106 Bulletin, Vanderhilt Marine Museum, Vol. Ill 



is a little in advance of the eye ; there are two teeth on the inferior 

 margin. The apex is an acuminate thick tooth, reaching slightly 

 farther forward than the seaphocerite. The supra-antennal and 

 hepatic spines and hepatic suture are about the same as in brasiliensis. 

 The abdominal segments are also similar to brasiliensis; in setiferus 

 there is a median carina extending on the hinder three-fourths of the 

 fourth segment, the entire fifth and sixth segments, terminating on 

 the posterior margin of the latter in a small tooth. The telson has 

 a median sulcus, throughout its length. As in brasiliensis, there are 

 on the fifth abdominal segment on each side one short, diagonal mark, 

 and similarly on the side of the sixth abdominal segment three, short, 

 subequal linear marks, diagonally placed and equally spaced, as on 

 the identical segments of brasiliensis. 



The antennular peduncle is stocky, about as long as the seaphocerite, 

 both normally a little shorter than the rostrum, but offering no specific 

 characters. 

 Synonymy. — Cancer setiferus Linnaeus, Syst. Nat., ed. 12, p. 1054, 



1767. 

 Peneus fluviatilis Say, Journ. Acad. Nat. Sci. Phila., p. 236, 1818. 

 Peneus setiferus H. Milne Edwards, Hist. Nat. Crust., vol. 2, p. 414, 

 1837. — GiBBES, Proc. Amer. Assoc. Adv. Sci., vol. 3, p. 199, 

 1850.— Stimpson, Ann. Lye. Nat. Hist. N. Y., X, p. 133, 1871.— 

 KiNGSLEY, Proc. Acad. Nat. Sci. Phila., vol. 30, p. 330, 1878-79.— 

 R. Rathbun, Report Fisheries Indust. U. S., vol. 1, p. 821, pi. 

 273, 1884.— M. J. Rathbun, Proc. Wash. Acad. Sci., vol. II, 

 p. 151, 1900. — FowLEE, Report N. J. State Museum, Crust., 

 p. 316, 1921.— Hay and Shore, Bui. U. S. Bur. Fish., vol. 35, p. 

 378, pi. 35, fig. 5, 1918. 



Peneus "brevirostris Kingsley. 



Plate 32, text fig. 2 A, B. 



Type: Elingsley's type was taken at Realgo, Nicaragua, and is 

 deposited in the Academy of Natural Sciences of Philadelphia. 



Distribution: From San Francisco Bay, southward to the Pearl 

 Islands, Panama, and also at the Galapagos Islands. 



Material examined: One large specimen taken at Conway Bay, 

 Indefatigable Island, Galapagos, March 1, 1926, by the "Ara," 

 William K. Vanderbilt, commanding. 



Color: This shrimp is a deep orange-pink both on the body and 

 appendages, the deeper tone being accentuated along the suture lines 



