MOLLUSCA OF PORTO RICO. 
375 
Opeas micrus d’Orbigny. 
Helix micro, d’Orbigny, Mug. do Zool., 1835, p. 9, No. 49; Voy. Am. Mur., p. 262, pi. xli 6 is, figs. 18,19. 
Eastern Porto Rico; Vieques (Crosse); Cuba; Jamaica; Barbados; St. John; St. Thomas; Florida; 
South Carolina; Bolivian Andes; Rio Janeiro. 
Opeas marg'aritaceus Shuttleworth. 
Stenogyra (Opeas) margaritacea Shuttleworth, Diagn. Neue Moll. Berner Mitth., 1854, p. 47 (unfigured). 
Rio Blanca in the Sierra de Luquillo, Porto Rico (Crosse). 
Opeas alabastrinus Shuttleworth. 
Stenogyra (Opeas) alabastrina Shuttleworth, Diagn. Neue Moll. Berner Mitth., 1854, p. 47 (unfigured). 
San Juan, Porto Rico (Crosse). 
Opeas g-ompharium Shuttleworth. 
Stenogyra (Opeas) gompharium Shuttleworth, Diagn. Neue Moll. Berner Mitth., 1854, p. 47 (unfigured). 
San Juan, Porto Rico (Crosse). 
Opeas goodallii Miller. 
Helix goodallii Miller, Ann. of Phil., vil, p. 381, 1822. 
Bulimus goodallii Reeve, Conch. Icon., pi. lxxxiv, fig. 621, 1849. 
Various localities in Porto Rico (Crosse). 
Genus SUBULINA Beck, 1837. 
Shell diaphanous, elongated, subcylindrical, with obtuse summit; whorls numerous; aperture 
oval; columella twisted, subarcuate and truncated below. 
Type, Subulina sulcata Gray. 
Subulina octona Bruguiere. 
Bulimus octona Bruguiere, Enc. M6th., I, p. 325, No. 47, 1789; Chemnitz, Conch. Cab., IX, p. 90, pi. cxxxvi, fig. 1264. 
This common and widely distributed species has from 8 to 9 well-rounded whorls, having delicate 
striae, which are more strongly developed in the deep suture, where they often form faint denticulations. 
When fresh the shell is horn colored and shining. 
Caguas; under rocks in pastures, Bayamon; Ensenada Honda, Culebra; also West Indies generally, 
Mexico, and Central and South America. 
This with other Stenogyridx has no doubt been carried about the world on banana plants. 
Subulina acicularis Shuttleworth. 
Stenogyra (Subulina) acicularis Shuttleworth, Diagn. neue Moll. Berner Mitth., 1854, p. 49. 
Fajardo, Porto Rico (Crosse). 
Genus SPIRAXIS C. B. Adams, 1850. 
Spiraxis paludinoides d’Orbigny. 
Achatina paludinoides d’Orbigny, Moll. Cubana, i, p. 171, pi. xi, figs. 13-15, 1841. 
Aguadilla, Porto Rico (Crosse); Cuba; Jamaica. 
Genus PSETJDOBALEA Shuttleworth, 1854. 
Pseudobalea dominicensis Pfeiffer. 
Balea dominicensis Pfeiffer, P. Z. S., 1851, p. 140; Mon. Hel. Viv., iv, p. 454 (unfigured). 
Porto Rico, many localities (Crosse); Haiti; Cuba, at Bayamon (Gundlach). 
Family CLAUSIUID^. 
Genus CLATJSILIA Draparnaud, 1805. 
Shell elongated, many whorled, generally reversed; aperture oval or pear shaped, with a sinus 
above; peristome with a continuous border; columella oblique, furnished with lamella. The aperture 
is provided with a movable, shelly plate. 
Type, Clausilia plicatula Draparnaud. 
