MOLLUSCA. 
471 
Vol. VI. contains : — Bulimus, 1315 sp., arranged under 66 
paragraphs, the chief divisions being taken from the peristome ; 
Par tula, 70 sp. ; Achatinella, 230 sp. ; Columna, 3 sp. ; SpU 
raxis, 83 sp. ; OrthalicMS (I3eck), 27 sp. j Perideris, 19 sp. j 
Pseudachatina, 7 sp. ; Limicolaria, 28 sp. ; Achatina (including 
Cfecilianella and Subulina), 230 sp., arranged under 9 para- 
graphs; Geostilbia (Crosse), Isp.; Ferussacia including Zua 
(Leach), 33 sp. ; Azeca, 21 sp. ; Tornatellina, 41 sp. ; Oleacina, 
130 sp. ; Pupa, 312 sp., under 24 paragraphs; Zospeum, 10 sp.; 
Pineria (Poey), 4 sp. ; Macroceramus (Guilding), 48 sp. ; Cylin- 
drella, 224 sp., arranged under 16 paragraphs; Megaspira,2^^.-, 
Balea (Prideaux), 22 sp. ; Clausilia (Drap.), 563 sp., arranged 
under 46 paragraphs. 
The Scandinavian slugs, which are nearly the same as in 
Middle and the rest of Northern Europe, are fully described and 
illustrated by A. W. Malm in a monograph published in the 
Memoirs of the Scientific Society of Goteborg, Sweden (see 
above, p. 427) . The entire animal, as well as the lingual teeth, 
is well figured. The author goes rather far in splitting genera. 
E. T. Newton has published a great number of observations 
on specific differences in the genital organs of various British 
species of Avion, Limax, and Helix, and in the arrangement of 
their muscles. Observations by Prof. Busk on the microsco- 
pical contents of various glands belonging to the genital system 
are added. Transact. Roy. Microscop. Soc. xii. pp. 26-31. 
SroLiczKA lias counted about 40 pulsations per minute in Nanina pollux, 
and 60 in Helix propinqua. They are much less frequent after tlie animal 
has retired into its shell, only about 1 7 in the latter species. Proc. As. Soc. 
Bengal, 1868, p. 263. 
Viviparous species are Conulus vacans and Tornatellina lamellata. Guppy, 
Ann. & Mag. Nat. Hist. i. pp. 436 & 437. 
Hibernation. Limax agrcstis, tencllus, Vitrina pellucida, Zonitcs fulvus, 
hammonis, Helix pulelxella, hispida, Arion horte^isis, Bulunus ohsctims, Pupa 
arenacea, muscorum, Clausilia laminata, and Balea perversa found in activity 
during the winter, January 1864-66; Limax agrestis, Vitrina pellucida, Arion 
liortensis, Helix hispida xa^pulchellay^exQ the first which made their appear- 
ance in April 1866, in the island of Gotland. Lindstrom, Gotlands niitida 
Mollusker, p. 40. 
VAGINULIDyE. 
Veronicella mgrmecophila, sp. n., Ileynemaim, Mai. Blatt. xv. p. 37, pi. 1. 
fig. 2, Prince Island, in the Gulf of Guinea. — V. langsdorji (F^r. ?), the teeth 
of the radula described and figured by the same, ibid. p. 100, pi. 4. fig. 1. — 
Veronicella ( Vagimdus) sloanci (F^r.), lingual teeth, Guppy, Transact. Linn. 
Soc. xxvi. p. 193, different from tliose of Onchidium . — Vagimdus langsdorji 
(Fer.) found at Porto Alegre by Dr. Hensel ; lingual teeth described by F. 
D. Heynemann, 1. c. p. 101, pi. 4. fig. 1. — V. tuherculosus, sp. n., Martens, ibid, 
p. 174, province Rio Grande do Sul. — V. hotiariensis, sp. n., Strobel, Atti Soc. 
