868 rROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxi. 



This family has not been sufficiently worked up to offer as yet any 

 systematic arrangement of the genera.' 



37. ARGKIA Dana. 



ANALYTICAL KEY TO THE SPECIES OF ARGEIA. 



a. Head transverse. All the tlioracif branchial appendages present. All the abdom- 

 inal appendages present 88. Argeia pugcttensis Dana. 



a'. Head bilobate. Thoracic branchial appendages apparently absent in some of 

 anterior segments. Last three pairs of abdominal appendages wanting. 



89. Argeia depauperata Stimi^son. 



88. ARGEIA PUGETTENSIS Dana. 



Argeia pugettenais Dana, U. S. Expl. Exp. Crust., II, p. 804, pi. liii, fig. 7. — 

 Stimpson, Bos. Journ. Nat. Hist., VI, 1857, p. 71. 



Habitat. — Puget Sound on Crangon munita. 



89. ARGEIA DEPAUPERATA Stimpson. 



Argeia depauperata Stimpson, Bos. Journ. Nat. Hist., VI, 1857, p. 71. 

 Habitat. — San Francisco Bay on Crangon franciscorum. 



38. PHYLLODURUS Stimpson 



90. PHYLLODURUS ABDOMINALIS Stimpson. 



Phyllodurus ahdominalis Stimpson, Bos. Journ. Nat. Hist., VI, 1857, p. 71. — LocK- 

 INGTON, Proc. Cal. Acad. Sci., VII, 1876, Pt. 1, p. 57. 



Habitat. — Puget Sound; Tomales Bay, California; "on the common 

 VpogebiaJ^ 



39. BOPYROIDES Stimpson. 



91. BOPYROIDES ACUTIMARGINATUS Stimpson. 



Bopyroides acutimarginatua Stimpson, Proc. Acad. Nat. Sci. Phila., XVI, 1864, 

 p. 156. 



Habitat— Pviget Sound, on Spirontocaris brevirostris. 



40. PSEUDIONE Kossmann. 



analytical key to the species of PSEUDIONE. 



a. Antenna- five-jointed. First pair of maxilhe absent. In male, eyes present; 

 maxilljB wanting; last segment of abdomen cordate in form, being narrow 

 anteriorly and having its hinder margin notched 



92. Pseudione giardi Caiman. 

 a'. Antenna' fonr-jointed. Maxilhe normal, present. In male, eyes wanting; max- 

 illaj normal, present ; last segment of abdomen triangular and entire. 



93. Pseudione galacanihce Hansen. 



1 See Hansen, Bull. Mus. Comp. ZooL, Harvard College, XXXI (1897), p. 112. 



