620 SUPPLEMENT. 
Guppya pittieri (p. 121). 
Guppya pittieri, Biolley, Mol. terr. y fluv. de Costa Rica, p. 9°. 
Guppya biolleyi (p. 121). 
Guppya biolleyi, Biolley, Mol. terr. y fluv. de Costa Rica, p. 9°. 
To the localities given, add :— 
Hab. N.E. Costa Rica: Sarapiqui, 200 metres (Biolley +). 
Guppya micans (p. 121). (Tab. XLIV. fig. 3.) 
To the localities given, add :— 
Hab. E. Costa Rica: Bruschik, Alta Tararia (Pilsbry, Sept. 1898). 
I refer to this species two Costa Rican specimens collected by H. Pittier at the 
above-mentioned locality, the larger one being here figured. They are very shining, 
and of a golden-yellow colour, distinctly perforated and rounded at the periphery, as 
in the figure given by Angas. 
[12. Guppya hopkinsi. 
Guppya hopkinsii, Dall, Proc. Acad. Phil. 1900, p. 97, t. 8. figg. 5, 6, and p. 105 (anatomy) *. 
Depressed, of reddish horn-colour, shining below, periphery rounded. 
Diam. 6, alt. 43 millim. 
Hab. Cocos Istanp: on leaves (Heller & Snodgrass, 1899 1). 
This is probably the Conulus sp. found by H. Pittier on the same island (¢/f. 
v. Martens, Sitzungsberichte naturf. Freunde zu Berlin, 1898, p. 156). The locality, 
which is about midway between the Isthmus of Panama and the Galapagos Is., can 
hardly be regarded as belonging to our region, still there is no harm in mentioning 
the species here. | 
PSEUDOHYALINA (p. 124). 
Pseudohyalina minuscula (p. 124). 
Pseudohyalina minuscula, Biolley, Mol. terr. y fluv. de Costa Rica, p. 8”. 
To the localities given, add :— 
Hab. Cenrrat Costa Rica: San José, 1161 metres, beneath dead leaves, and on the 
slope of the Volcan de Barba, 1500 metres (Biolley 28). 
S.W. Costa Rica: Rio Naranjo, 200 metres (Pitter). 
Pilsbry [Manual of Conchology, (2) ii. p. 202] says that it is also found in 
Venezuela. 
