A HISTORY OF CORNWALL DESMIDIACE.S (continued) Cosmarium bioculatum, Br6b. W.C. Boeckii, Will. Bodmin Botrytis, Menegh. Penzance Brebissonii, Menegh.
- Broomei, Thw. N.C.
caslatum, Ralfs. Bodmin, Rough Tor
- commissurale, Br6b. St. Just
crenatum, Ralfs. W.C. var. subcrenatum, Rab. cristatum, Ralfs. N.C. cylindricum, Ralfs. W.C. discretum, Benn. Roche, St. Dennis erosum, Delp. Penzance galeritum, Nordst. W.C.
- granatum, Br6b.
Hammeri, Reinsch. laeve, Rab.
- Lundelii, Delph. Mousehole
margaritiferum, Menegh. W.C. melanospermum, Arch. Bodmin Meneghinii, Br^b., var. angulosum, Rab. Penzance
- moniliforme, Ralfs. Penzance
orbiculatum, Ralfs. ornatum, Ralfs.
- Phaseolus, Breb. W.C.
Portianum, Arch. pseudopyramidatum, Lund. W.C. var. stenonotum, Raddi. Penzance pyramidatum, Br6b.
- quadrimammillatum, West & G. S.
West. Lizard Regnesii, Reinsch. Penzance rectangulare, Grun. Bodmin reniforme, Arch. W.C. speciosum, Lund. N.C. sphaericum, Benn. tetraophthalmus, Breb.
- tinctum, Ralfs.
undulatum, Corda. Wittrockii, Lund. Arthrodesmus convergens, Ehr. incus, Hass. octocornis, Ehr. Euastrum affine, Ralfs. W.C. binale, Ralfs. crassum, Ktitz. var. Cornubiense, Benn. St. Dennis crenulatum, Benn. N.C. didelta, Ralfs. W.C. elegans, Kdtz. erosum, Lund. N.C. gemmatum, Brb. insigne, Hass. Lizard, Penzanct insulare, Wittr. N.C. oblongum, Ralfs., var. Cornubiense, Benn. Ma-wgan, W.C. pectinatum, Breb. Penzance pulchellum, Breb. 96 DESMIDIACE.S: (continued) Euastrum *rostratum, Ralfs. W.C. verrucosum, Ehr.
- Euastropsis Richteri, Lagerh. Sennen ;
previously found only in Norway and Germany Micrasterias denticulata, Ralfs. W.C. Jenneri, Ralfs. mucronata, Rab. Penzance papillifera, Breb. W.C. radiosa, C. Ag. rotata, Ralfs. truncata, Breb. Staurastrum apiculatum, Br6b. Penzance alternans, Breb.
- asperum, Br6b.
- avicula, Br6b.
bifidum, Br6b. W.C. brachiatum, Ralfs. brachycerum, Brb. Sennen brevispina, Brb. W.C. controversum, Brb. cristatum, Arch.
- Cornubiense, Benn. Roche
- cuspidatum, Brb. Penzance
cyrtocerum, Brb. W.C. dejectum, Brb.
- Dickiei, Ralfs. Penzance
dilatatum, Ehr. W.C. dispar, Br6b. furcatum, Ehr. Penzance furcigerum, Brb. W.C. glabrum, Ralfs. gracile, Ralfs. granulosum, Ralfs. Crowan hirsutum, Breb. W.C. inconspicuum, Nordst.
- lunatum, Ralfs.
margaritaceum, Menegh. Pen- zance
- monticulosum, Bieb. W.C.
mucronatum. Penzance
- muricatum, Brb. W.C.
- muticum, Brb.
orbiculare, Ralfs. paradoxum, Meyen. pilosum, Arch. Rough Tor polymorphum, Br^b. W.C. polytrichum, Perty. pterosporum, Lund. Penzance
- punctulatum, Breb. W.C.
- pungens, Brb.
pygmaeum, Br6b. Penzance
- sexcostatum, Brb. W.C.
spinosum, Brb.
- spongiosum, Br6b.
teliferum, Ralfs. tetracerum, Ralfs. tumidum, Brb. vestitum, Ralfs. St. Just
