from the North Sea and adjacent parts. 245 



the caudal region tlie feet become lateral in position, but never 

 ventro-lateral. The branchiae commence at the fiftli pair ol: 

 ieQ\, and appear as little conical processes which increase in 

 size from before backward. They are nearer the mid-dorsal 

 line than the dorsal cirri, but between the twentieth and 

 thirtieth segments they leave this region and approach the 

 cirri. This, however, I find to be variable. Along with the 

 increase in size of the branchise there is a corresponding in- 

 crease in the size of the dorsal cirri, and this increase is espe- 

 cially marked at the base of tlie organs. Each branchia has 

 two vessels which are linked together by a numerous series 

 of connecting-trunks. The bristles, spines, and papillre of 

 the feet all conform with the Monograph *. The segmental 

 organs are limited, but appear more prominently in posterior 

 two-thirds of the body. All the examples are immature. 

 However, quoting from the Monograph f, " Lo Bianco found 

 Aricia foetida, Clap., ripe from January to June at Naples. 

 The eggs are of a greenish colour and deposited in a cylin- 

 drical vermiform mass of mucus.'^ 



The contents of the gut were composed of fine mud 

 particles, debris, and vegetable matter. 



Family Opheliidae. 



Genus Ammoteypane. 



Ammotri/pane aulogaster, H. Rathke. 



Twenty-two specimens of this form, which has a general 

 distribution, are present in the collection, but, like many 

 others, they have suffered from the laboratory fire mentioned 

 in previous reports. The tube containing the animals has no 

 label, and consequently no depth nor locality can be given. 

 The animals themselves are badly scorched and very much 

 shrivelled. This species is found off the shores of the Britisli 

 Isles, but extends much farther north. Izuka makes no 

 reference to either the family or the species, but in the 

 * Challenger ' Report there is a ioxm, Ammotry pane gracile, 

 dredged off Japan, which closely resembles the European 

 species. 



Tiie head is pointed, fairly large, but devoid of tentacles, 

 tentacular cirri, and eyes. The mouth is ventral in position 

 and appears as a fairly large longitudinal slit, which continues 

 as a ventral groove to the posterior end of the animal. 



The body is linear, the longest specimen measuring about 



* Vide ' Monograph,' vol. ii. part ii. p. 500. 

 t Ibid. p. 501. 



Ann. (fc Mag. N. Hist. 8er. 8. Vol xv. 17 



