64 Moll . 
MOLLUSCA. 
Sub-family Naninince [= Naninidce, Zool. Rec. xv. Moll. p. 61]. 
I. Series Macrochlamys-Parmarion. Mantle-lobes much developed, 
shell more or less reduced, in some genera internal. 
Macrochlamys (Bens.), including sogdiana and turanica (Mar- 
tens), splendens (Hutt.), konesta (Gould, Semper, nec Sto- 
liczka), and resplendens (Troschel). 
Belicarion , Fer., subg. s. str., jaw toothed, radula typucal. H. 
suturalis and plica lulus (Martens), cuvieri (Fdr.), permollis 
(Stoliczka), and some other species anatomically described by 
/ y C. Semper. 
Zonitarion , subg. n. (name only, 1878), jaw without tooth, teeth 
/ of the radula in overlapping rows, their sides flattened. Z. 
semimembranaceus (Martens) and resiliens (Beck). 
Dendrolimax (Dohrn), Parmarion (Fischer), Tennentia (Hum- 
bert), and Urocyclus (G ray); Parmarion papillaris (Fischer) 
and Urocyclus flavescens (Keferstein) are also described. 
II. Group of the genus Xesta. Either the mantle-lobes or the tri- 
partite quality of the foot or both reduced, sometimes obsolete. 
Xestina (Pfeifer, 1878) ; II. politissima (Pfr.) may belong to it. 
Xesta (Albers) ; X. citrina (L.), limbata (Martens), vitellus 
(Shuttl.), /w/y^ona (Mouss.), wallacii (Pfr.), and distincta (Pfr.). 
Ariophanta (Desmoul.), no ccecal appendages at the penis ; the 
lines of growth in the shell form a much more acute angle 
with the suture than in Xesta. A. Icevipes (Mull.), cidaris 
(Lam.), explanata (Q. & G.), martini (Pfr.). 
Hemiplecta (Albers) ; II. isabellina (Pfr.), siamensis (Pfr.), seti- 
gera (Sow.), gummata (Pfr.). 
Rhysota (Albers). 
Euplecta (Semper) ; E. subopaca (Pfr.), layardi (Pfr.), subcon- 
oidea (Pfr.). 
in. The genus Eurypus (Semper) is distinct by a very small flagel- 
lum, and the absence of glandulse mucosae. E. hoyti (Garr.) 
and cascus (Gould). 
iv. Series Thapsia-Lamprocystis. No glandulae mucosae ; coecal ap- 
pendages gradually disappearing. 
Thapsia (Albers); T. calamechroa (Jonas), chrysosticta (Morelet) 
[= mechowi , Dohrn], indecorata (Gould), renitens (Morelet) ; 
T. troglodytes (Morelet) is anatomically somewhat different 
from the rest. 
Lamprocystis , g. n., = Microcystis of most authors, not of Beck, 
whose first species are American ; mantle lobes more or less 
reduced ; jaw with a feeble median tooth ; ovo- viviparous. 
L. ( M .) excrescens (Mouss.), firmostyla (Mouss.), perpolita 
(Mouss.), my ops (Semper), succinea (Pfr.). 
V. Series of Trochonanina , characterized by the want of a true re- 
tractor of the penis, but provided with an appendicular gland. 
Self-fecundation in some of them. 
Martensia ; M. (Semper), mossambicensis (Pfr.). 
Inozonites , g. n. Mantle lobes complete; genital organs very 
