THE NAUTILUS. 
INDEX TO CONCHOLOGISTS’ EXCHANGE. 
47 
Vv 
Mya arenaria Linné, . : : : : II, 4 
Mytilopsis leacopheata Conr., , attached to Unios, . I, 27 
Natica Fordiana Simpson, n. sp.; Florida, II, 51 
Nevra pellucida Stimp., : II, 61 
Nesobia Ancey, n. subg., type Bulimus Helence Q. et 
G.; St. Helena, 10 ee) 
Oligospira Ancey, n. subg., types H. Waltoni Rve. ; ; H. 
Skinneri Rve. ; Ceylon, Il, 22 
Ophiosphila Ancey, n. subg., types Helix Kuhni Pfr. ; 
H. andicola Pfr. ; H. catenifera, ete., I, 64 
Pandora trilineata Say, IT, 62 
Parmacella valenciennii Webb & Van Ben., var ‘pune. 
tulata Cockerell; var. maculata Cockerell ; and 
var. olivacea Cockerell (new varieties),. II, 68 
Patula strigosa Gld., var. Bruneri Ancey, II, 64 
Periploma Leana Conrad, ‘ TG ae: 
Petricola pholadiformis eam, : : ; : TitOL 
Pholas truncata Say, . : ‘ ‘ ; ; I, Go hig 
Pholas costata Linn., . LS: 
Physa solida Phil. , syn. Oigk ‘heterostropha Say, 5 : I, 20 
Physa (-Paludina, ) scalaris Jay a Planorbis (Heli- 
soma), : dS (SS Las 
Physa gyrina $ Say ; ‘Ee. heterostropha Say, : : Reel 
Pilsbrya Ancey, n. subg., in nee of Poecilostola An- 
cey, preoccupied, I, 54 
Pisidium compressum Prime ; P. variabile Prime, . : tl 49 
Pisidium zquilaterale Prime, II, 50 
Planorbis dilatatus Gld., in England, I, 63 
Planorbis lens Lea, : j TL, 63,76 
Planorbis havanensis Pfr. ; Pp tumidus, 5 ; 20. Te ot 
Planorbis exacutus Say, : ; ; I, 76 
Planorbis deflectus Say ; P. dilatatus Gld., iS tie 
Planorbis hirsutus Gld., f eas 
Planorbis parvus Say ; P. Jenksii H. F. Carpenter 
(n. sp.), Tio 
Planorbis inabilicadellus Cockerell new name for P. um- 
bilicatus Taylor, non Miller, IT, 68 
Planorbis trivolvis Say, v 111 
; dis 
Planorbis (Helisoma) scalaris Jay (Physa scalaris Jay), 
Pleurocera subulare Lea, ‘ : : 
II, 81, 94 
