CAECUM. 69 
feet of water on the north side of the rock on which the 
Castle of Little Cumbrae stands; I have not been so for- 
tunate, never having seen the species alive. Mr. Norman 
records it as rare in Lamlash Bay. 
This tiny shell fully merits the admiration lavished upon 
it by Mr. Jeffreys. It is, indeed, one of our daintiest samples 
of Nature’s handiwork. 
British distribution—¥From the numerous stations on 
record, it seems to be spread over all our coasts from Lerwick 
to the Channel Islands. 
Foreign localities—In Brit. Con. the following are given: 
—Bohuslin (Malm), Gulf of Lyons (Martin) Spezzia 
(Jeffreys), Sardinia and the Mediterranean shores of Africa 
(Costa), Madeira (Watson). Dr. Wallich dredged it in the 
North Atlantic in 1,622 fathoms water. 
FamiILty VERMETIDA, D’Orbigny. 
Cacum, Fleming. 
Cecum trachea, Montagu. 
Dentalium trachea, Montagu ; Dentalium imperforatum, 
Adams; Brochus trachiformis, and B. striatus, Brown. 
Habitat—-Kames and Fintry Bays, Cumbrae; off Ascog, 
Bute ; Lamlash Bay, Arran ; and off Silvercraigs, Lochfyne ; 
in 10 or 15 fathoms in sand and nullipore, mixed with mud; 
scarce, and generally dead. (I have never taken it alive.) 
British distribution.—South and west of England and 
Ireland, and extending as far north as the Clyde. On the 
east coast Mr. Alder reports a single specimen from ‘l'yne- 
mouth. 
Foreign localities.—Brittany (Cailliaud), Northern Spain 
and Canaries (M‘Andrew), Madeira (Watson), throughout 
the Mediterranean Sea (Navres and others). 
Ceecum glabrum, Montagu. 
Dentalium glabrum, Montagu ; Brochus glabrus and B. 
leevis, Brown. 
Habitat—Not uncommon alive in 4 to 15 fathoms in 
sand and nullipore, in company with the foregoing species, 
but much commoner and extending to shallower water. 
Mr. Norman has taken it alive in rock pools on the 
Allans Rocks, Millport Bay; and at Clachland Point, Arran. 
British distribution.—Throughout all our coasts rather 
common. 
