CYCLOTUS §. 3. 4. 
19 
ter et irregulariter rugatus, basi laevior, circa umbilicum an- 
gulatus; apertura obliqua, fere circularis, superne angulatim 
pioducta, intus fulvida, nitida ; perist. simplex, breviter adna- 
tum, superne productum, margine dextro vix expansiusculo, 
columellari subincrassato. — Operc. C. jugosi, anfractibus 
paulo angustioribus. — Diam. maj. 30, min. 24, alt. 15 mill 
Ap. 14 mill, longa, 12% lata. (Coll. Nr. 16.) 
Cyclostoma pallescens C. B. Adams Contr. p. 143. 
Cyclotus pallesccns Pfr, Mon. Pneum. p. 27. n. 18. 
— — Gray Cat. Phan. p. 14. 
— . “ (Aperostoma) //. et A. Adams Gen. II. p. 276. 
Habitat in insula Jamaica. 
* 
23. variaias £j # Ad. (Coll. 17. — Ch. ed. nov. 
p. 341. t 44. f. 7 — 9. — Gray Phan. p. 15. 
Aperostoma Ad. Gen. p. 276.) ....... Mon p. 27. 
24. Sow. (Ch. ed. nov. p. 325.— Gray 
Phan. p. 15. — Aperostoma Ad. Gen. p. 276.) . - 28. 
25. ? ©aiilifiEiHfg C. JB. Ad. f ( Gray Phan. p. 16. 
— Aperostoma Ad. Gen. p. 275.) _ - 29. 
26. pergaallidais C. M. Ad. f (Gray Phan. p. 16.-^ 
Aperostoma Ad. Gen. p. 276.) ....... - - 29. 
27. C. dctiieimis Pfr. 
T.^ umbilicata, depressa, solidula, subangulata, daucina 
vel albida ; spira parum elevata ; sutura simplex; anfr. 4% 
conyexi, sensim accrescentes, superiores spiraliter striati, ulti- 
mus rugosus, carina rnediocri, antice evanescente munitus ; 
umbilicus conicus, % diametri paulo superans ; apertura parum 
obliqua, subcircularis ; perist. simplex, rectum, ad anfractum 
penultimum breviter interruptum. — Operc. anguste et obso- 
lete spiratum. — Diam. maj. 12, min. 10, alt. 6 mill. Ap. 
diam. 5 mill. (Mus. Cuming.) 
Cyclostoma daucinum (Cyclotus) Pfr. in Proc. Zool. Soc. 1856. p. 337. 
Habitat in insulis Salomonis. 
Obs. Differt a C. Recluziano, cui affinis, anfractibus lentius accres- 
centibus, umbilico angustiore, sculptura, etc. 
S. 4. 
28. stramitaesis Reeve (Coll. 18. — Gray Phan. 
p. 9. — Aperostoma Ad. Gen. p. 276.) .... Mon. p. 20. 
29. Dysoni Pfr. (Coll. 19. — Cyclost. Dysoni Pfr. 
Proc. 1851. p. 243. — - Ch. ed. nov. p. 259. — Cy- 
clophorus ? Dysoni Pfr. Mon. Pneum. n. 80. — 
Gray Phan. p. 69. — Ad. Gen. p. 280. — Oper- 
culum typicum ! — Var. umbilico paulo latiore : Chiapa 
reipublicae mexicanae teste Ghiesbreght.) .... - - 98, 
2 * 
