60 Moll. 
MOLLDSCA. 
1 . Monotremata ; male and female orifices united : 
A. AgnatJia: Testacellulce. 
B. Gnathophora: Limacidce, Tebemophoridce, Ilelicidce^ Cylin- 
drellidce^ Orthalicidce^ Bulimulidcej Stenogyridce^ and Succi- 
neidce. 
2. Ditremata ; male and female orifices widely separated : 
Vaginiilidce, terrestrial, and Oncidiidce, aquatic. 
Agnatha. 
G. Pfefper gives a general account of the external and anatomical 
peculiarities. Neck commonly elongated, tail rather short, lips often 
developed into feeler-like appendages ; shell-lobes of the mantle present 
in Testacella and Glandina, cervical lobes in all genera. Back of the 
neck peculiarly furrowed. Pharynx elongate behind. No jaw ; teeth of 
the radula aculeiform, in angulate rows, median tooth less developed or 
wanting. Intestine only once twisted, with anal gland, Male organ 
directly receiving the vas deferens, and provided with a coecal appendage 
for the insertion of the retractor muscle. Hermaphrodital gland tubulose 
in the Streptaxidce ; acinose in the rest. Ganglia less concentrated than' 
in other Pulmonata. Carnivorous. He distinguishes three sub-divisions : 
Streptaxidce (including Ennca), Testacellulce (including Daudehardia)^ and 
Glandinidce, JB. mal. Ges. v. pp. 62-84, with woodcuts. 
A membranaceous homologue of the jaw is found in Daudehardia, and 
a still more indistinct chitinous thickening in its place in Testacella^ 
Ennea, and Streptaxis; Pfeifer, Nachr. mal. Ges. 1878, pp. 41 & 42. 
Testacella haliotidea (Dr.) : note on the outer appearance of the animal 
and its genital organs, by G. Pfeffer, 1. c. pp. 74-77. 
Daudehardia. S. Clessin, Mal. Bl. xxv. pp. 98 & 99, enumerates the 
known (16) species, placing them in 2 subgenera : — 
1. Rufina, subg. n., shell umbilicated : D. rufa (Drap.), &c. 
2. Lihania (Bourg., 1870), with covered umbilicus : D. langi (Pfr.), 
transsylvanica (Bielz), saulcii (Bourg.), and sicula (Benoit). 
Daudehardia transsylvanica (Bielz) : note on its pharynx and genital 
organs; Pfeifer, 1. c. pp. 77-79. 
Daudehardia Tiassiaca, Clessin, Mal. Bl. xxv. p. 96, Cassel ; D. hey deni ^ 
Bottger, Nachr. mal. Ges. 1878, p. 120, Kasbek, Caucasus: spp. nn. 
Glandina liehmanni (Pfr.), note on the male genital organs; Pfeifer, 
1. c. pp. 80 & 81. 
Glandina ecuadoriana, sp. n., Miller, Mal. Bl. xxv. p. 169, pi. vii. fig. 1, 
Val de Pilaton, Ecuador. 
Streptaxis and Ennea : their alliance asserted by J. S. Gibbons, Q. J. 
Conch. 1878, No. 15, p. 336 [long ago known to malacologists] . 
Streptaxis apertus (Mart.), anatomical note, and dejectus (Petit), radula ; 
Pfeifer, JB. mal. Ges. v. pp. 69 &. 70, with woodcut. 
Streptaxis denticulatus, Mombas, and schweitzeri. Liberia, Dohrn, JB. 
mal. Ges. v. pp. 162 & 153 ; S. enneoides^ Martens, MB. Ak. Berl. 1878, 
p. 295, pi. ii. figs. 6 & 6, Ukamba, near Zanzibar : spp. nn. 
Ennea insignis (Pfr.), anatomy given by G. Pfeffek, with notes on 
