of the Fishery Board for Scotland. 449 



elusion — it might easily escape capture by the dredge or the trawl by 

 burrowing deep into the soft mud which forms the floor of the more cen- 

 tral portion of the estuary of the Forth; but its occurrence in the 

 stomachs of the Long Rough Dab and the Witch Sole indicates that it 

 does not always remain in hiding, but occasionally comes to the surface 

 of the mud in which it burrows, and though it may have escaped being 

 captured by the dredge or the trawl, it apparently does not always escape 

 the fishes that happens to be on the look-out for food, yet we can find no 

 reference to its ever having been observed even in the stomachs of fishes 

 taken within the estuary. Calocaris is considered to be somewhat slug- 

 gish in its habits, because specimens are occasionally found overgrown 

 with a small zoophyte ; but such habits should make its capture by trawl 

 or dredge of more easy accomplishment. Moreover, it is not such a small 

 species as to be easily passed over, and it is sufficiently distinct that any 

 one with a fair knowledge of the Crustacea would be likely to recognise 

 it as different from the more common forms, yet the fact remains that not 

 one of the many students who have investigated the Crustacean fauna of 

 the Firth of Forth appears to have obtained any evidence to lead, them to 

 regard it as even of doubtful occurrence within the limits of the estuary. 



Whether Calocaris be a recent introduction or not, there is apparently 

 no doubt as to its having now a right to be reckoned amongst the 

 Crustacean fauna of the Forth. 



The number of Crustacea recorded in the present paper is scarcely so 

 large as in that published last year, but there are included several species 

 apparently undescribed, and others which are new or rare in the Scottish 

 seas. The following are the more interesting of the species recorded : — 



Xanthocalanus (?) borealis, G. O. Sars. 

 (?) Phcenna zetlandica T. Scott (sp. n.) 

 Scolecitlirix (?) brevicomis, G. O. Sars. 

 Platypsyllus minor, T. Scott (gen. et sp. n.). 

 Nereicola concinna, T. Scott (sp. n.). 

 Sterilielia confusa, T. Scott (sp. n.). 

 Ameira tenuicornis, T. Scott (sp. n.). 

 Ameira propinqua, T. Scott (sp. n.). 

 Pseudomesochra longifurcata, T. Scott (gen. et sp. n.). 

 Leptopontia curvicauda, T. Scott (gen. et sp. n,). 

 Normanella attenuata, A. Scott. 

 Fultonia hirsuta, T. Scott (gen. et sp. n.). 

 Monstrilla longiremis, Giesbrecht. 

 Thaumaleus thompsoni, Giesbrecht. 

 Pseudopsyllus eiongatus, T. Scott (gen. et sp. n.). 

 Acontiophorus ornatus (Brady and Robertson). 

 Cancerilla tubulata, Daly ell. 

 Salenshya tuberosa, Giard and Bonnier. 



It will be observed from the above list that five new genera and ten 

 new species are described in the present paper. There were a few other 

 interesting organisms observed, such as Area pectunculoides and Cadulus 

 subfusiformis (two species of Mollusca), but valves only of the first, and 

 a recently dead specimen of the other, were obtained. 



The following is a detailed description of the more interesting of the 

 species of Crustacea observed in the numerous gatherings examined dur- 

 ing the year : — 



2 E 



