of the North of Ireland. 
77 
in our present waters, occurs throughout our later post-tertiary deposits, while 
S. siliqua, which is not found in. these beds, appears to have now taken its 
place, being abundant in suitable localities. 
Pandora insequivalvis, Linne. 
var. ohtusa. “Dredged off Carrickfergus, Mr. Hyndman; subsequently by 
Mr. Hyndman and myself in Strangford Lough” — Thompson. Taken aliye 
off Black Head and Donaghadee, in 15 to 20 fathoms, by Hyndman; and off 
the entrance of Strangford Lough, in 18-20 fathoms, by Dickie. (All sub P. 
obtusa). Dead on the Turbot Bank and elsewhere. 
lyonsia ITorveglca, Chemnitz. 
This curious shell is rare in the district. “ Dredged in Belfast and 
Strangford Loughs, in from 6 to 12 fathoms, among seaweed” — Thompson. 
Living in from 8 to 12 fathoms in Belfast Lough, and dead on the Turbot 
Bank — Hyndman. Dickie took it alive in 15 to 25 fathoms in Strangford 
Lough, and dead in shallower water. Off Crawf ordsburn, 6 to 7 fathoms, dead, 
but fresh and valves united — Mr. S. A. Stewart. 
Thracia prsetemiis, Pulteney. 
Thompson says of it ( sub Anatina prcetenuis) — “ ‘Belfast Lough, rare,’ 
Brown. The latter locality probably a mistake. Magilligan is the only 
northern locality in which the species has yet been met with by Mr. Hyndman 
or myself ; it is thrown ashore quite fresh there ”. Dredged by Hyndman in 
15, 20 (valves united), and 27 fathoms off Belfast Lough, and in 20 fathoms 
off Larne, dead in each instance. “Coast of Down (Patterson)” — Forbes 
and Hanley. (All sub Cochlodesma prcetenue) . I have a valve found by my 
brother at Magilligan. 
Thracia papyracea, Poli. 
‘"Belfast and Strangford ” — Thompson (sub T. declivis, Thor.). Dredged by 
Hyndman at various points around the entrance to Belfast Lough, in 20 to 30 
fathoms, and by Dickie both in and outside of Strangford Lough, in 7-20 
fathoms; in all instances dead ( sub T. phaseolina). Dead, in 6-8 fathoms, 
off Bangor and Donaghadee — Mr. S. A. Stewart. 
var. villosiuseula. Dead, in from 1 to 30 fathoms, off Belfast Lough and 
Island Magee — Hyndman (sub T. villosiuscula). 
Thracia pubescens, Pulteney. 
“ Belfast Bay ” — Thompson. On the Turbot Bank, rare, dead— Hyndman. 
“ The reputed Irish localities are doubtful”— Jeffreys. 
Thracia eomrexa, W. Wood. 
“Difficult to procure on account of its habit of burrowing rather deeply in 
muddy sand” — Jeffreys, which may perhaps account for its not having been 
taken alive in the province. “In Strangford Lough” — Thompson; speci- 
mens from thence are in Thompson’s collection in the Belfast Museum. “Hot 
known to be now living in the Bay ; two specimens have been dredged off 
