NO. 1518. PHILIPPINE SNAILS OF GENUS VIVfPARA—BARTSCH. 141 



wavy spiral lirations. The crossing of these two elements lend the 

 shell a tinely reticulated sculpture. Aperture, moderately larg-e, oval, 

 white, with a brownish tinge within; outer lip, thin; columella very 

 slender, somewhat expanded at base and slightly reflected; parietal 

 wall covered with a short, thin, semitransparent callus. Operculum 

 reddish orange, with but slightly depressed eccentric nucleus and 

 many lines of growth. 



The type and 136 specimens, Cat. No. 19297s, U.8.N.M., were col- 

 lected at Lake Buluan, Mindanao, Philippine Islands, by Maj. Edgar 

 A. Mearns. The type has six and one-half whorls and measures: 

 Altitude, 30.8 mm.; greater diameter, 23.3 mm.; lesser diameter, 28.8 

 mm. ; aperture (from the posterior angle to the middle of the base), 

 15.2 mm.; diameter (at right angles to the last from the middle of the 

 outer lip), 12 mm. 



This entire lot is remarkably uniform in shape and sculpture, differ- 

 ing only in color, in which there is a variation from light olive green 

 to reddish brown. 



VIVIPARA CARINATA Reeve. 

 Plate XI, tig. 14. 

 Paludina carinata Reeve, Conch. Icon., XIV, 1868, no. 53, tig. 53. 



The name of the present shell is somewhat misleading, since the 

 carination is restricted to the periphery of the early whorls. In the 

 adult turns it is quite obsolete. 



The shell is conic and of olive-green color, with an occasional nar- 

 row, dark, longitudinal stripe. The earh^ whorls are eroded in all of 

 our specimens. The later ones are evenly rounded between the sutures, 

 marked ))y lines of growth and exceedingly tine, closely spaced, obso- 

 lete, spiral lirations. Sutures strongly impressed. Periphery of the 

 last turn obsoletely angulated. Base well rounded, with a narrow 

 um})ilicus, which is almost completely covered by the somewhat 

 reflected columella, marked as the spire. Aperture moderately large, 

 bluish white within, outer lip thin. Columella slender, concave, and 

 somewhat reflected; parietal wall covered by a thin callus. Oper- 

 culum reddish, with slightly depressed eccentric nucleus and many 

 lines of growth. The specimen described and figured, Cat. No. 103666, 

 U.S.N.M., has the apex badly worn. The six remaining turns meas- 

 ure: Altitude, 31.8 mm.; greater diameter, 25.2 mm.; lesser diame- 

 ter, 23.1 nmi.; aperture, altitude (from the posterior angle to the 

 middle of the base), 18,6 nun.; diameter (at right angles to the last 

 from the middle of the outer lip), 14 mm. Another specimen, belong- 

 ing to the same lot, with worn nucleus and Ave whorls remaining, 

 measures: Altitude, 22 mm.; greater diameter, 18 mm.; lesser diame- 

 ter, 15 mm. These two individuals are marked Philippine Islands, 

 without nearer designation of locality. Three additional specimens, 

 Cat. No. 17995, U.S.N.M., w^ere collected in Luzon, Philippine Islands, 

 by Hungerford. 



