MEGALOMASTOMA §. 3. 
133 
Cyclosloma altum Sow. Thes. N. 173. p. 152. t. 28. f. 187. 
— — Chernn. ed. II. N. 131. p. 127. t. 15. f. 12—14. 
Megalomastoma altum Pfr. in Zeitschr. f. Mai. 1847. p. 109. Consp. 
N. 194. 
— — Gray Catal. Cycloph. p. 31. N. 2. 
Habitat in insula Negros Philippinarum (H. Cuming). 
15. 91. iectilabi'iiin Qotild. 228 
T. perforata, oblongo-turrita, solidula, subtilissime striata, 
opaca, fusca; spira turrita, apice obtusiuscula ; anfr. 7 convexi, 
ultimus infra penultimum subrecedens, basi rotundatus, non 
filosus; apertura obliqua, basi producta, ovali - subcircularis ; 
perist. duplex : internum expansum, adnatum, latere columellari 
subeffusum, externum breviter patens, ad anfr. penultimum 
breviter interruptum, superne et infra perforationem dilatatum. — 
Operc. ? — Long. 23, diam. 10 mill. Ap. c. perist. 9 mill, 
longa, medio 9 lata. (Coll. Nr. 94.) 
Cyclostoma sectilabrum Gould in Proc. Bost. Soc. I. 1843. p. 140. 
— — Gould in Journ. Bost. Soc. 1844. p. 459. t. 24. 
f. 10. * *) 
— — Chcmn. ed. II. N. 178. p. 164. t. 24. f. 17. 18 
(Ex Gould) et t. 47. f. 11. 12. 
Megalomastoma sectilabrum Pfr. in Zeitschr. f. Mai. 1847. p. 109. 
Consp. N. 195. 
Farcimen sectilabrum Gray Catal. Cycloph. p. 29. N. 3. 
Habitat Tavoy in Burmah Anglorum. 
16. 91. funiciilatuni Benson. 229 
T. breviter rimata, turrito-oblonga, tenuis, striata et irre- 
gulariter malleata, subpellucida , fusca; spira elongata, apice 
obtusiuscula; anfr. 7 convexiusculi , ultimus V 3 longitudinis 
apice obtusiusculo ; anfr. 7 — 8 rotundatis ; sutura distincta, tenui; apertura 
circulari ; labio subincrassato , reflexo - patente , duplici , margine externo 
magis, interno minus expanso, intus canali parva ad basin columellarem 
munito ; umbilico mediocri , extus carina obtusa marginato ; operculo cor- 
neo, tenui, multispirali. — Long. 1,0, lat. 0,3". (Sow. 1. c.) 
*) T. turrita, spira acuminata, arete umbilicata, brunnea; anfr. 8 sub- 
ventricosis , vix striatis , penultimo subgibbo ; apertura suborbiculari , intus 
rubescente; perist. duplici, incrassato, albo, prope angulum posticum canali 
parvo interrupto. — Long. 1"; diam. — Closely resembles C. altum 
Sow., but has the fissure across the peritreme on the opposit side. C. cro- 
ceum Sow. may be only a faded specimen of this shell. (Gould 1. c.) 
