46 Moll. 
MOLLUSCA. 
arct. Norveg. pp. 171-173, pi. ix. fig. 12, & pi. xxii. figs. 3 & 4; radulaof 
the first, pi. vi. fig. 10 ; operculum, pi. xviii. fig. 18. 
Cingula tumidula, sp. n., Vardo, and castanea (Moller), id. 1. c. pp. 174 
& 173, pi. X. figs. 1 & 2 ; radula of C. cingillus (Mont.), ibid. pi. vi. fig. 11 ; 
operculum, pi. xviii. fig. 19. 
Shenea planorhis (Fabr.), radula, id. 1. c. pi. vi. fig. 16 ; operculum, 
pi. xviii. fig. 23. 
Hydrohia (Hartmann, 1821) = P aludestrina {Ovh.^ 1839); Littorinella 
(Braun, 1842); Paludinella (Pfr., Assiminea \ (Gould), 
probably a distinct genus, Bythinella (Moq. Tand., 1855), and Peringia 
(Paladilhe). P. Fischer discusses the value and original signification of 
these genera, and comes nearly to the same results as the Recorder gave 
in Arch. f. Nat. xxiv. 1858, pp. 187-193, which paper was unknown to 
him ; a further rival name, ieacMa (Risso, 1826), is not mentioned : 
J. de Conch, xxvi. pp. 133-137. 
Hydrohia ulvoi (Penn.) and minuta (Totten) = halihica (Nilss.), are 
specifically distinct, the former being rather rare on the coast of Norway, 
the latter abundant in the inlets and sounds ; Sars, Moll. arct. Norveg. 
pp. 170 & 171, pi. xxii. fig. 2, & pi. ix. fig. 11 ; Radula of the first, pi. vi. 
fig. 9; operculum of the second, pi. xviii. fig. 17. 
Hydrohia haltica (Nilss.), with whorls more convex than usual, in a 
pond near the shore at the mouth of the river Jade ; H. ulvoi (Penn.) in 
salter water of the sea itself in the same district: H. v. Heimburg, 
Nachr. mal. Ges. 1878, p. 4. 
Hydrohia achaia, sp. n., Clessin, Mal. Bl. xxv. p. 121, pi. v. fig. 3, 
Euboea. 
Amnicola glohosa, stossichi, both from Dalmatia, negropontina, Euboea, 
elevata^ Welebit Mountains, Croatia, apennina, Apennines, numidica^ 
Algeria, spp. nn., Clessin, Mal. Bl. xxv. pp. 115-119, pi. iv. figs. 1-5, 
& pi. V. fig. 4. 
Somatogyrus trothis, sp. n., Doherty, Q. J. Conch. 1878, No. 15, p. 341, 
Ohio River. 
Bythinella schmidti (Charp.) : anatomical description by S. Clessin, 
Mal. Bl. xxv. pp. 149-152, pi. vi. (radula). 
Bythinella vjelebitana^ Clessin, Mal. Bl. xxv. p. 121, pi. iv. fig. 10, 
Welebit Mountains, Croatia. 
Vitrella tschapeclci, sp. n., Clessin, Nachr. mal. Ges. 1878, p. 10, cave 
near Sanriack, in Carinthia. 
Frauenfeldia^ new generic name (without generic characters) proposed 
for Hydrohia lacheineri (Pars.) by Clessin, Nachr. mal. Ges. 1878, p. 130. 
Belgrandia (Bourg.). Note on the living species by Clessin, Mal. Bl. 
xxv. p. 101, & Nachr. mal. Ges. 1878, pp. 127-130 ; he refers to this 
genus also Bythinia saviana (Issel) [which is, according to the locality, 
the true Turbo thermalis, Linn., nec auctt.]. 
Belgrandia occidentalis, sp. n., Clessin, Mal. Bl. X 2 ^v. p. 120, pi. iv^ 
figs. 7-9, Coimbra. 
Diana [||, Risso, Pisces, 1826], subg. n. of Pyrg\da\ first whorls very 
small, the three last nearly of equal height. P. (Z).) thiesseana, sp. n., 
Missolunglii, Clessin, Mal. Bl. xxv. p. 127, pi. v. fig. 8. 
