350 
Dr. Leach’s Arrangement of the Crustacea, <^c. 
lato. Palpi pediformes 3-articulati, articulo medio longiore, 
primo brevissimo. 
Ad foemincB abdominis basin est uterus externus e membranis duobus 
concavis valvuliformibus efformatus, quo,puMi nuper ex ovo exclusi 
tiivunt, crescunf. 
* Cauda lamelld intermedia emanxinatu. 
O 
Spec. 1. Mysis spinulosus. 
M. cauda lamella, intermedia externe spinulosa apice acut^ emar- 
ginata: lamellis exterioribus acuminatis latissime ciliatis. 
Praunus flexuosus. Leach, Edin. Encycl. vii. 401. 
Habitat in mari Scotico apud the I'rith of Forth. 
Spec. 2. Mysis Fabricii. 
M. caud4 lamella intermedia apice obtush emarginatd: lamellis 
exterioribus apice rotundatis. 
Habitat in mari Groenlandico. 
Cauda lamella intermedid integrd. 
Spec. 3. Mysis integer. 
Praunus integer. Leach, Edin. Encycl. vii. 401. 
Habitat apud Loch Ranza in Arran insul5, frequentissime. 
Length one-third of an inch. Colour pellucid cinereous spotted 
with black and reddish-brown. Ejes black. Females more abun- 
dant than the males. 
At low tide near Loch Ranza the pools were full of this spe- 
cies, swimming with its head uppermost and its eyes spread ; 
making a most grotesque appearance. 
Divisio 
