300 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.21 



Remarks: The additional material extends the range of the species 

 from the type locality, near Acapulco, Guerrero, north to Tenacatita 

 Bay, Jalisco, Mexico. 



Genus HERBSTIA Milne Edwards 



Herbstia Milne Edwards, 1834, p. 301. A. Milne Edwards, 1875, p. 75. 



Holmes, 1900, p. 36. Rathbun, 1925, p. 293. 

 Rhodia Bell, 1835b, p. 169; type: R. pyriformis Bell, 1836, by monotypy. 

 Herbstiella Stimpson, 1871a, p. 93; type: Herbstia depressa Stimpson, 



1860, by original designation. 

 Fisheria Lockington, 1877c, p. 72; type: F. depressa Lockington, 1877 

 = Herbstiella camptacantha Stimpson (not Herbstia depressa Stimp- 

 son ) , by monotypy. 



Type: The Mediterranean Cancer condyliatus Fabricius, 1787, type 

 of Herbstia Milne Edwards by monotypy. 



Description: Carapace broadly triangular or subpyriform, tubercu- 

 lated or spinose. Rostrum short, the horns acute, vertically compressed, 

 and dilated at the base. Orbits shallow, with or without a preorbital 

 spine. Eyes short and not entirely concealed when retracted. Basal anten- 

 nal [article] moderately dilated and armed with an anteroexternal spine, 

 the distal portion not entirely covered by the rostrum. Merus of maxilli- 

 peds distally truncated and not produced at the outer angle.* Ambula- 

 tory legs rather slender, subcylindrical, and of moderate length ; dactyls 

 nearly straight, acute. 



Abdomen in the male seven- [segmented], (Holmes) 

 Range: Eastern Pacific from Monterey Bay, California, to Santa 

 Elena Bay, Ecuador ; Guadalupe, Clarion, Cocos, and Galapagos Islands. 

 Western Atlantic: St. Thomas, Barbados, and Curacao. Eastern Atlan- 

 tic: African west coast and Mediterranean. Shore to 50 fathoms. 



Key to the Pacific American Species of Herbstia 



la. Ambulatory legs spinulous. Orbit with one or more teeth. 

 Carapace not strongly produced posteriorly. Male first pleopod 

 without a notch 

 2a. Only one supraorbital tooth between pre- and postocular 



teeth. Male first pleopod with a setiferous fold in concave 



margin 



*An exception will be noted in Herbstia ediuardsi Bell. 



