MARINE DIATOMACEZ OF THE L.M.B.C. DISTRICT. Ill 
S. gallionu, Ehr. Isle of Man, rare. 
S. obtusa, W. Sm. Helsby Marsh, common. 
S. pulchella, var. acicularis, Kutz. Mostyn, common. 
Toxomidia (Dn.) gregoriana, Dn. Connah’s Quay, rare. 
T. insignis, Dn. Surface of Dee, rare. 
Tricerattum, (Ehr.) brightwellii, West. Surface of Dee 
rare. 
? 
T. favus, Khr. Connah’s Quay, very rare. 
T. striolatus, Ehr. Surface of Dee, rare. 
1. favus, which is so common in the estuary of the 
Thames, is a very rare form in this district, and not 
common on the west side of England. 
