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N. (Stauroneis) punctata. (Kiitz.) Bare — in moss washings, 
Heigham, Whissonsctt. 
N. (Finn.) borealis. (Ehr.) Moss from trees, very rare. 
N. lineata. ? (Greg.) Wells — rare. 
N. maxima. (Greg.) Wells sands. 
N. hy alina. (Donk.) Very rare— Hunstanton. 
N. varians. (Greg.) Moss, Osier Car ; Whissonsctt. 
FT. cruciformis. (Donk.) Ivare — Wells. 
N. scutelloides. (Greg.) Ormesby Broad. 
Genus Pleurosigma Smith. 
P. elongatum. Sm. Common — in the Breydon and Wells 
gatherings. 
r. strigosum. Sm. Common— in brackish- water localities. 
1’. angulatum. Sm. Frequent — in all salt-water ditches. 
1*. quadratum. Sm. This species is almost invariably associated 
with the preceding, of which probably it is only a variety. 
P. elongatum. Sm. Bitches, Breydon and Wells. 
P. jESTUarii. Sm. Not common — Hunstanton sands, 
r. marinum. (Donk.) Wells and Hunstanton sands. 
P. balticum. Sm. Frequent and fine — in the Breydon ditches. 
P. strigilis. Sm. Mixed with above species, but rare, 
r. fasciola. Sm. Eiver Bure, near Yarmouth, and Breydon 
ditches — rare. 
r. hippocampus. Sm. In most brackish-water localities, but not 
common. 
r. lacustre. Sm. Whissonsctt, Poringland, Ormesby — frequent. 
P. spenceri. Sm. Whissonsett, Ormesby. 
P. transversale. Sm. Wells and Hunstanton sands. 
P. normanii. (Ralfs.) Stomachs of Xoctiluca?, Yarmouth. 
Genus Toxonidea Donkin. 
T. insignis. Donk. More or less frequent in sand gatherings ; 
Hunstanton, Brancaster, Wells. 
T. gregoriana. Donk. Associated with the preceding. 
