282 
ZOOLOGICAL LITERATURE. 
for true Assiminea as for true Cyclostomid(Byi\^ long tentacles; 
and from the descriptions alone it is sometimes impossible to 
decide to what genus a species belongs. 
Further, Dr. Pfeiffer unfortunately persists in regarding the 
subfamilies Cyclotea, Qyclophorea, Licinea, Cyclostomea, Cistulea, 
.and Pomatiatea as divisions of equal coordinate value. The 
examination of theradula proves, and the geographical distribu- 
tion confirms (see Zool. Ilecord, i. p. 237), that the Cyclotea 
and Cyclophorea on the one hand, and the Licinea, Cyclostomea, 
and Cistulea on the other, ought to be grouped together. The 
difference between a thin horny and a thick shelly opercle 
is of little importance indeed, as may be seen in Alycceus, a most 
natural genus, some species of which have a Jhin and others 
a thick opercle ; the same difference in the opercles occurs in 
the most natural genera Ampullaria and Natica. The subfamily 
Pupinea has the same radula and opercle as the Cylophorea ; but 
nevertheless it may be kept distinct, the shape of the shell being 
very decidedly different and no intermediate form being known to 
exist ; but then, also, Pollicaria ought to be retained among the 
Pupinea, although its opercle is shelly like that of the Cyclotea. 
The family Helicinacea is subdivided into three subfamilies, 
Stoastomea, Helicinea, and Georissea, the last containing the 
new Indian genus Georissa (Blanford) . 
Bland, Th. Note on the buccal plate (jaw) in certain genera 
of the family Cyclostomacea. Am. Journ. Conch, i. pp. 45 
& 46, with plate 5. 
The buccal plate of Cyclotus stramineus (Reeve) and Megalomastoma cylm- 
draceum (Chemn.) are figured, both generally agreeing with those of O aspe- 
dopoma and Pomatias described by Troschel. The [restricted] genus Cyclo- 
stoma, however, has no buccal plate. 
Cyclophoridas. 
New species : — 
Cyclotus longipilus and fulrnmulatus, Martens, Monatsb. Akad. Wiss. Berk 
18G4, p. 61, Celebes; C. campamdatus, Martens, 1. c., Nagasaki. 
Pterocyclos tcilsoni, Pfeiffer, Proc. Zool. Soc. 1866, p. 831, pi. 46. fig. 12, 
Formosa; P. fcddeni, Blanford, Journ. As. Soc. Bengal, 1866, p. 83, Pegu; 
P. parva [-ws]. Pease, Am. Journ. Conch, i. p. 290, Polynesia. 
Cyclophorus {Lagochilui) leporinuSy Blanford, 1. c. p. 82, Pegu. 
Cyclophorus cruentus, Martens, Ann. & Mag. Nat. Hist. xvi. p. 429, Samar, 
Philippines ; C. hellulus, Martens, Monatsb. Akad. Wiss. Berl. 1864, p. 62, 
Borneo ; C. ciliocmctus, Martens, 1. c., Java ; C. upolemis, Mousson, Journ. 
Conch, xiii. p. 180, Samoa Islands. 
Cyclophorus ? scalariformis, Pease, Am. Journ. Conch, i. p. 289, Polynesia. 
Operculum described, agreeing with that of Cyclophorus^ but the shell re- 
sembling that of Vertigo. The author suggests the establishment for it of a 
