the dorsal bristles are still very 
attenuate and the winged region short. The hooks project 
far, have a broad and short winged tip, the widest part being 
just below the neck of the hook (Pl. XII. fig. 27), which is 
short. The main fang is little larger than the five or six 
points above it. 
The species secretes abundant mucus, which mixes with 
the brownish mud amongst which it dwells. The secretion 
may readily line the tunnel in the mud. 
Ehlers observes that all the examples of the genus procured 
by Kinberg and himself came from American waters. 
Besides the Canadian specimens the ‘ Porcupine’ obtained 
others. 
It is probable that the forms described by Ehlers and that 
by Verrill may have closer connexion than the former 
supposes. Verrill observes that the first two setigerous 
segments have branchiz, whereas in the present the lobe 
appears on the second foot. His specimens came from Vine- 
yard Sound and Buzzard’s Bay, on muddy ground. 
Drilonereis canadensis, sp. n. 
Dredged off Port Hood, Gulf of St. Lawrence, 1873. A 
fragment of apparently the same form occurs in a bottle with 
Nematonereis in the British Museum, having been dredged. 
in 40 fathoms off the coast of Cornwall by Laughrin 
(G7 7ls 7429): 
Head (Pl. XIII. fig. 44) when viewed from the dorsum 
forms a,blunt cone, but laterally it is flat. Posteriorly the 
line of the head is convex, for it passes into a shallow crescent 
Ann. & Mag. N. Hist. Ser. 7. Vol. xii. 1 
