404 ox THE FAUNA AND ROTTOM-DEPOSITS NEAR THE 30-FM, LINE 



Depth. Shallow water to 400 fathoms (Bourne, No. 11). Milne-Edwards and Bouvier 

 give several records between 50 and 100 fathoms. 



Bottom-deposit. Marion (Mediterranean, No. 74) found small specimens of Atelecyclus 

 on the mud at 100 fathoms. Gourret (Mediterranean, No. 31) records it from mud and 

 under stones. Jlilne-Edwards and Bouvier (Bay of Biscay, No. 80), from muddy sand 

 and from line sand (50-100 fathoms). Walker (Irish Sea, No. 112), from broken shells 

 and small stones (22 fathoms). Metzger (North Sea, No. 78), from sand and shells (50 

 fathoms). Pruvot (Brittany, No. 98), from gravel and (Mediterranean) from mud, from 

 sand (30 fathoms) and from rocks and mud (shore). 



These records are not very conclusive as to the nature of the ground which Atelecyclus 

 usually fret^uenta, but combining them with my own observations there seems to be reason 

 for supposing that it likes nuiddy ground, but that the mud is generally mixed with a 

 coarser deposit. Occasionally it is found on fine sand. 



Ehalia tumefada (Chart XI.) is abundant on the coarse gravel mixed 

 with fine sand, which is found on the west side of the Eddystoue 

 (Grounds IX. and XI.). It is constantly present, though in much 

 fewer numbers, on clean shell gravel grounds (XVI. and XVII.). One 

 specimen was taken on the fine sand, Ground II., haul 23, but this was 



quite exceptional. 



Dlstribution. Geographical. Mediterranean, Portugal, Bay of Biscay, British Coasts, 

 Norway to Arctic circle (Gourret, No. 31 ; Norman, No. 93). 



Depth. 25 fathoms (Metzger) to 98 fathoms (Milne-Edwards and Bouvier). 



Bottom-deposit. Goodsir {fide Bell, No. 9, p. 143) states that this species is generally 

 found on stony bottoms and on fishing-banks. Metzger (No. 78) records it once from the 

 Pomvierauia dredgings in the North Sea on a bottom of sand and shells (25 fathoms). 

 Walker (No. 112) records it on nullipore gi'ound in the Irish Sea, and Pruvot (No. 98) 

 on gravel at Roscoff and on coastal mud and sand in the Mediterranean. Gourret (No. 31) 

 found it on very muddy sand (26-36 fathoms, Mediterranean) ; Bonnier on shell sand and 

 coral bottom ; Milne-Edwards and Bouvier in the Bay of Biscay on muddy sand. 



Ehalia tuberosa. Chart XI. The distribution of E. tuherosa on tlie 

 area under examination is almost exactly the same as that of E. 

 tumefada. Single specimens have, however, been taken in addition on 

 Grounds VIL, XIII., and VI. A. 0. Walker (No. 112, p. 98) has 

 drawn attention to the fact that these two species are almost invariably 

 taken together, and has expressed a doubt as to their specific dis- 

 tinction. The differences between them are certainly very slight. 



Distribution. Geoyr((phical. Mediterranean, Portugal, Bay of Biscay, British Coasts, 

 Norway to Arctic circle (Gourret, No. 31 ; Norman, No. 93). 



Depth. Shallow water (2 fathoms, Gourret) to 90 fathoms (Milne-Edwards and 

 Bouvier). 



Bottom-dcjMsit. A. 0. Walker (Nos. Ill and 112) records the species in the Irish Sea 

 on nullipore ground, on broken shell and small stones, on stones and mud, and on shells, 

 sand, and gravel. Milne-Edwards and Bouvier (No. 80) on muddy sand and on grey sand ; 

 Gourret (No. 31), on muddy gravel, on muddy sand, and on gravel. Bonnier (No. 10), at 

 Concarneau, records it from the same grounds as E. tumcfacta. 



Ehalia Cranchii (Chart XT.) is only recorded on one ground in tlie 

 neighl)ourhood of the Eddystone, viz., Ground XI. (hauls 8 and 9). It 

 has been taken also on the Bolt Head Shell Gravel and on the Prawle 

 Stony Ground, but only in small numbers. 



