OASTllOrODA (rECTINIBRANCHIA). 
Moll 49 
L. mauritiana (Lam.) probably = the European neritoidcs (L.) [? ?], and 
ziczac, unifasciata, and undulata^ are merely varieties of it [? ?] ; J. E. T. 
Woods, P. Linn. Soc. N. S. W. iii. [1878], pp. 59 & G5-G9 ; abstract in 
J. It. Micr. Soc. ii. p. 401. 
Litorina litorea (L.) found on the coast of North America ; A. Gray, 
Science News, i. p. 11 1. 
Risella (Gray). A number of species reduced, R. lutea (Q. & G.) being 
a sexual variety of i^lana (Q. & G.), and melanostoma (Gm,), aiirata 
(Q. & G.), and nmia (Lam.), sexual or accidental varieties ; J. E. T. 
Woods, op. cit. i. [1876] pp. 242-249. All species hitherto described pass 
one into the other, and form only one very variable species ; id. op. cit. 
iii. [1878] pp. 62-64. 
Plesiotrochus souverhianus (Fischer, 1878), fully described and figured 
by the author ; J. de Conch, xxvii. p. 29, pi. iii. fig. 4, Lifu, Loyalty 
Islands, New Caledonia. 
Fossarina legrandi^ sp. n., Petterd, J. of Conch, ii. p. 104, Tasmania. 
Eissoid;e. 
Rissoina e^icata, teres^ pulchella, inermis, cardinaUs, and compicucty 
spp. nn., Brazier, P. Linn. Soc. N. S. AV. i. [1876] p. 865, North Australia. 
Fenella reticulata (A. Ad.), from Rodriguez; E. A. Smith, Pliil. Tr. 
clxviii. p. 478, pi. li. fig. 6. 
Rissoa griegi and semipellucida^ spp. nu., Frielo, JB. mal. Ges. vi. 
p. 274, Spitzbergen, 1,333 fath. 
Rissoa tliomsoni (Leche), from Novaja Zemlya, copied ; JB. mal. Gos. 
vi. pi. iv. fig. 6. 
Cingula janmaycni (Friele, as Rissoa), areolata (Stimps., as Turritella)^ 
and casianea (Moller, as Rissoa), found at Maine ; Verrill, Am. J. Sci. (.3) 
xvii. pp. 311 & 312. 
Faludestrina ecuadorina and hcetzlcesi, spp. nn.. Miller, Mal. Bl. (2) i. 
pp. 153^155, pi. viii. figs. 3 & 4, River Guayaquil. 
Hydrohia quenstedti (Wiedersheim) e= vitrea (I)r.), var. ; Fries, Zool. 
Anz. ii. p. 163. 
Hydrohia decUnata (Frauenfeld), Var. n. soneUa, AVestel’lund, Falini 
mal. Gr^ce, p. 139, Euboea. 
Hydrohia pedrina, sp. n., Miller, Mal. Bl. (2) i. p. 155, pi. vi. fig. 7, Rio 
Pedro, val Chillo, Ecuador. 
Thermydrohia thermalis (L.) = Bythinia saviana (Isscl), hot springs of 
San Giuliano, near Pisa [already stated by the Recorder in 1867], distinct 
from Belgrandia, sp. from Lucca ; M. Paulucci, JB. mal. Ges. vi. 
pp. 64-67. 
Amnicola longinqua (Gould), living in Utah, range of variation in the 
shape of the shell ; Stearns, Am. Nat. xiii. p. 147, woodcut. 
Amnicola carolii, sp. n., with var. scalarina, Mme. Paulucci, Faun. mal. 
Calabr. pp. 202-204, pi. ix. figs. 7 & 8, Calabria ; A. vestita (Benoit), eacl. 
1. c. p. 201, Sicily and Calabria. 
Baikalia (Martens, 1876) restricted to Hydrohia angarensis (Gerstf.), 
Leucosia angarensis, var. elata and pulla (Dyb.), which are regarded as 
