205 
by Mr. Jeffreys {Brit. Conch , vol. ii. p. 132 .) — Area tetra- 
gona shows a remarkable nucleus, which differs from almost 
all others I have seen in being amber-coloured or light brown, 
and it has, scattered over its surface, a few marks which 
appear like short deeply-implanted hairs. Two species of 
Cardium have been distinguished, namely C. edule and 
C. echinatum ; both have the foetal shell smooth, transparent, 
and globular, but that of C. echinatum is considerably the 
larger. Several species of Venus have been observed, and in 
all of them the foetal shell is small, globular, and glassy. The 
fry of Tapes is characteristic, and the form of it which I have 
found appears to agree with T. virginea. 1 must pass over 
many other shells about which there is more or less doubt, 
and will at present mention only one more, namely Saxicava 
rugosa , which is the most abundant of all the species in the 
Dogs Bay sand. The nucleus is very large, glassy, and 
transparent, and resembles a Cyclas in shape. The fry of 
this species shows very well how completely the characters of 
the adult shell are dormant in the foetal state, and how im- 
mediately they are sometimes assumed with the first growth 
beyond that condition. 
In conclusion I have only to say that I trust the results of 
further examinations of this very rich shore deposit will justify 
me in having introduced it to your notice, although at present 
my observations are so slight and imperfect ; and I will further 
venture to express the hope that the large collection of speci- 
mens before you may tempt other members of the Section to 
visit the coast of Galway and make additions to the subjoined 
lists. 
LIST OF SPECIES FROM ROUNDSTONE. 
1864. 
Foraminifera. 
Orbulina universa. Globigerina bulloides. 
Lagena vulgaris var. clavata. Planorbulina vulgaris. 
,, var. perlucida. Truncatulina lobata. 
