MOLLUSCA, 623 
Helix suturalis (p. 136). 
Helix suturalis, Biolley, Mol. terr. y fluy. de Costa Rica, pid", 
To the localities given, add :— 
Hab. N.E. Cosra Rica: Puerto Viejo, 121 metres (Biolley®’). 
Helix sumichrasti (p. 137). 
Helix (Trichia) sumichrasti, Fischer & Crosse, Miss. Scient. Mex., Moll. ii. p. 664, t. 71. figg. 8, 8a’. 
Helix sargi (p. 137). 
Helix (Aglaia) sargi, Fischer & Crosse, Miss. Scient. Mex., Moll. ii. p. 664, t. 71. figg. 6, 6 a, b*. 
Helix macneili (p. 137). 
Helix macneili, Biolley, Mol. terr. y fluv. de Costa Rica, p- 10°. 
Epiphragmophora (Averellia) macneili, Pilsbry, in Tryon’s Manual of Conch. (2) ix. p. 197°. 
To the localities given, add :— 
Hab. [E. Costa Rica:| Tuis, 600 metres (Biolley 5). 
[S.W. Costa Rica:] Alto de Mano Tigre, 690 metres (Pittier). 
Pilsbry ° adopts a distinct subgenus (Averellia, Ancey) for this very peculiar species, 
leaving it, however, close to Trichodiscina. 
Subgen. PRatIcoLELa (p. 138). 
This division is placed by Pilsbry, in Tryon’s ‘Manual of Conchology,’ (2) ix. 
pp. Xxxili and 67, as a distinct genus in the tribe Protogona of the Helicide, wanting 
flagellum, dart, and mucous glands. 
Helix ampla (p. 138). 
Praticolella ampla, Pilsbry, Nautilus, x. p. 59 (1896) °. 
Helix (Patula) ampla, Fischer & Crosse, Miss. Scient. Mex., Moll. ii. p, 663, t. 71. figg. 8, 8a°. 
To the localities given, add :— 
Hab. [E. Mexico :| San Rafael, Jicaltepec (Cockerell*). 
14(a). Helix strebeliana. 
Praticolella strebeliana, Pilsbry, Proc. Acad. Phil. 1899, p. 394°. 
Near the preceding (H. ampla), rather depressed, pale corneous. 
Diam. 10°2-12, alt. 6-5—7°5 millim. 
Hab. N.E. Mexico: Diente, near Monterey, State of Nuevo Leon (Mr. & Mrs. Rhoads"). 
Helix berlandieriana, var. griseola (p. 140). 
Helix (?) (Praticola) griseola, Pilsbry, Proc. Acad. Phil. 1891, p. 313”. 
Praticolella griseola, Pilsbry, Nautilus, x. p. 59”. 
