72 
Praeger — The Marine Shells 
Jeffreys says the breadth of his largest specimen, found in Skye hy Edward 
Forbes, is 2i inches, and that 1*7 is the average breadth. 
var, perforans. Inhabits the forsaken burrows of Pholades , and chinks of 
rocks. Common — Thompson {sub Pullastra perforans). 
var. ofolong-a. “ Bundoran, Co. Donegal (J.G-.J.)” Jeffreys. 
Tapes decussatus, Linne. 
There is no certain record of this generally common species having been 
taken alive in our province. Thompson, refeiring to the whole of Ireland, 
says {sub Pullastra decussata ) “ a common species”, and in his “ Eeport on 
the Fauna of Ireland ” (1843), he has a cross opposite its name mthe “-North 
of Ireland” column, but he mentions no northerly locality. Jeffreys simply 
says “shores of Ireland”. Hyndman’s only note is to the effect that it 
occurs in the alluvial deposits, and is not now known to be living in Belfast 
Lough ; neither he nor Dickie found even dead valves in their dredgings. 
Miss Eichardson has found a specimen with the valves united, at Portrush, 
but the shell looks old and worn. I have taken it alive at Carlingford, and it 
is abundant on the coast of Co. Louth, but appears to stop short on the borders 
of Ulster. 
Xiucinopsis undata, Pennant. . „ . 
Dead valves occasionally dredged by Hyndman in 6-90 fathoms m Belfast 
Lough, and off Lame ; and Mr. Swanston has taken it off White Head with the 
valves still united. Thompson gives “Belfast Bay” ( s ub Artemis mtata). 
Miss Richardson has sent me a fresh and complete specimen from Portrush 
sands, evidently but recently dead. Like the preceding species, this would 
appear to he one of those shells which are dying out in the district, as, like 1 , 
while it is very rare in a live state, it is to be found in profusion an 
large size in the post-tertiary clays in our estuaries. 
Tellina crassa, Pennant. 
Hyndman dredged a single living specimen on the Cod Bank, 3 miles nort 
of Isle of Muck, 20 fathoms, gravelly bottom. In a dead state it has occurre 
in various localities, Strangford Lough included, in 10-30 fathoms— Thomp- 
son, Hyndman, and Dickie. Single valves are thrown up by the tide at 
Orlock Point, Co. Down, in some quantity— E.L1.P. 
Tellina BaltHica, Linne. 
Common between tide-marks on every shore. Sub T. sohdula by the writ 
quoted above. 
Tellina tenui*, Pa Costa. 
A common gregarious species, living in sand about low water mark. M 
plaice in Belfast Bay feed very much on T. tenuis ” -Thompson. ea 
valves of both this species aud the preceding dredged on the Turbot Bank, 
25-30 fathoms, by Hyndman. 
Tellina fabula, Gronovius. . , 
“ Not uncommon on extensive sandy beaches, as Magilligan, W.T. 0 
