60 
iimbilico  latiore,  anfractibus  convexionbus 
minus  involutis  aliisque  notis  bene  distin- 
guendus. 
Patria  ignota. 
13.  PI.  stramineus  DUNKER. 
PI.  tenuistriata,  nítida,  parum  diaphana, 
straminea,  subcornea,  supra  plano-concava, 
medio  impressa,  infra  umbilicata  ;  anfractibus 
quatuor  subrotundis  ;  apertura  dilatata,  fere 
rotunda.  Diam.  maximus  6"  fere,  alt.  2”. 
Pabia  America  australis. -Cumming. 
E.  VON  MARTENS,  Die  Binnenmollus* 
ken  Venezuela's -p.  198. 
14.  Planorbis  pronus,  n.  sp. 
Testa  subinflata,  solidula,  striata,  lineis 
spiralibus  imprests  nonnullis  exarata,  supra 
profunde  umbilicata,  infra  mediocriter  exca¬ 
vata,  anfr.  3  lh,  rapide  crescentes,  rotundati, 
sutura  profunda  discreti,  ultimus  infra  infla¬ 
tus  ad  excavationem  basalem  subangulatus, 
prope  aperturam  valde  descendens  ;  apertura 
diagonalis,  subtriangularis,  margine  supero 
subhorizontali,  leviter  carenato,  margine  infero 
stricto,  recedenti,  columellari  perpendiculari, 
subdilatato,  paries  aperturalis  callo  albido 
tectus. 
Diam.  maj.  10,  mim.  8,  alt.  5,  apert.  alt. 
obliq.  5  */2,  diam.  4  millim. 
Valenciasee. 
E.  V.  MARTENS,  loco  dt 
