1058 MALAYSIAN LAND AND FRESHWATER MOLLUSCA, 



S. GRACILIS, Lea, Proc. Amer. Phil. Soc. 1841, II. p. 31 ; Pfr. 

 Mon. Hel. II. p. 518. 

 Java {?). 



S. MiNUTA, Mouss. Zolling. in Peterm. Geog. Mittheil. 1864, 

 H. VIII. p. 303 (Nomen) ; Mart. Ostas. Zool. II. p. 388 ; Pfr. 

 Mon. Hel. V. p. 464. 



Bali. 



Family CYCLOPHORID^. 



The Cyclophoridee have helioiform shells with a circular 

 opening, and covered with a thick periostraca ; operculum cal- 

 careous or horny, spiral with numerous whorls. 



Animal with long, slender, pointed tentacles, foot broadly 

 expanded, not grooved. 



21. CvcLOTUS, Guilding. 



Conchological Papers, by L. Guilding. See Swainson, " Shells 

 and Shell- fish," pp. 182 and 336. 



Shell nearly discoid ; pillar none ; spire scarcely raised ; lip 

 thickened; widely umbilicate; operculum shelly; whorls numerous 

 with raised margins. 44 species, mostly tropical. 



Cyclotus hungerfordianus, 0. von Moll. Jour. As. Soc. 

 Beng. LV. 1886, p. 306. 



Bukit Pondok, Perak. 



C. (?) DiscoiDEUS, Sowerby = Cyclostoma discoideum, Sow. Thes. 

 N. 60, p. Ill, pi 25, figs. 87-88; Chemn. 2nd edit. Cycl. No. 153, 

 p. 144, pi. 20, figs. 1-3 ; Mouss. Jav. Moll. p. 50, pi. 20, fig. 10 = 

 Aperostoma discoideum, Pfr. in Zeitschi-. f. Malak. 1847, p. 104:= 

 Cyclotus discoideus, Gray, Catal. Cycloph. p. 8, No. 11 ; Pfr. Consp. 

 No. 36 ; Mon. Pneumon. Viv. p. 36. 



Malang, Java. 



C OPALiNUS, Mouss. ^ Cyclostoma opalinum, Mouss. Jav. Moll. 

 p. 51, ph 5, fig. 12= Cyclotus opalinus, Pfr. Consp. No. 37; 

 Mon. Pneumon. p. 36. 



Malang, Java. 



