|)! ae ye - REPORT—1857, 
The next locality worth mentioning is Wellstream Bay, about two miles 
within the wider part of the Lough, or that distance from the upper end of 
the narrow channel, and five to six miles from the sea, Contrasted with the 
former locality, the number of species is reduced to one-half, viz. 
Lamellibranchiata. Living 10 species } —32 
Dead 22 ,, 
Gasteropoda ...... Living 10 ,, =18 
Dead 8 ,, ioe 
50 species. * 
In the widest part of the Lough, near its centre, and farther from the sea 
than the previous locality, we find a still greater reduction in the number :— 
Lamellibranchiata. Living 21 species | —96. 
Dead 5 ,, 
Gasteropoda, «+... Living 8 ,, il 
Dea eo }=14 
40 species*, 
In the open Irish Channel, outside the Lough, 96 species were dredged, 
in the following proportions :— 
Lamellibranchiata, Living 31 species } 55 
Dead 24 ,, 
Gasteropoda ...... Living ll _,, } tog 
Dead 30 ,, ht 
96 species. 
It may be worthy of notice, that the dead shells found in the outside 
Channel, and those dredged in the Lough, presented an aspect so different, 
that if the two were mixed together, I could easily point out those found in 
the one or the other locality. Those dredged at sea were peculiarly fresh in 
external appearance, and generally retained their original consistence, and 
in many cases their colour ; whereas those found in the Lough bad almost 
universally lost their colour, and in many instances were so decayed that 
they could be easily crushed by the fingers. 
On taking a general view of the Molluscan fauna of Strangford and that 
of the Irish Channel opposite its entrance, we remark the absence of species 
belonging to the Lusitanian and South British typest, and the general oc- 
currence of those of the European type, with a large proportion of those 
called Celtic. Some of those considered as more peculiarly British (British 
type), are also not uncommon, as Trochus Montagui, T. millegranus, Pecten 
tigrinus. Those of the Atlantic type are generally rare, the only species 
found in abundance being Cerithium reticulatum, Mangelia gracilis, and 
Psammobia tellinella; others being rare, as Cerithium adversum, Ciree mi- 
nima, Fissurella reticulata, Natica sordida, Terebratula caput-serpentis, &c. 
Those of the Boreal type are represented by Cyprina Islandica, which is 
not uncommon, and by a few others which are rare, as Cardium suecicum, 
Crania anomala, Leda caudata, Syndosmya intermedia, and Trichotropis 
borealis. 
The general conclusion is, that the Mollusca recorded here belong mainly 
to the European and Celtic types, with a moderate proportion of species be- 
longing to the Atlantic type, and a very few Boreal forms. 
* Species procured by the dredge only are recorded here; littoral species, common 
everywhere, are not included, 
+ Forbes and Hanley’s British Mollusca, vol. i, Introduction, 
