CYCLOPHORUS §. 5. 
81 
columellari in laminam appressam expanso, basali supcrnc in 
tuberculum prominens desinente. — Operc. tenuissimum, lu- 
tescenti-corneum, arctispirum. — Diam. maj. 25, min. 21, alt. 
16 mill. Ap. intus 10 mill, longa. (Coll. Nr. 51.) 
Trochus turbo Chemn. Concli. Cab. IX P. II p. 53. t 122. f. 1059. *) 
Helix turbo Grnel. Syst p. 3642. N. 232. 
Cyclostoma turbo Sow. Thes. N. 75. p. 116. t. 25 f. 102. 103.**) 
— — Chemn. ed. II. N 148. p. 140. t. 19. f. 4. 5. 
— — Jay Catal Ed. 1850. p. 260. N. 60 L4. 
— maculosa Jay Catal. Ed. 1839. p 122. t. 7 f. 9. 10. ***) 
Cyclophorus turbo Pfr. in Zeitschr. f. Mai. 1847. p 108. Consp. N. 111. 
— — Gray Catal. Cycloph. p. 20. N. 21. 
Habitat Tranquebar et Coromandel (Chemnitz), Sumatra (So- 
werby); ins. Nicobar. (Morch.) 
17. ©•? ictericus Sowerby. 139 
T. subobtecte umbilicata, globoso-conica, solida, spiraliter 
et confertim lirata, subunicolor fulvescenti-flava ; spira conica, 
apice subtruncata; anfr. 5 convexiusculi , ultimus spiram ae- 
quans, basi profundius sulcatus; apertura subobliqua, ovalis, 
rotundata, intus concolor; perist. subincrassatum , expansum, 
marginibus callo lunatim exciso junctis, columellari superne 
in laminam fornicatam , reflexam expanso. — Operc. ? — 
Diam. maj. 22, min. 167 2 , alt. 18 mill. Ap. 14 mill, longa, 
12 lata. (Mus. Cuming.) 
Cyclosioma ictericurn Sow. Thes. N. 113. p. 131. t 31. f. 268. 269. f) 
— — Chemn . ed. II. N. 150. p. 142. t. 19. f. 8. 9. 
*) T. trochiformi, ex luteo et rufo variegata, subperforata, ore lunato 
seu rotundo ; anfr. 6. (Chemn. 1. c. ) 
**) T. subglobosa, spira conoidali, anfr. 5 planulatis, pallidis, brunneo- 
variegatis ; sutura inconspicua ; apertura fere circulari , latere columellari 
subangulato; columella rectiuscula, subobliqua; peritremate reflexo , rotun- 
dato, postice marginato , infra in angulum desinente ; umbilico clauso , cal- 
loso; operculo corneo, tenui, spirali. (Sow. 1. c.) 
***) Remarkable for the angularity of the base of the body whorl, and 
somewhat resembles the base of a Trochus. The umbilicus is almost clos- 
ed. The shell has a polished appearance and is beautifully mottled with 
reddish brown blotches. (Jay 1. c.) 
f) T. globoso-conica, crassiuscula, fulvescente, spira acuminata, apice 
dccollato ; anfr. 4 rotundatis , spiraliter sulcatis ; apertura circulari, peritre- 
mate incrassato , reflexo , supra umbilicum parvum crasso , extenso , umbili- 
cum fere tegente, postice subacuminato ; sulcis spiralibus umbilici major ib us. 
(Sow. 1. c.) 
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