12 Geographical Distribution of Crustacea. 
the food in part of certain species of whale. Such immense 
shoals we did not meet with, within the tropics. 
Among the Daphnioidea, the genera Daphnella, Penilia, tee 
odaphnia, and Lynceus were observed by us in the Torrid z 
Of the Cyproids, Cypridinia, Conchecia, and Halotenie. ae 
oceanic forms, and mainly ofthe tropical oceans. 
The Caligoids spread over both zones. ——: and me 
theirus reach from the eactegal to the frigid seas; Nogagus, 
darus, and Dinematura are represented in both the Torrid a 
Temperate zones. 
GENERAL REMARKS AND RECAPITULATION. 
We continue by presenting a few general deductions from 
the tables, and a recapitulation of some principles. 
A survey of all the great divisions of Crustacea, shows us that 
exclusive of the er they are distributed, according 
to present knowledge, as follows: 
a. Torrid zone. 6. Temperate zone. c. Frigid zone. 
Brachyura,  . ‘ 257 (34 a) ns (5 5) 
Anomoura,  . 125 110 (15 a) tas 
ea... 5 Se 125 (16 a) 2 (2 2) 
Anomobranchiata, . 82 
Isopoda, . : ° 56 ' 208 (1 a) Ks (3 5) 
Anisopoda, . 8 
Amphipoda, . é 82 157 83 (4 5) 
Total, 1036 924 (75 a) 159 (144) 
Taking the sum of the Frigid and Temperate zone species 
(subtracting the fourteen common to the two) we have 1036 s 
cies in the torrid regions to 1069 in the extra-torrid, seventy-five 
of which are common to the two. This showsa nearly equal dis- 
tribution between the zones. But excluding the Brachyura, the 
numbers become 501 to 811, giving a preponderance of more 
than one-half to the Temperate zone.* 
* Adding to the numbers above, the species which have been maonieintty 3 left out 
uncertain 
locality, amounting to one hundred and eis in 4 cp also 
the Entomostraca, , as follows :— 
Brachyura, : is m - f - 8380 
Anomoura, . ‘ s ‘. : x 262 
Macroura, ; F ‘ : + 9F 
——1389 
ne gepaaaags Oyen, Sanne, Arughioniem) Ch 115 
