PROCEEDINGS OF SOCIETIES. 75 
typiea and L. gracilis. Lagena striata and interrupta are abun- 
dant ; and these, with very few exceptions, have the cost passing 
forward to the extremity of the neck, in which case it is only one 
half of the whole number which do so, each alternate one stopping 
short at the base. Specimens where the coste wind spirally 
around the neck are equally common: with those in which they 
take a straight course. These Lagene have the appearance of old 
coarse shells, but they do not seem to have suffered from attrition ; 
they are scarcely ever found with the neck broken short, though 
it may perhaps be almost equally rare to meet with one absolutely 
perfect. The varieties clavata, perlucida, semistriata, and sub- 
striata, are comparatively rare, and all of them have forms and 
characters very distinct from striata and interrupta, while the two 
latter agree perfectly excepting in the matter of the coste, which 
are found in different specimens to be interrupted in a great 
variety of ways, those with the costs perfectly continuous being 
the least common; so that the conclusion I am inclined to come 
to is, that they need not be separated even as varieties, and that, 
whatever doubts may remain as to some of the other named varie- 
ties, the great abundance of these two and the constancy of their 
general characters make it certain that together they will form 
a good species under the name of Lagena striata. A. few speci- 
mens of this species have a mucro at the base, and deformed ones 
are not uncommon ; these, besides having the body variously mis- 
shapen, often have the neck bent, sometimes even so much as to 
give the specimen the form of a retort. 
The Dogs Bay sand contains many forms of Entosolenia, some 
of them agreeing with those described by Professor Williamson, 
but others distinct ; and of these latter ] have ventured to name 
two, which may be described as follows:—1. Hntosolenia William- 
soni, a very abundant form, might pass at first sight for Lagena 
striata with the neck broken away, but a close examination shows 
it is a perfect shell, the body like Z. striata, but rather less full in 
proportion to its length than is usual in Connemara specimens, 
and the texture a little more glassy ; its chief peculiarity, how- 
ever, is in the neck, which is short and formed of two distinct 
portions, the first directly continuous with the body and having an 
outline similar to that of the lower part of the neck of Lagena 
abruptly cut short, and the second a cylindrical tube of com- 
paratively small diameter continued from the middle of it. The 
first portion is ornamented with three circles of hexagonal reticu- 
lations, which are continuous below by their inferior angles with 
the longitudinal costz of the body, and present an interesting 
combination of the superficial characters of #. costata and LF. 
squamosa.—2. Entosolenia Montagui is a squamous form, but 
differs from the named varieties of H. sqguamosa in having its 
surface really covered with a pattern like scales instead of with 
raised reticulations. Well-developed specimens are not all 
flattened, though many are found as if crushed, and they then 
present an appearance resembling a dried fig; the true shape, 
