A, E. Verrill on new American Phyllopod Crustacea. 249 
and third joints from outer edge of first articulation to the tip 
2°48 ; greatest breadth ‘86; breadth at-last articulation “72 ; 
length of last joint 1:05 ; length of last joint of abdomen, ex- 
clusive of appendages, 1°00; its breadth 31; length of preced- 
ing joint ‘42 ; its breadth °37; length of terminal appendages 
‘21; breadth 096 ; length of longest sete 70. 
ear New Haven, in tubs of water from salt marsh. 
Artemia Monica Verrill, sp. nov. 
