804 CRUSTACEA. 



pair excepting the last consists on either side of two blind sacs. The 

 branchial thoracic appendages are attached to the margins of the seg- 

 ments, or normally to the bases of the legs. The legs are quite small, 

 and terminate in a small hand. 



Argeia pugettensis. 



Feminae: — Corpus parce oblongum, usque ad extremitatem bene articu- 

 latum, segmentis numero 15. Caput transversum. Appendices 

 abdominales submarginales, 10 anticce bi-partitos, ramo externo sat ob- 

 longo, interne- subgloboso, parvo ; duo3 posticce simplicissimoe, oblongo3. 

 Maris: — Corpus fere lineare. Abdomen late ovatum, mar gine inte- 

 grum, post ice subacutum. 



Female : — Body sparingly oblong, quite to the extremity prominently 

 jointed, the segments fifteen in number. Head transverse. Abdo- 

 minal appendages submarginal; the ten anterior bi-partite; outer 

 branch oblong, inner subglobose and small; two posterior quite 

 simple, oblong. Male: — Body nearly linear. Abdomen broad 

 ovate, margin entire, subacute at extremity. 



Plate 53, fig. 7 a, male, enlarged ; a', extremity of leg ; b, female, 

 upper view ; c, same, under view ; d, leg of fourth pair of female ; d', 

 same, in another position ; e, fifth pair ; e', same, in another position. 



From Crangon munitus, Puget's Sound, Northwest Coast of Ame- 

 rica. 



Length of female, three to four lines; of male, a line. The egg- 

 pouch of the females is nearly circular in outline, and lies beneath the 

 thorax, encroaching hardly upon the abdomen. The under surface of 

 the female abdomen is naked, showing well the articulations across, 

 and having only a narrow part towards the margin covered with the 

 inner branch of the abdominal appendages. The maxillipeds in the 

 females are each a small oblong plate, placed transversely, not one- 

 sixth as large as the left lamina of the first pair covering the eggs. 

 In their natural position, the male legs do not project beyond the 

 margin of the body, as observed in a dorsal view. The head in the 



