88 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



S. fusiformis, form aspera, but no indication of this is found. The 

 asperate S. fusiformis bears no special spinose thickenings near the 

 base of the atrial siphon. The anterior and posterior protuberances 

 in S. maxima tubcrculata resemble those of S. fusiformis aspera only 

 in their unusual length, not in form or exact position. The test on 

 the ventral surface is thickened as in S. maxima, S. fusiformis aspera 

 showing no such thickening. The ciliated funnel is curved as in 

 S. maxima, not straight as in S. fusiformis aspera. The eye is of 

 the short and compact S. maxima character, differing from the more 

 elongated S. fusiformis aspera eye. The intestinal "nucleus" is a 

 lateral mass in a thick semi-opaque spheroidal protuberance of the 

 test as in S. maxima proper, while in S. fusiformis and its form 

 aspera the intestinal mass protrudes very little and the test sur- 

 rounding it shows little modification. There seems to be no indica- 

 tion of hybrid character in S. maxima tuberculata. 



SALPA FUSIFORMIS Cuvier, 1804. 



S. maxima, variety, ForskAl, 1775. 



S. fusiformis Cuvier, 1804. 



S. runcinata Chamisso, 1819. 



(?) S. moniliformis Macculloch, 1819. 



(?) S. dubia Chamisso, 1819. 



S. clostra Milne-Edwards, quoted by Cuvier, 1828. 



S. maxima Meyen, 1832. 



5. pyramidalis Lesson, 1832. 



5. runSinata-fusiformis Krohn, 1846. 



S. cymbiola Dall, 1872. 



S.fusiformisApsTEiN, 1893, b. 



This species, which is one the most abundant of the Salpidae, has 

 been studied by many persons. I have had very abundant material 

 from many localities. 



In the collections of United States National Museum the following 

 specimens are listed: 



Cat. No. 3067, U.S.N.M. (solitary form), Carnegie Magnetic Ex- 

 pedition, Pacific Ocean between the Hawaiian Islands and California; 

 one specimen. 



Cat. No. 6444, U.S.N.M. (embryo), Albatross station D. 2029, south 

 of Marthas Vineyard; May 25, 1883; 1,168 fathoms; surface tempera- 

 ture, 53° F.; one specimen. 



Cat. No. 6445, U.S.N.M. (aggregated form), Carnegie Magnetic 

 Expedition, Pacific Ocean between Hawaiian Islands and California; 

 four specimens. 



Cat. No. 6446, U.S.N.M. (embryo, old), Albatross station D. 2583, 

 south of Block Island, September 19, 1885; 131 fathoms; surface 

 temperature, 70° F.; one specimen. 



Cat. No. 6522, U.S.N.M. (chain and embryo), Albatross station D. 

 5456, east coast of Luzon, San Bernardino Strait to San Miguel 



