4 4 LIVERPOOL BIOLOGICAL SOCIETY. 
A. plicata, Greg. Rhyl, rare. 
A. pusilla, Greg. Bangor, rare. 
A. vitrea, Greg. Hoylake, rare. 
Amphora (Khr.) affinis, Kutz. Queen’s Ferry, common. 
. binodis, Greg. Ince Marsh, rare. 
. hyalina, Kutz. Mostyn, very common. 
.commutata, Grun. Burton Marsh, rare. 
. complexa, Greg. Mostyn, rare. 
. levis, Greg. Ince Marsh, rare. 
. itoralis, Dn. Bhyl, rare. 
. membranacea, W.Sm. Holywell, rare. 
. minutissima, Gray. Helsby Marsh, rare. 
. salina, W. Sm. Connah’s Quay, common. 
. spectabilis, Greg. Mostyn, rare. 
. ventricosa, Greg. Ince Marsh, rare. 
AR ea PPP aA A A A 
Asterionella (Hassal) bleakleyti, W.Sm. Surface of the 
Dee, common. 
A. ralfsti, W.Sm. Surface of the Dee, rare. 
These forms are often very abundant in the summer. 
A. bleakleyiti grows in long continuous filaments lke a 
corkscrew.* 
Atheya (West) decora, West. Surface of the Dee, very 
rare. This form was described by Mr. West in the Trans. 
Micro. Soce., vol. viii., 1860, and I do not know of its having 
been seen by any one since. I found it on the Dee in 1874 
for the first time, and have seen it two or three times since 
in surface gatherings. 
Bacteriastrum (lauder) varians, Lauder. Surface of 
Dee, common. 
| Berkleya (Grev.) obtusa, Grev. Puddington Marsh, rare. 
* Vide Trans. of Micro. Soc., vol. viii., 1860, Mr. West’s paper 
