FISHERY BULLETIN: VOL. 72, NO. 3 



and Guayaquil, Ecuador; are from places where 

 fishing is active or from fish markets. 



Remarks.— The type locality lies at the extreme 

 northern end of the distributional range, seem- 

 ingly so far removed from the remainder of the 

 range that one might question origin of the syn- 

 types. Xantus (Madden, 1949) was an excellent 

 and energetic collector for the Smithsonian In- 

 stitution who lived and worked at Cabo de San 

 Lucas from 4 Apr. 1859 to 7 Aug. 1861. Collectors 

 then were not so precise about recording locality 

 data as today, and Xantus was no exception. It is 

 known that collections were brought to Xantus 

 from Bahia Magdalena to the north and Revil- 

 lagigedo Island to the south, etc., and that he vis- 

 ited Mazatlan on the mainland in summer, 1861, 

 returning to Cape San Lucas on 1 Aug. Though 

 no collection date is recorded with the types, MCZ 

 received its specimens from the Smithsonian 

 Institution on 13 Feb. 1861, which would seem to 

 limit origin of the specimens to the tip of Baja 

 California or at least rule out collection on the 

 mainland closer to the rest of the range for the 

 species. Moreover, an ovigerous female bearing a 

 Cabo de San Lucas label (MCZ 5184), received 

 with the mature types, suggests a breeding popu- 

 lation and not an accidental occurrence. 



Usual habitat of the species suggests that the 

 Juan Fernandez collection is extraterritorial. Set 

 of currents between this isolate and the nearest 

 known population in Peru suggest that if a breed- 

 ing population does exist there, it is introduced. 

 Further collecting both here and in the Cabo de 

 San Lucas area would be useful. 



Material. — Total: 30 lots, 120 specimens. 



Specimens listed in Rathbun (1930) from 

 USNM and MCZ; Garth and Stephenson (1966) 

 from AHF and USNM. 



USNM. 19 lots, 44 specimens, including the 

 following not cited above: 



MEXICO 



Sinaloa and Nayarit: 61023, 1926, 1 6 (dry), C. 

 Stansch, No. 33. 



COSTA RICA 



1 12356, Golfo de Nicoya, Jan. 1952, 2 carapaces 

 (dry), S. E. Erdman. 



PANAMA 



73283, Bahia Honda, 9 Mar. 1933, 1 juv, W. L. 

 Schmitt. 122920, no date, 1 6. 



COLOMBIA 



77045, Buenaventura, 18 Nov. 1934, 1 2 juv, R. 

 Mensing. 



AHF. 8 lots, 44 specimens, including the follovv- 

 ing not cited above: 



[Nicaragua material Stn. 962-39 = a Portunus 

 species]. 



COSTA RICA 



Bahia Carrillo, 6 Feb. 1938, 1 S,Zaca Stn. 208, 

 NYZS 38,194. Golfito, Golfo Dulce, 6 Mar. 1938, 1 

 $,Zaca, NYZS 38,525. 



MCZ. 5 lots, 28 specimens, including the follow- 

 ing not cited above: 



MEXICO 



Baja California: 5184, Cabo de San Lucas, no 

 date, 1 ? (ov), J. Xantus. (reed, from Smithsonian 

 Inst. 13 Feb. 1861). Guerrero: 5185 and 8755, 

 Acapulco, Aug. 1872, 9 <5, 15 $ (1 ov), Hassler 

 Exped. 



AMNH. 1 lot, 3 specimens. 



COLOMBIA 



10587, Tumaco, 19 Apr. 1941, 2 <J, 1 9, Askoy 

 Exped. 



RMNH. 1 lot, 1 specimen. 



Cat. a. South America, 1 S (dry), Latreille. 



Supplementary literature records. — Acapulco, 

 Guerrero, Mexico (Contreras, 1930); Acajutla, 

 Barra Ciega, La Libertad, La Union, El Salvador 

 (Bott, 1955); NW Corinto, Nicaragua (Garth and 

 Stephenson, 1966); Baudo, Juanchaco, Catripe, 

 Togoroma, Malaga, Buenaventura, Guapi, San 

 Juan del Sur, Cabo Manglares, Punta Coco, and 

 Tumaco, Colombia (Estevez, 1972). 



CALLINECTES BOCOURTI 



A. MILNE EDWARDS 



Siri (Brazil) 



Figures 12, 18j, 20m, 22j, 27 



Cancer pelagicus .- de Geer, 1778, p. 427, pi. 26, 

 figs. 8-11. 



766 



