38 
Praeger — Fossils at Alexandra Dock , Belfast 
Helix nemoralis, Mull. 
Two specimens of this land shell occurred in the top clays. 
Patella vulgata, Linn. 
Yellow sand, very rare, and much worn. (One specimen, 
* Helcion pellucidum, Linn. 
Several young specimens in the upper clay. 
Grainger). 
Fissurella Grseca, Linn. 
Very rare ; a single specimen in the yellow sand. 
* Capulus Hungaricus, Linn. 
Upper clay, one specimen. 
Troclius magus, Linn. 
In the yellow sand and upper clay, very rare. 
Troclius cinerareus, Linn. 
Very frequent, except in the lower clay, where it did not occur. 
f Trochus umbilicatus, Mont. 
Upper clay, rare, and of small size. 
Xiacuna divaricata, Fabr. 
Very frequent, especially in the upper clay. 
Xiittorina obtusata, Linn. 
Frequent throughout. 
Xiittorina obtusata, var. aestuarii, Jeff. 
Two examples in the upper clay. 
Xiittorina rudis, Maton. 
Frequent in the upper and lower clays. (Scarce, Stewart). 
Xiittorina rudis, var. tenebrosa, Mont. 
Upper clay, one specimen. 
Xiittorina litorea, Linn. 
Common throughout the deposits. 
Rissoa inconspicua, Aid. 
Common, and generally distributed. Now quite extinct in our lough. 
Rissoa membranacea, Adams. 
With the last species. 
Rissoa violacea, Desm. 
Very frequent in the upper and lower clay, 
f Rissoa striata, Adams. 
In the upper clay, not uncommon. 
Rissoa vitrea, Mont. 
With the last, but rare. 
Hydrobia ulvae, Penn. 
Occurs throughout the deposits ; in abundance in the most recently formed 
bed. 
