376 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 5 



over 100 years, and since Cuming, who obtained the original specimens, 

 also visited the mainland of Ecuador, it is possible that he may have con- 

 fused the localities on this species. The same would hold true for D. gib- 

 bosus if its habits are at all similar. 



Subfamily ACANTHONYGHINAE 



Genus AGANTHONYX Latreille, 1825 



Acanthonyx petiverii Milne Edwards 



Plate 63, Fig. 4 



Acanthonyx petiverii Milne Edwards, Hist. Nat. Crust., vol. 1 p. 343, 

 1834. Rathbun, Bull. 129, U.S. Nat. Mus., p. 142, pi. 44; pi. 222, 

 figs. 1-6, and synonymy, 1925. Boone, Zoologica, vol. 8, no. 4, p. 137, 

 fig. 38, 1927. Finnegan, Journ. Linn. Soc. London, vol. 37, p. 620, 

 1931. Hult, Arkiv for Zoologi, Band 30A, no. 5, p. 11, 1938. 

 Type locality. — The Antilles. 

 Type. — In Paris Mus. 



Range. — From Magdalena Bay, Lower California, to Valparaiso, 

 Chile (Dana) ; Galapagos Islands (Bell) ; occurs also in the Atlantic. 



Diagnosis. — A large hepatic lobe and 2 small branchial lobes tufted 

 with hair. Three tufted tubercles on gastric region, one cardiac, one 

 intestinal. 



Material examined (38 specimens from 12 stations). — 

 27-33. Gardner Bay, Hood Island, shore, Jan. 25, 1933, 1 male. 

 38-33. SE of Cormorant Point, Charles Island, shore, Jan. 29, 1933, 



5 males, 7 females (3 ovig.), 7 young. 

 46-33. Barrington Island, 4-10 fms, Feb. 2, 1933, 2 females. 

 66-33. Tagus Cove, Albemarle Island, 10-20 fms, Feb. 9, 1933, 1 



male, 1 female. 

 146-34. Albemarle Point, Albemarle Island, shore, Jan. 12, 1934, 1 



male (photographed), 1 female. 

 147-34 to 151-34. Tagus Cove, Albemarle Island, Taylor's sargassum, 



Jan. 13, 1934, 1 specimen. 

 152-34. Tagus Cove, Albemarle Island, coral, Jan. 14, 1934, 2 ovig. 



females. 

 154-34. Reef north of Tagus Hill, Albemarle Island, reef, Jan. 15, 



1934, 1 male, 1 female. 

 157-34. Tagus Cove, Albemarle Island, 10-18 fms, Jan. 15, 1934, 1 



male. 

 161-34. Black Beach, Charles Island, 3 fms, Jan. 17, 1934, 2 males, 

 2 young. 



