162 
MOLLUSCA. 
Orthaltcus pfeifferif Hidalgo, figured by J. de Conch, xviii. pi. 6. f. 8. 
\_Chersina] Achatina virginea (L.). Dentition figured by Binney and 
Bland, /. c. p. 210, 211, woodcut; that of A. fasciata (Miill.), ibid. pi. 9. f. 0. 
[^Bulimulus] BuUmus pcdlidiory Sow. Photograph of the dentition, Binney 
and Bland, Ann. Lyc. N. Hist. ix. 1870, p. 282. — B, maridinus, Poey, jaw 
described by the same, Am. Journ. Conch, vi. p. 209. 
Bidimulus suj/lutus (Gould), the compound jaw figured by Binney and 
Bland, 1. c. pi. 9. f. 8 ; the dentition, ibid. f. 13. 
[Bulimidus] BuUmus chanchamayensisy Hid., kept distinct from canalku- 
latuSf Pfr., by the author, with some notes on B. atacamensis, Pfr., broderipi. 
Sow., atahualpa, Dohrn, and several species of Peeve and Pfeilier reduced 
with more or less probability to varieties by Hidalgo, 1. c. pp. 49-63 ; B. 
baezensis, Hidalgo, figured pi. 1. fig. 3, Ecuador. 
Cylindrella, Pfr. H. Crosse and P. Fischer ( J. de Conch, xviii. pp. 1-27) di- 
vide this genus, from the dentition, into two difierent types. The true Cylin- 
drellce are chiefly represented in the islands of the West Indies, and may be 
formed, together with the genus Macroceramus, into a distinct family, to be 
called CylindrellidcB, and to be placed near the Goniognatha of Dr. Morch. The 
genua Cylindrella may be distributed, with regard to the radula, in the fol- 
lowing manner : — 
Group 1. Cylindrella proper ; only two lateral teeth on each side, then 
following marginal ” teeth of very difierent form and in various number. 
C. trinitariafVh'.y gracilis, y^ood, bahainensis, Pfr., costata (Guilding), 
flwa, Adams, and brooksiana, Gundlach, pi. 3. figs. 7,8, pi. 4. figs. 1-3. This 
division will contain the groups called Casta, Trachelia, and Mychostoma by 
Albers. 
Group 2. Callonia (n. g.) : more than two lateral teeth, marginal teeth not 
very difierent; median tooth very narrow. — C. ellioti, Poey, pi. 3. figs. 9-13. 
Group 3. Thaumasia, Albers (p.) : more than two lateral teeth ; marginal 
teeth not difiering from them. C. perlata, Guiidl., vignalensis, Wright, brevis, 
Pfr., scoiva, Gundl, rosea^ Pfr., sanguinea, Pfr. pi. 4. figs. 4-G. 
Lia, Albers ; lateral teeth very numerous, with only one inner cuspid ; no 
different marginal teeth. L. maugeri. Wood, pi, 3. figs. 1-5. 
Macroceramus, Guilding : similar to the preceding, but with two distinct 
inner cuspids. M. signatus, Guilding, pi. 3. figs. 14-16. 
For the other type which agrees with the dentition of Helix, see Euca~ 
lodium and Holospira among the Aulacognatha. 
Cylindrella clercki, sp, n., Arango, MS., and C. geminata, sp. n. , Pfr. Mai. 
Bl. xvii. pp. 91, 02, both from Cuba. 
Elasmognatha. 
Athoracophorus modestus, sp. n. , Crosse and Fischer, 7 c. p. 238, New Caledonia . 
Triboniophorus sckuttei, Keferstein, 1865, anatomically described by R. 
Bergh, Verb. z.-b. Wiss. xx. pp. 843-854, pis. 11, 12, and 13. figs. 1-10; 
pi. 11. fig. 1 represents the living animal from a drawing made by G. v. 
Frauenfeld. The generic distinction of 2'ribuniophorus from Aneitea is called 
in question, the distinctness of the dorsal furrow and the exact shape of the 
jaw being subject to gradual differences. 
Succinca oblonga, Drap., found alive in very dry localities. Kobelt, Nachr. 
mal. Ges. ii. pp. 182, 183. 
