PILSBRY: NON-MARINE MOLLUSCA OF PATAGONIA. 603 



south of the Equator, compiled in the course of work on Patagonian forms, 

 is here given for the convenience of those who have occasion to study the 

 group. 



LIST OF SOUTH AMERICAN 



SPH^ERIUM ^EQUATORIALE Clessin, Malakozoologische Blatter, n. F., I, 



1879, p. 176, Taf. ii, figs. 4-6. 



Rio Pedro, Val de Chillo, Ecuador. Length 9, alt. 6, diam. 3.5 mm. 

 Referred by Clessin to the group Corneola. 

 MUSCULIUM ARGENTINUM (d'Orbigny). See below. 

 MUSCULIUM PATAGONICUM Pils. See below. 



EUPERA BAHIENSIS (Spix), Testacea Brasil., 1827, p. 32, pi. 25, figs. 5, 6. 

 Sphcerinni bahiense Spix, Prime, Monograph of American Corbi- 

 culidae, 1865, p. 53, fig. 52. 

 Bahia, Brazil. 



EUPERA MODIOLIFORMIS (Anton). Sphcerium modioliforme Anton, Prime, 

 Monograph American Corbiculidae, 1865, p. 54. Pisidiiim moquini- 

 anum Bgt., 1855. Pisiditim diaphanum Hald., 1841. 

 Venezuela, Brazil. 

 EUPERA TUMIDA (Clessin). Limosina tumida Clessin, Syst. Conchylien 



Cabinet, Cycladeen, p. 246, pi. 46, figs. 5-8. 

 Bahia, Brazil. 

 PISIDIUM MAGELLANICUM (Dall). Corneocyclas magellanicus Ball, Bull. 



Mus. Comp. Zool., vol. 43, October, 1908, p. 411. 

 Magellan Straits, in 61 fathoms ; Rio Chico to base of the Andes. 

 PISIDIUM OBSERVATIONS Pils. See below. 

 PISIDIUM PATAGONICUM Pils. See below. 

 PISIDIUM STERKIANUM Pils., Proc. Acad. Nat. Sci. Phila., 1897, P- 2 9 ! > 



pi. 6, figs. 1-4. 



Montevideo, Uruguay. Length 6, alt. 5, diam. 3.8 mm. 

 PISIDIUM DORBIGNYI Clessin, Conchylien Cabinet von Martini und 

 Chemnitz, 2te Aufl., Cycladeen, 1879?, p. 62 (new name for Cyclas 

 pulchella d'Orbigny, Voy. dans 1'Amer. Merid., Moll., p. 568, pi. 83, 

 f. 8-10, not of Jenyns). 

 Maldonado, Uruguay. Length 3 mm. 



PISIDIUM VILE Pilsbry, Proc. Acad. Nat. Sci. Phila., 1897, p. 292, pi. 6, 

 figs. 17-20. 



