64 
THE . CONCHOLOGISTS’ - EXCHANGE 
DESCRIPTION OF NEW GENERA 
OR SUBGENERA OF 
HELICIDA. 
BY C. F. ANCEY. 
(Continued.) 
XII. Mdllendorfia, Ancey. ‘Testa medi- 
“ocris, solidula, convexo-depresso, aperti um- 
‘bilicata, griseo vel nigro-vinosa, haud nitens, 
“seriebus, verrucarum eximie pustulata. An- 
“fractus 5, ultimus antice plerumque breviter 
“solutus et perdeflexus, rotundatus, infra con- 
‘vexus. Apertura obliqua, ringens, alba, extus 
“scrobiculata. Peristoma reflexum, album.” 
Types. Helix trisinuata, Mart.; H. Hen- 
saniensis, Gredler; H. Eastakeana, Mdllen- 
dorff. 
Geog. distribution: Central and Southern 
China (Valley of the Yang-tse-Kiang); Ton- 
kin. 
Some of these shells have been referred to | 
Cepolis by Pfeiffer, while Gredler put his Hen- 
saniensis in Polygyra,a strictly North American 
genus! ‘They are a very distinct group, with 
a singular sculptute and peculiar features. 
XIII. Trichelix, Ancey. ‘Testa medio- 
‘cris staturze, tenuiuscula, pilis rigidis horrida, 
“corneo-fulva, umbilicata. Spira concava; 
“anfractus regulariter crescentes, ultimus maxi- 
“mus, turgidus, antice deflexus, 
“obliqua, extus scrobiculata, dentata. 
“toma labiatum et reflexum.”’ 
Type. Helix horrida, Pfeiffer. 
Geog. distribution: Mountains of Laos. 
XIV. Entodina, Ancey. “Testa parvula, 
“compressa, orbicularis, subtenuis, striata, flav- | 
“ula, parum nitens, late et perspective umbili- 
“cata, 
Apertura | 
Peris- | 
_ paucispirata, 
_ “subexpanso preedita. 
Anfractus regulariter crescentes nec | 
“artispirati, ultimus depressus, antice deflexus. | 
* Apertura obliqua, breviter soluta, dentibus 4 | 
‘‘profunde in palato sitis armata; peristoma 
“breviter expansum, continuum, in callo mar- 
“gines jungente tuberculo prominulo instruc- 
“tum.” 
Type. Helex Reyrei, Sowerby. 
Geog. distribution: Pacific coast (Ecuador). 
This singular little shell has very striking 
characters. It cannot be collocated in Poly- 
gyra or Systrophia. 
XV. Tetrodcntina, Ancey. ‘Testa sub- 
“elobosa, solida, cretacea, plerumque unifas- 
“ciata, umbilico sat parvo cylindrico proedita 
‘‘Anfractus 5-7 arcte convoluti, spiram subcon- 
“icam apice obtusam formantes, ultimus altus, 
“‘tumidus, rotundatus, antice non deflexus. 
| “Apertura minus obliqua intus dentibus 4 mu- 
“nita, scilicet: 2 in pariete duobusque in inter- 
“‘iore marginis basalis albo incrassati leviterque 
“‘expansiusculi.”’ 
Types. Helix Yantaiensis, tetrodon and 
Houaiensis. 
Geog. distribution: 
ho (North China). 
Loss. 
Valley of the Hoang- 
It is found fossil in the 
XVI. Rhyssotopsis, Ancey. ‘Testa similis 
“characteribus plerisque RKhysota, Albers, sed 
“multo minor typicis speciebus, fragilior, fusca 
“et spiraliter tenuiter striatula.”’ 
Type. Helix Haughtoni, Benson. 
Geog. distribution: Andaman Islands. 
XVII. Ophiospila, Ancey. ‘Testa affinis 
“gen. Solaropsidi, sed multo minor, cicatrice 
“semper destituta, haud angulata, plerumque 
tenuis, tenuissime  granulata, 
‘fascus interruptis exiguis signata et peristo- 
“mate sinuato, haud reflexo.vix ad columellam 
A Psadara differt testa 
‘‘minore, tenuius granulata, haud hirsuta, spira 
“convexiuscula et aperturee characteribus.”’ 
Types. Helix Kuhni, Pfeiffer; H. andicola 
Pfeiffer: H. catenifera, etc. 
Geog. distribution: Guyana. Columbia. 
To be Continued. 
