186 LAND AND FRESE WALER 
Subfamily Anyexm m, 
Genus Atycexvs, Gray, MS., B.M. 
Alyceus, Gray, Moll. Anim. & Shells Coll. Brit. Museum, 1850, 
p. 27; Benson, A. M. N. H.1859, vol. iii. p. 176; W. T. Blanford, 
A. M. N. H. 1864, vol. xiii. p. 445 (as a distinct subfamily) ; Theob. 
Supp. Cat. 1876, p. 7 (subfam. Alycwine); Nevill, Hand-list, 1878, 
p. 290 (subfam. Diplommatinina). 
Cyclophorus, sp., Pfr. Zeitsch. f. Malak. 1847, p. 108. no. 21. 
Original description :—* Operculum horny, many-whorled. Shell 
conical. Spire regular. Last whorl distorted, compressed, much 
contracted before the mouth. Mouth circular. Peristome regularly 
reflexed.” Type, A. gibbus, from Cochin China, the secon] and only 
other species recorded being A. strangulatus, from Landour, N.W. 
Himalaya, from the collection of Captain Boys. No mention is made 
of the peculiar and typical sutural tube. 
Dr. Pfeiffer divided the species into two groups, “ subturbinate ” 
and “ depressed ;” but in 1859 Mr. Benson was the first to put the 
rapidly increasing species into systematic order, based on better 
characters, the principal being the position and extent and form 
of the constriction, shape of shell, and length of the sutural tube. 
Of these he formed three sections:—1l. Alycwus, normal group, 
thus described: ‘The last whorl constricted somewhat remotely 
from the aperture, tumid on both sides of the constriction.” It 
contains ten species, in four subdivisions. 2. Charax, Bs.: ‘ Con- 
striction broad, contiguous to the aperture, and divided more or less 
remotely from it, across the whorl, by a ridge which is hollow 
internally.” There are six species given, divided again into three 
subsections :— 
“«* Ridge curved back remotely from the peri- 
SUOMMO ee ot a halaictne eae wep meen er A, hebes. 
** Ridge parallel to and approaching the peri- 
SEONG WC: tS oR ae see agains i Mae eee A, stylifer. 
*** Ridge parallel with and close to the base of 
the peristome’, Sa. Fs hia es ote ce A, plectocheilus.” 
3. Dioryx, Bs. “ Constriction narrow, and immediately behind 
the aperture ; the sutural tube arising proportionally nearer to the 
peristome than in Sections 1 and 2.” There are two subsections 
based on form of shell :— 
a. A. amphora, Bs. 
b. A. crenulatus, Bs. 
This last, however, certainly belongs to Sect. 2. 
As the sutural tube is one of the most important characters, I 
give what Benson very truly says of it :—‘‘ In estimating the length 
of the sutural tube, it is necessary to observe whether its brevity or 
mediocre size is permanent and natural, or due to decay or injury, 
especially in specimens which have become brittle from weathering. 
