RHODEA. 253 
XXIV. Rhodea Hl, & A, Adams. 
Testa imperforata, dextrorsa aut sinistrorsa, cylindracea, 
eracilis, multispira; anfractus ultimus acute carinatus, subtus 
excavatus; apertura trigona vel subtetragona; columella incras- 
sata, acute callosa, recte descendens, basi subtruncata; peristoma 
simplex, subacutum. 
Rhodea (subgenus Columnae) H. (Y A. Adams Gen. rec. moll. 
p. 135. 
— — — Binn. Y Bland North— Amer. landsh. 
nz»90: 
— (genus) Mousson in Malak. Bl. XXI. 1873. p. 16. 
— (genus Pupaceorum) Püíel Catal. 1873. p. 15. 102. 
— Pfr. Novit. conch. IV. p. 119. 
—  . Dohrn in Jahrb. malak. Ges. II. 1875. p. 308. 
— (Crosse in Journ. Conch. XXIV. 1876. p. 5.*) 
Subgenus pro Achatina? californica Pfr. propositum cogni- 
tione specierum plurium exacte typicarum generice nunc bene 
stabilitum videtur, Stenogyrae potius quam Columnae affinitate 
naturali conjunctum. 
Species: 
1. Eh. gigantea Mousson. 
«T. imperforata, turrito-cylindracea, bacilliformis, oblique 
confertim et aeque plicato-striata, nitore destituta, epidermide 
fugaci corneogrisea vestita. Spira multigyrata, lente attenuata; 
summo obtusulo, nucleolo hyalino denudato; sutura lineari. 
Anfr. 14, lentissime accrescentes, primi niüdi convexiusculi, 
sutura impressa discreti; sequentes plani, sutura lineari vel 
filomarginata separati; ultimus concave contractus, carina dor- 
*) » T. pone columellam imperforata, sed ante, in loco axis longitu- 
dinalis, profunde umbilicata, cylindraceo-turrita, parum crassa, subtrans- 
lucida, oblique striata, sub epidermide tenui, plus minusve decidua, 
corneo-lutescente, albida; spira elongata, polygyrata, apice rotundato, ob- 
tusulo; sutura in anfractibus superis linearis, in sequentibus magis ac 
magis impressa, mox funiculiformis; anfractus numerosi, primi convexius- 
culi, sequentes planati, ultimus spira multo minor, carina valida, pro- 
minula cireumdatus, infra carinam excavatus; apertura subobliqua, trian- 
gularis; peristoma (in adultis speciminibus) continuum, marginibus junctis, 
parietali appresso, columellari arcuato, dilatato, basin attingente, trunca- 
turam simulante, cum basali angulum formante, supra valide torto, spiraliter 
cireumvoluto, basali subhorizontali, alterum angulum cum externo for- 
mante.» (Cr.) 
