236 
ZOOLOGICAL LITERATURE. 
Group of alhus : PI. Icevis (Alder), pi. 10. figs. 18-21 ; PI. agraulus (Bourg.) 
p. 159, pi. 10. figs. 22-25 j PI. numidicus (Bourg.), p. 160, pi. 10. figs. 26- 
29 j PL hrondeli (Raymond, Journ. Conch. 1853), p. 161, pi. 10. figs. 30-33. 
Group of imhricatus : the two European species, PI. imbricatiis (Miill.) and 
PI. cristatus (Dr.), pi. 10. figs. 9-13 and 14-17. 
Group of fontatius: PL euphceus (Bourg.), v. p. 165, pi. 9. figs. 35-38; PL 
diapfianellus (Bourg.), p. 166, figs. 39-42 ; IX raymondi (Bourg.), p. 166, figs. 
43-46. 
Planorbis duveyrieri, PI, aucapitainianus, and PL maresiamts are new species 
found in a suhfossil state only in the Sahara, on the road from El-Ouad to 
Ghadaines, and described by Bourguignat, Moll. terr. et fluv. de la Sahara. 
Planorbis billinysit, Lea, Proc. Acad. Nat. Sc. Philad. 1864, p. Ill, from 
the Ottawa River, California ; PL neioberryij Lea, ibid. p. 5, from California. 
— Planof'bis sinuosus, Bonnet, Rev. Zool. no. 9, from New Mexico 
bratus, Say ?]. — Planorbis schratmni, Crosse, Journ. Conch. 1864, p. 153, pi. 7. 
fig. 2, from Guadeloupe. 
Ancylus ceylanicus, Benson, Ann. & Mag. Nat. Hist. 1864, xiii. p. 139. 
Ancylus ovalis and A. borealis, Morse, 1. c. (p. 201), from Maine, U.S. 
Brondelia drouetiana and Brondelia gibbosa, described by M. Bourguignat in 
1853 and 1862, are figured in Malac. Alger, y. pi. 11. figs. 24-30 and 31-35. 
The genus Brondelia might, without inconvenience, be regarded as a sub- 
division of Ancylus, being only distinguished by a more minute apex which 
is bent towards the left. 
Suborder Thalassophila. 
SlPIIONARIll)A5. 
Siphonaria thersites, Carpenter, Ann. & Mag. Nat. Hist. 1864, xiv. p. 425, 
from the Vancouver district. 
Order PULMONATA OPERCULATA. 
Dr. Keferstein proposes for this order the name of Neuro- 
branchia, justly insisting upon the great differences wliieli exist 
hetAveen the organization of these mollusks and that of the 
Pulmonata inopereulata, as was admitted hy Cuvier. Broun, 
Thierreich, pp. 1025 and 1061. 
M. Stabile (Moll. terr. Piem. pp. 131-135) has systematically 
arranged the results obtained hy Prof. Troschel in his researches 
on the teeth of the radula. The arrangement does not offer any 
new feature, with the exception of the new name of Pseudo- 
rhipidiylossata, Avliich is proposed for the Cyclostomacea with an 
opercle of few whorls ; this family, more properly named Cy- 
clostomacea hy Prof. Troschel, comprises the subfamilies Licinea, 
Cyclostomea, and Cistulea of Mr. Pfeiffer^s monograph, first sup- 
plement. 
Dr. E. VON Martens has published a paper, Beincrkuiigen 
