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 BOTANY NAVICULACEJE (continued) Navicula cuspidata, Ktttz. W.C. dicephala, Ehr. didyma, Ehr. firma, Ktttz. forcipata, Cnw. gregaria, Donk. Hennedyi, W. Sm. var. clavata, V. H. humerosa, Brb. Iridis var. affinis, V.H. lineata, Donk. lyra, Ehr. maxima, Greg. musca, Greg. parvula, Eweg. placentula, Ktttz. var. anglica, Grun. ,, prastexta, Ehr. pygmata, Kdtz. rhyncocephala, Ktltz. Penzance serians, Kutz. W.C. Smithii, Br6b. sphaerophora, Kutz. W.C. stauroptera, Grun. Rough Tor Libellus rhombicus, De Toni. W.C. Grevillei, Cleve. Okcdenia inflexa, Eulenst. Pleurosigma acuminatum, Grun. angulatum, W. Sm. var. aestuarii, Brb. var. elongatum, V.H. var. quadratum, W. Sm. arcuatum, Donk. Padstow Balticum, W. Sm. W.C. decorum, W. Sm. distortum, W. Sm. formosum, W. Sm. Hippocampus, W. Sm. intermedium, W. Sm. lanceolatum, Donk. Padstow marinum, Donk. rigidum, W. Sm. W.C. Spencerii, W. Sm. Scoliopleura latestriata, Grun. tumida, Rabenh. Westii, Grun. Rhoicosigma compactum, Grun. Toxonidea Gregoriana, Donk. Padstow insignis, Donk. Frustulia Lewisiana, De Toni. neglecta, De Toni. rhomboides, De Toni. W.C. var. Saxonica, De Toni. Schizonema Dillwynii, C. Ag. ramosissima, C. Ag. Smithii, C. Ag. Berkeleya fragilis, Grev. obtusa, Grun. parasitica, Grun. AMPHITROPIDACE.S: Amphiprora alata, Ehr. gigantea, Grun. Penzance lepidoptera, Greg. Padstow maxima, Greg. W.C. Plagiotropis vitrea, Grun. CYMBELLACE.S: Cymbella aequalis, W. Sm. Rough Tor affinis, Ktttz. W.C. Cistula, Kirchn. var. maculata, Grun. cuspidata, Ktttz. Rough Tar cymbiformis, Brb. W.C. lanceolata, Kirchn. Encyonema caespitosum, Ktttz. prostratum, Ralfs. Amphora arenaria, Donk. decipiens, Grun. Hayle Erebi, Ehr. levissima, Greg. Penzance marina, W. Sm. membranacea, W. Sm. W.C. ovalis, Ktttz. var. pediculus, V.H. Sennen proteus, Greg. salina, W. Sm. GOMPHONEMACEJE Gomphonema acuminatum, Ehr. Sennen constrictum, Ehr. dichotomum, Ktttz. Penzance insigne, Greg. W.C. olivaceum, Ktttz. parvulum, Ktttz. Rhoicosphenia curvata, Grun. COCCONEIDACE/E Cocconeis diaphana, W. Sm. dirupta, Grev. placentula, Ehr. scutellum, Ehr. AcHNANTHACE.ffi Achnanthes brevipes, C. Ag. coarctata, Grun. exilis, Ktttz. longipes, C. Ag. minutissima, Kfltz. subsessilis, Ktttz. NITZSCHIACE.S: Nitzschia acicularis, W. Sm. acuminata, Grun. angularis, W. Sm. angustata, Grun. Padstow apiculata, Grun. Brebissonii, W. Sm. circumsuta, Grun. epithemoides, Grun. Penzance lanceolata, W. Sm. W.C. f. minor, V.H. Padstow linearis, W. Sm. W.C. macilenta, Greg. navicularis, Grun. 93