UTRICULUS. 99 
district. I have noticed it more frequently than elsewhere 
at Farland Point, Cumbrae. It occurs also down to 10 or 12 
fathoms between the two Cumbraes and off Silvercraigs, 
Loch Fyne. Mr. Norman records it as abundant in rock 
pools in all parts of the Clyde. 
British distribution.—Everywhere throughout our seas ; 
common at low water and down to a few fathoms. 
Foreign localities—From Norway (Lovén and others), 
throughout western Europe to Mogador and the Canaries 
(M Andrew). It inhabits both sides of the Mediterranean, 
the Adriatic, and Aigean Seas. 
* Utriculus obtusus, Montagu. 
Bulla obtusa, Montagu ; Utriculus discors: and U. plicatus, 
Brown ; Cylichna obtusa, Forbes and Hanley. 
Habitat—On the Tan Spit, Cumbrae; and off Silver- 
craigs, Loch Fyne; I have dredged this species alive in 8 
fathoms, on a bottom of muddy sand and nullipore; not 
common, and always small. 
British distribution—From low water mark to consider- 
able depths on many parts of our coast; gregarious and local. 
Foreign localities—Mr. Jeffreys, in Brit. Con., gives Ice- 
— land (Tovell), Denmark, Holland (Menke), Normandy (Macé), 
Bay of Biscay (D’Orbigny, and others), Adriatic (Brusina); 
and in Ann.and Mag. Nat. Hist. he records it as dredged by 
Nares or Spratt in the Mediterranean. In America it is on 
record (but with doubt as to identity) from Massachusetts— 
as Bulla obstricta (Gould). 
* Utriculus hyalinus, Turton. 
Bulla hyalina, Turton ; Diaphana pellucida, Johnston ; Utri- 
culus pellucidus, Brown ; Amphisphyra pellucida, Lovén ; 
Amphisphyra hyalina, Forbes and Hanley. 
Habitat.—In the Laminarian and upper part of the 
Coralline zone; not uncommon, but seldom full grown. I 
have dredged it off Battery Point, Cumbrae; and on the 
west side of Little Cumbrae; at Ardmaleish, Bute; and at 
Moll Dhu and Silvereraigs, Loch Fyne. At Farland Point, 
Cumbrae, I have taken this shell below stones a little above 
low water, Mr. Norman says that it occurs in rock pools 
throughout the Clyde district. 
British distribution—Local throughout all our seas— 
west, south, and north. On the east coast it extends south 
to the Dogger Bank and Yorkshire coast (Alder and Lechenby). 
