DECAPODS I I I 



To the localities recorded by me in 1901 (he. fit.) may be added the 

 following : 

 Cedar Keys, Florida, in seaweed, between tides, two forms as described 



above (H. Hemphill). 

 Trinidad (Albatross). 



San Diego, California ; feet of first pair chelate (D. S. Jordan). 

 Off Abreojos Point, Lower California, 48 fathoms (Albatross station 



2834). 



Gulf of California, 29-71 fathoms (Albatross stations 2998, 3011, 3014). 

 Panama Bay, 51^ fathoms (Albatross station 2805). 



Range. Europe; Madeira; Bermudas; from North Carolina to 

 Trinidad, including Gulf of Mexico and West Indies; from San Diego, 

 California, to Panama Bay; Japan; Amboina. Shallow water to in 

 fathoms. 



Family CRANGONID^E. 

 Genus Crangon Fabricius. 



KEY TO THE SPECIES OF CRANGON. 



A. Gastric region not depressed below the general level of the carapace. 

 B. Carapace with i or more median spines. 

 C. Carapace with i median spine. 



D. Sixth segment of abdomen with 2 prominent longitudinal 



carinse dalli. 



D'. Sixth segment of abdomen not carinated. 

 E. Sixth segment of abdomen sulcate beneath. 



F. Manus of first pair of feet very slender, four or more 

 times as long as broad. Fifth abdominal segment 

 with a posterior spine at the supero-lateral angles. 

 G. Hand of male four and a half times as long as wide 



franciscorum. 

 G'. Hand of male five and a half times as long as wide 



franciscorum angustimana. 

 F'. Manus of first pair of feet not slender, less than three 



and a half times as long as wide. 

 G. Fifth segment of abdomen not carinate. 



H. Blade of antennal scale having its anterior margin 

 more advanced at its inner than its outer angle. 

 Sixth segment of abdomen with a large circular 

 spot on either side of its posterior end 



nigromaculata. 



H'. Blade of antennal scale having its anterior margin 

 retreating toward the inner angle. Sixth seg- 

 ment of abdomen without a large circular spot 



septemspinosa. 

 G'. Fifth segment of abdomen furnished with a superior 



median carina. 

 H. Antero-internal angle of scale advanced, reaching 



