370 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Subfamily PLANORBINH2. 
Genus PLANORBIS Geofifroy, 1767. 
Shell discoidal, biconcave, with the whorls visible on both sides; aperture small, rounded, 
oblique; peristome simple, generally thin; columella wanting. Jaw with three segments; foot straight, 
obtuse in front and behind. 
Type, P. corneus Linnteus. 
Planorbis guadaloupensis Sowerby. Plate 53, figs. 11, 12. 
Planorbis guadaloupensis Sowerby, Gen., iv, p. 2 (no pagination), pi. n (plates not numbered), fig. 2, 1821. 
Shell large, compressed, with six slowly increasing whorls, which are rounded on both sides and 
have very delicate incremental and revolving sculpture only visible under a glass; shining, ashy or 
horn-colored; aperture rounded, thin but slightly oblique; parietal callus distinct and well advanced 
on the penultimate whorl. 
Greater diameter, 25; lesser, 21; height, 7 mm. 
Rio Caguitas, Caguas, Porto Rico; several living specimens; also Santo Domingo; Guadaioupe. 
Planorbis tumidus Pfeiffer. 
Planorbis tumidus Pfeiffer, Weigm. Arch., I, p. 354, 1839. 
Planorbis caribseus d’Orbigny, Moll. Cuba, I, p.193, pl.xm.figs. 17, 19, 1842. 
Porto Rico and Vieques (Crosse); Havana, Cuba; Mexico; southwestern United States; Florida. 
Planorbis riisei Dunker. 
Planorbis riisei Dunker A Clessiu, Conch. Cab., Neue Ausg., Planorbis, p. 110, pi. xvn, fig. 7, 1886. 
Porto Rico (Crosse); Jamaica. 
Planorbis refulgens Dunker. 
Planorbis refulgens Dunker, P. Z. S., 1853, p. 54. 
Planorbis refulgens Dunker <fc Clessin, Chemnitz, Neue Ausg., p. 106, pi. xvm, fig. 10, 1886. 
Porto Rico (Crosse); Santo Domingo; Jamaica. 
Planorbis haldemani C. B. Adams. 
Planorbis haldemani C. B. Adams, Cont. to Conch., p. 43, 1849. 
Humacao; Luquillo; Rio Blanco, Porto Rico (Crosse); Jamaica. 
Planorbis schrammi Crosse. 
Planorbis schrammi Crosse, Journ. de Conchyl, xii, p. 153, pi. vn, fig. 2, 1864. 
Rio Anasco; Porto Rico (Crosse); Guadaioupe. 
Planorbis lucidus Pfeiffer. 
Planorbis lucidus Pfeiffer, Weigm. Arch., I, p. 354, 1839. 
Humacao; Luquillo, Porto Rico (Crosse); Cuba; Jamaica; Guadaioupe. 
Planorbis macnabianus C. B. Adams. 
Planorbis macnabianus C. B. Adams, Cont. to Conch., p. 43, 1849. 
Near San Juan, Porto Rico (Crosse); Jamaica. 
Planorbis circumlineatus Shuttleworth. 
Planorbis circumlineatus Shuttleworth, Diagn. Neue Moll. Berner Mitth. , 1854, p. 96. 
Near Humacao; Rio Blanco, Porto Rico (Crosse); Santo Domingo; St. Thomas. 
Genus PLANORBULA Haldeman, 1842. 
Planorbula albicans Pfeiffer. 
Planorbis albicans Pfeiffer, Weigm. Arch., i, p. 354, 1839. 
Porto Rico (Crosse); St. Thomas; Cuba. 
