66 Moll. 
MOLLUSCA. 
Microcystis schmaclceriana , sp. n., Yon Mollendorff, JR. mal. Ges. ix. 
p. 184, Hongkong. 
Microcystinct rinlri (Morch), Nicobars, anatomy and radula, warneforcli , 
Andamans, mcerchiana, Kondul Isl., Bay of Bengal, cryptomphalus, Lower 
Bengal, and harrietensis, Andamans, spp. nn., Godwin-Austen, l. c. pp. 
11-16, pi. iii. 
Zonites latissimus , sp. u., Dohrn, JB. mal. Ges. ix. p. 117, South of 
Samarcand. 
Selenites (Fischer) vancouverensis (Lea), concava (Say), voyana (Newc.), 
with var. n. simplicilabris , sportella (Gould), and duranti (Newc.), the 
last forming subg. n. Haplotrema , comparatively described ; Ancey, l. c. 
pp. 110 & 111. 
Ammonocevas niiidulus and amazonicus , spp. nn., Prov. Para, Brazil, 
and A. trochilionoules (Orb.) = spirillus (Gould), all more nearly allied to 
Streptaxis than to Hyalina ; Dohrn, JB. mal. Ges. ix. pp. 97-09. Ilya- 
linia hemphilliana (Binn.), and ingersolli (Bland), are to be placed in the 
subgenus Ammonoceras ; Ancey, l. c. p. 29. 
Hyalina. M. Schepman has examined the dentition of numerous 
species, and arranges them according to differences in the dentition, 
which is figured for all the species mentioned as follows : — 
1. Conulus (Fitz.), Il. fulva (Drap.), dentition pi. vi. fig. 1. 
2. Zonitoides (Lehm.), II. nitida -(Mull.) and excavata (Bean), pi. vi. 
figs. 2 & 3. 
3. II. olivetorum (Gm.), hiulca (Jan.), nitens (Mich.) and nitidula 
(Dr.), the two last very closely allied, pi. vi. figs. 4-7. 
4. H. para (Alder), pi. vi. fig. 8. 
5. II. filicum (Kryn.), Jcoutaisiana (Mouss.), draparnaldi (Beck), villce 
(Mortillet), alhambrcc (sp. n. P), cellaria (Mull.), alliaria (Millet), 
helvetica (Blum) and glabra (Stud.), dentition pis. vii. & viii. 
figs. 9-17. 
6. II. hammonis (Strom.) and petrone.Ua (Charp.), pi. viii. figs. 18 & 19. 
7. Vitrea (Fitz.), H. crystalling (Midi.) var. subterranea (Bourg.) and 
diaphana (Stud.), pi. viii. fig. 20 & 21. JB. mal. Ges. ix. 
pp. 236-243, pis. vi.-viii. 
Clessin subdivides the same genus also according to the dentition as 
follows: — 
1. Euhyalina (Alb.), II. cellaria (Midi.), balinii (Hid.), draparnaldi 
' (Beck), glabra (Stud.), hiulca (Jan.), alliaria (Mill.) 
2. Polita (Held.), type II. pura (Alder), also II. nitens (Mich.), radia- 
tula (Aid.), petronella (Charp.), arborea , indentata , minuscula 
(Say), and milium (Morse). 
3. Vitrea (Held.), II. crystallina (Miill.), and binneyana (Morse). 
The dentition of the species here mentioned is shortly described. 
Mal. Bl. (2) v. pp. 154-161. 
Ilyalina cellaria (Miill.), draparnaldi (Beck), and glabra (Stud.), 
number and size of the teeth and number of points in the single teeth 
increasing by age ; Sterki, Nachr. mal. Ges. 1882, pp. 172-178. 
