Brackish-water Foraminifera. 305 
Patellina corrugata, Williamson. 
Pateltina corrugata, Williamson (1858), Rec. For. Gt. Br. p. 47, pl. 3. 
figs. 86-88. 
A considerable number of small specimens of this interest- 
ing type occurred amongst the microzoa from Montrose Basin, 
and a few in the Blyth estuary; elsewhere it has not been 
noticed in brackish water. Hitherto Patellina corrugata has 
been regarded as a deep-water species, and has been rarely 
met with on the east coast. 
Polystomella striatopunctata, Fichtel & Moll, sp. 
Nautilus striatopunctatus, Fichtel & Moll (1803), Testacea Microscopica, 
. 61, pl. 9. figs. a—e. 
The commonest of all Foraminifera inhabiting brackish 
water. In the Fen district its distribution is curiously irre- 
gular, following that of Rotalia Beccarti very closely. In 
two of the western Scottish localities it has not been observed, 
possibly owing to insufficient quantity of material; but wit 
these exceptions it has been invariably and abundantly pre- 
sent even in the areas furthest removed from the open sea. As 
before stated, specimens, apparently living, were found in one 
locality where the water was absolutely fresh ; and it existed 
plentifully in a pool near the river Wear, in which analysis 
showed only one per cent. of saline constituents. In such cases 
the shell-wall is exceedingly thin and transparent, and the 
shells are often of a pale green colour, but otherwise have cha- 
racters identical with those of marine origin. The entire ab- 
sence of the type (P. crispa), so common almost everywhere in 
marine gatherings from our shores, is worthy of note. There 
is but little doubt that the present form is only the depaupe- 
rated condition of the more robust typical species. 
Nonionina asterizans, Fichtel & Moll, sp. 
Nautilus asterizans, Fichtel & Moll (1803), Testacea Microscopica, p. 37, 
pl. 3. figs. eh, 
In the estuaries of the Alne, Blyth, Tees, and Scheldt; very 
rare, i 
The typical N. asterizans is scarcely distinguishable from 
e specimens of N. depressula, except by the slight de osit 
of clear shell-substance radiating from the umbilicus. Mor- 
phologically it lies between N. depressula and N. stelligera, 
the latter having an extreme development of the stellate sutural 
limbation. Both N. asterizans and N. stelligera are very rare 
m the British seas. 
Ann. & Mag. N. Hist. Ser. 4. Vol. vi. 20 
