Boone, Crustacea, Cruises of "Eagle" and ''Ara," 1921-28 105 



Smith, Proc. U. S. Nat. Mus., vol. Ill, p. 80, 1885 (1886).— 



Benedict, Proc. U. S. Nat. Mus., vol. 16, p. 540, 1893.— Maby J. 



Eathbun, Ann. Inst. Jamaica, vol. 1, art. 1, p. 46, 1897. — Bull. 



U. S. Fish Comm., vol. 20, pt. 2, p. 100, 1900 (issued 1901).— 



Verrill, Trans. Conn. Acad. Arts and Sci., vol. 10, p. 580, 



1900. — M. J. Rathbun, Rapport Betreffende een vooloopig onder- 



zoek naar den toestand van de visscherij in de Kolonie Curagao, 



p. 319, 1907.— Lefebvee, Bull. Mus. Hist. Nat. Paris, vol. 14, 



p. 267, 1908. — A. Milne Edwards and E. L. Bouvier, Mem. 



Mus. Comp. Zool., vol. 27, p. 235, pi. 6, figs. 11, 12, text figs, 64-67, 



1909.— Pesta, Archiv. f. Naturg., vol. 81, abteil A, Heft I, p. 113, 



1915. — Balss, Beitr. Kenntis Meeresfauna West Africa, vol. 2, 



p. 14, 1916. — Sumner, et al, Bull. U. S. Fish. Comm., vol. 31, 



pt. 2, p. 665, 1911.— Hay and Shore, ibid, vol. 35, p. 337, pi. 35, 



fig. 6, 1918. — ScHMiTT, Bijdragen tot der dierkunde, Amsterdam, 



23E Alf., p. 61, 1924.— Bull. Amer. Mus. Nat. Hist., vol. 53, art. 1, 



p. 9, 1926. — Boone, Bull. Bingham Oceanog. Coll., vol. 1, art. 2, 



p. 78, 1927. 



Peneus setiferus (Linnaeus). 



Plate 31, figs. A and B. 



Type: Habitat in the *' Indies." 



Distribution: From Beaufort, N. C, throughout the southern 

 United States, the Gulf of Mexico and the upper "West Indies. 



Material examined: One specimen dredged in the Marquesas 

 Keys, Florida, 30 fathoms, March 2, 1924, by the ''Ara." 



Color: In life this shrimp is a translucent bluish- white with 

 irregular bands or splotches composed of minute black flecks. 



Technical description : In size this shrimp approximates the well 

 known Peneus drasiliensis. According to Mr. W. P. Hay, P. setiferus 

 matures in greater abundance at Beaufort, N. C, earlier in the 

 summer than does P. irasiliensis, both of which species are of 

 economic importance in the Southern States and are also shipped 

 to northern markets. P. setiferus has the following chief differences 

 from P. hrasiliensis : The rostral carina of setiferus extends not 

 quite to the postlateral margin of the carapace, and the lateral sulci 

 terminate posteriorly about opposite the hindmost rostral tooth, while 

 in hrasiliensis the median carina and its lateral sulci extend quite to 

 the posterior margin of the carapace. The upper rostral margin of 

 setiferus is armed with nine or ten teeth, the most anterior of which 



