Gatty Marine Laboratory, St. Andrews. 25 
Hongue, gives a detailed description of its structure. The 
body measures 250 mm., and is divided into an anterior and 
a posterior region, the latter commencing at the twelfth 
bristled segment. The hook-rows are short dorsally, long 
ventrally in the posterior region. There are two pairs of 
cephalic ganglia, and the great nerve-cords have neural 
canals. The alimentary canal has a papillose proboscis, 
cesophagus, oval stomach, and a gut which terminates on 
the last segment, the anus having a short ventral lobe. The 
segmental organs occur in every segment, and probably open 
between the dorsal and ventral feet, though he found another 
pore on each side behind it. He did not notice the sexual 
apertures with the hooks, his example being a female. 
Externally was a parasitic Loxosoma. 
Heteromastus filiformis, Claparéde, again occurred in sand 
west of Salthouse Lake, Plymouth (Ad/en). The cephalic 
region agrees with that of the type (Claparéde), and so with 
the proboscis, which has clavate papilla. The body reaches 
the length of 6 cm., and there are over one hundred segments. 
The digestive and the perivisceral systems agree with 
Capitella. The anterior segments are short and broad, the 
posterior long and narrow. The anterior bristles are winged, 
the posterior with the characteristic hooks dorsally and 
ventrally. 
All that is known of the coloration of Cesicirrus neglectus, 
Arwidsson (of the family Maldanide), a species by no 
means uncommon, is the remark by Cunningham and 
Ramage * in their “ Polychet Fauna of the Firth of Forth,” 
that in their “ Awiothea catenata the colour is pinkish, pale 
towards the anterior end, with broad bands surrounding the 
body at intervals.” The region whence these authors drew 
their supply has since altered its character, probably from 
pollution, so that a careful search was unsuccessful. It 
lives gregariously in tubes of sand-particles sunk in the 
sand. In examples from Wales + the anterior end of the 
Annelid is somewhat pale, though the median vessel causes 
a streak along the dorsum, the blood at the same time 
tinting the cephalic plate. In front of the third bristle-tuft 
the region has a smooth and glistening cuticular coat, which 
is iridescent, and at the segment-junction in front of the 
* Trans. Roy. Soc. Edin. vol. xxxili. p. 679 ete. (1888). 
+ Lam indebted to Mr. Arnold Watson for living examples. 
