HELICINIDZ. 23 
11. Honpuras. 
Helicina rhynchostoma, H. denticulata, H. sanguinea, H. dysoni, H. lirata, H. antoni, 
H, diaphana, H. exigua. 
12. SALVADOR. 
None recorded hitherto. 
18. Western NicaraGua, Pacific slope. 
None recorded hitherto. 
14, Easrern Nicaracva, valley of the great lake and Caribbean slope. 
Helicina amena, H. rostrata, H. denticulata, H. tenuis, H. dysoni. 
15. Costa Rica and the Stare or Panama, Pacific slope. 
Helicina ameena, var. 
16. Costa Rica, Caribbean slope. 
2 Helicina funcki, H. tenuis, H. flavida, var. beatrix, t H. lirata. 
The present state of our knowledge permits us to come to the following probable 
conclusions :— 
The regions drained into the Caribbean Sea are much richer in species than those of 
the Pacific slope, not only because they are also much more extensive, but also because 
they are more favoured by a moist climate. 
The more northern part of Mexico has few really peculiar species. 
Several species extend along the Caribbean side, from the State of Vera Cruz to 
Guatemala (Helicina fragilis, H. oweniana, Schasicheila pannucea); some even to 
Nicaragua and Costa Rica (Helicina amena, H. tenuis, H. flavida, H. lirata) ; Helicina 
dysoni from Belize to Nicaragua. 
Helicina punctisulcata is peculiar to the Western slope of Central Mexico. 
Helicina ghiesbreghti extends from Central Mexico (territory of the Laguna de 
Chapala) along the west coast (Chiapas?) to Guatemala, but does not seem to extend 
to the Caribbean side. 
On the contrary, Helicina amena, H. tenuis, H. lirata, and Schasicheila pannucea 
seem to be common both to the Caribbean and Pacific shores, chiefly within Guate- 
mala. 
Helicina rhynchostoma and H. funcki extend from Honduras and Costa Rica through 
the Isthmus of Panama to Colombia, H. lirata even from Vera Cruz to Venezuela. 
But no species is common to the continent of Mexico or Central America and the 
Caribbean islands (cf. H. flavida?). 
The genus Schasicheila is limited to Eastern Mexico and Guatemala; Proserpina, 
on the contrary, is common to Eastern Mexico, the Caribbean islands, and Venezuela, 
and may therefore yet be found in the more southern parts of Central America. 
