vou2, pt. 2.] A TAXONOMIC STUDY OF THE SALPIDAE METCALP. 83 



protuberance is strongly asymmetrical. In S. fusiformis both are 

 large and somewhat asymmetrical. In both the type form and the 

 form aspera the protuberances are often reduced in size, but are still 

 asymmetrical. In S. cylindrica the processes are still more reduced 

 and are nearly symmetrical. The gut in both forms of all species is 

 a compact "nucleus." 



SALPA MAXIMA Forsk&l, 1775. 



S. maxima Forskal, 1775. 



S. africana ForskAl, 1775. 



S. birostrata de Blainville, 1827. 



(?)£. forsJcalii Lesson, 1832. 



5. africana-maxima Krohn, 1846. 



S. maxima Apstein 1894, b. 



This species has been studied by many students, among them 

 Traustedt (1885), Herdman (1888), Brooks (1893), Goppert (1892), 

 Metcalf (1893), and Streiff (1908). 



The following specimens are in the collection of the United States 

 National Museum : 



Cat. No. 6448, U.S.N.M. (aggregated form), from Naples Zoological 

 Station; 15+ specimens in a chain. 



Cat. No. 6459, U.S.N.M. (solitary form), from Naples Zoological 

 Station; one specimen. 



Cat. No. 6520, U.S.N.M. (aggregated form), Albatross station D. 

 5458, east coast of Luzon, San Bernardino Strait to San Miguel Bay, 

 Philippine Islands; June 8, 1909; surface; surface temperature, 85° 

 F.; two specimens. 



Cat. No. 6525, U.S.N.M. (aggregated form), Albatross station D. 

 5669, Macassar Strait, Philippine Islands; December 29, 1909; sur- 

 face; surface temperature, 84° F.; two specimens. 



Cat. No. 6555, U.S.N.M. (solitary and aggregated forms), Jolo An- 

 chorage, Jolo, Philippine Islands; March 5, 1908; surface; two speci- 

 mens. 



Cat. No. 6557, U.S.N.M. (solitary form), Albatross station D. 5539, 

 between Negros and Siquijor, Philippine Islands; August 19, 1909; 

 surface; surface temperature, 83° F.; one specimen. 



Cat. No. 6612, U.S.N.M. (solitary form), Albatross station D. 5155, 

 Sulu Archipelago, Tawi Tawi group; February 19, 1908; surface; 

 surface temperature, 81° F.; surface density, 1.02437; 13 specimens. 



Cat. No. 6614, U.S.N.M. (solitary form), Albatross station D. 5166, 

 Sulu Archipelago, Tawi Tawi group; February 24, 1908; surface; 

 3urface temperature, 81° F.; surface density, 1.02644; one specimen. 



Cat. No. 6616, U.S.N.M. (aggregated form), Albatross station D. 

 5186, between Panay and Negros, Philippine Islands; March 30, 1908; 

 surface; surface temperature, 80° F.; surface density, 1.02530; 13 

 specimens. 



