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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1894 Excerpt:...N:o 99. Slightly brackish water: England (V. H. T.). Var. subsalsa Grun. 1860.--V. lanceolate with rostrate, not capitate ends. L. 0,o3; B. 0,oi i mm. Striae 9 to 11 in 0,oi mm.--N. tumida v. subsalsa Grun. Verh. 1860 p. 537 PL IV f. 43 b, c. A. D. p. 34. N. anglica Donk. B. D. PL V f. 11 b. N. anglica v. subsalina Grun. in V. H. Svn. p. 87 PL VLII f. 31. Slightly brackish water: Neusiedler See (Grun.), Shienitzer See, Prussia (Grun.). The var. subsalsa is nearly akin to N. dicephala and connects this species with N. Gastrum. 30. N. Gastrum Ehb. (1843).--V. lanceolate to elliptical, with slightly rostrate, obtuse ends. L. 0,o24 to 0,o45; B. 0,oi2 to 0,ois mm. Axial area very narrow. Central area large irregular, somewhat transverse. Striae 8 to 10 in 0,oi mm., finely punctate, in the middle usually alternately longer and shorter.--Pinn. Gastrum Ehb. Am. III: 7 f. 23. M. G. V: l f. 12. Strftse Klieken D. f. 1 b. N. Gastrum Donk. B. D. p. 22 PI. HI f. 10. Grun. A. D. p. 31. V. H. Syn. p. 87 PI. VIII f. 25, 27. Pant. III PI. III f. 48. Nav. exigua Pant. III PI. III f. 45 (1893). N. varians Greg. T. M. S. III p. 10 PI. II f. 27, 28 (1855). N. Hoffmannii Pant. II p. 47 PI. XIV f. 245 (1889)? Fresh water: Sweden! Finland! England! Ireland! Belgium (V. H.), Sea of Kara! Cape Deschneff! New Zealand! Illinois! Var. Jenisseyensis Grun. (1880).--Lanceolate. L. 0,o3s to 0,o65; B. 0,on to 0,oi7 mm. Striae about 9 in 0,oi mm. more distant in the middle, where there are only a few shorter ones among the longer, very finely lineate.--A. D. p. 31 PI. I f. 28. N. Basilica fPant. III PI. VIII f. 129 (1893)? Fresh or brackish water: Jenissey (Grun.), Cape Deschneff! New Zealand! New Caledonia (Kinker ColI.)! Var. latiuscula Grun. (1880).--V. lanceolate. L. 0,o24 to 0,o6; B. 0,...