MEGALOMASTOMA §. 1. 
135 
Subfam. IY. Pupinea. 
Pfr. Mon. Pneum. II. p. 78; III. p. 86. 
XXVI. Megalomastoma Guilding. 
Pfr . Mon. Pneum. I. p. 123; II. p. 78; III. p. 86. — 
Blanford in Ann. and Mag. nat. hist. 3d. ser. XIII. 1864. p. 
461. — Bland in Arner. journ. conch. II. 1866. p. 60. — 
Martens Ostas. Zool. II. 1867. p. 153. — Megaloma et Loma- 
stoma Woodw. — Megalommastoma Patel Catal. 1873. p. 17. 120. 
Conspectus specierum. 
A. Abnormes, apertura ovali (Haine- 
sia Pfr.) 1. Nr. 1 — 3. 
B. Normales, apertura subcirculari. 
a. Peristomate incrassato ( Farcimen 
Trosch.) ; 2. — 4—19. 
b. Peristomate subtenui, plerumque 
duplicato ( Megalomastoma ) 
1. occidentales §.3. — 20 — 21. 
2. orientates ( Coptocheilus Gould) §. 4. — 22 — 29. 
§. 1 . 
1. croceum (Cyclostoma) Sow. I. 125. II. 79. III. 86. — Cyclostoma 
Gooldianum Petit. — Farcimen croceum Gray. — Ins. Mauritius. 
2. bifasciatum (Cyclostoma) Sow. I. 126. II. 79. III. 86. — 
Guayaquil. 
3. ? IV!. arboreum (Dacrystoma) Crosse & Fischer, f 
„T. vix subrimata, pyramidato-elongata, tenuiter et sub- 
oblique costulato-striata, crassiuscula, solidula, subopaca, sub 
epidermide tenui stramineo-olivacea, pallide fulvida; spira 
elongata, apice rotundato; sutura impressa; anfr. l 1 /^ con- 
vexiusculi, primi 2 sublaeves, sordide albidi, ultimus vix ascen- 
dens, spira minor (8 : 11), infra peripheriam castaneo anguste 
