324 Geographical Distribution of Crustacea. 
2. TORRID ZONE SECTION, 
Species inthe Species in the Temper- 
‘orrid zone. ate and Frigid zones, 
Astacidea, 
Scyllaride, except Arctus, matt 2 
Palinuride, G. Panulirus, . 12 1 
Caridea, 
tyine, ; : 8 1 
Pglemonide. 
Alpheine, G. Alpheus, . 81 vi 
Palemonine, G, Pontonia, 4 2 
dipus, 3 0 
Harpilius, 1 0 
Anchistia, 3 0 
Palemonella, 2 0 
Pal von 82 19 (1 frigid). 
Hymenocera, 1 0 
Oplophorine, P ; 3 1 
Peneidea, ; . «19 12 
_ XXII. Considering the Scyllaride and Palinuride as the Ma- 
croura highest in grade, this division of the Podophthalmia ap- 
pears at first.to have its superior developments in the tropics. 
The Astacidee, the remaining family in the tribe Astacidea, !§ 
confined almost wholly to the colder waters, and the species are 
numerous. 
Among the Caridea, the Crangonide certainly have the prece- 
dence. ‘I'he fact that the first pair of legs have perfect hands, 
while the other legs are vergiform, shows a relation to the Brach- 
