MOLLUSCA OF PORTO RICO. 
373 
(SIGMURETHRA.) 
Aulacopoda. 
Family ZONITID^E. 
Genus VITREA Fitzinger, 1833. 
Vitrea insecta von Martens. 
Hyalina insecta E. von Martens, Jahrb. d. Deutsch. mal. Ges., iv, 1877, p. 345, pi. xn, fig. 3. 
Caguana, near TJtuado, Porto Rico (Crosse). 
Bland reported Vitrea indentata from Porto Rico. Crosse states that this species is near to indentata, 
but perfectly distinct, and that it was probably the insecta that Bland mistook for indentata. 
Vitrea bryodes Shuttleworth. 
ZonH.es bryodes Shuttleworth, Piagn.neue Moll. Berner Mitth., 1834, p. 36. 
This species has never been figured. Its generic position is a little uncertain, as is that of the 
preceding species. It is reported from various localities in Porto Rico (Crosse). 
Genus ZONITOIDES Lehmann, 1862. 
Zonitoides minusculus Binney. 
Helix minuscula Binney, Bost. Journ. Nat, Hist., HI, p. 345, pi. XXII, fig. 4, 1843. 
Fajardo; Humacao, Porto Rico (Crosse). 
Widely distributed over the United States, parts of Mexico, and various West Indian islands. 
Genus GUPPYA Morch, 1867. 
Guppy a gundlachi Pfeiffer. 
Helix yandlachi Pfeiffer, Arch, fiir Naturg. I, 1840, p. 250. 
Pprto Rico, numerous localities; Vieques (Crosse) ; Santo Domingo; St. Thomas; Cuba; Nicaragua; 
Florida. 
(AGNATHOMORPHA. ) 
Family GLANDINIIPE. 
Genus GLANDINA Schumacher, 1817. 
Shell elongated with elevated, conical spire and lengthened body whorl, with the base usually 
attenuated; whorls but slightly rounded; aperture elongate, wider below; outer lip scarcely thickened; 
columella curved and inrolled, truncate at its base. 
Type, Glandina olivacea Schumacher. 
Glandina portoricensis Pfeiffer. 
Glandina portoricensis Pfeiffer, P. Z. S. 1848, p. 111. 
Achatina riisei Pfeiffer, Chemnitz, Conch. Cab., n. ed. , Achatina, pi. i.xvn, figs. 3, 4. 
Porto Rico, many localities (Crosse). 
Glandina terebraeformis Shuttleworth. 
Glandina terebrieformis Shuttleworth, Diagn. neue Moll. Berner Mittli., 1854, p. 52. 
Ceiba; Rio Blanco; Vega Baja, Porto Rico (Crosse); Santo Domingo. 
Glandina sulculosa Shuttleworth. 
Glandina sulculosa Shuttleworth, Diagn. neue Moll. Berner Mitth., 1854, p. 52. 
San .Tuan; Humacao; Utuado, Porto Rico (Crosse). 
Glandina interrupta Shuttleworth. 
Glandina interrupta Shuttleworth, Diagn. neue Moll. Berner Mitth., 1854, p. 51. 
Eastern part of Porto Rico (Crosse). 
