166 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



We see, therefore, that while the comparative anatomy of the 

 adult Tunicata tells us little of the origin of the Doliolidae and 

 Salpidae, the comparative study of the manner of budding gives us 

 reason for believing that Doliolum arose from Pyrosoma-\ike ancestors, 

 by giving up the compact colonial form, and that from DoliolumAike 

 ancestors arose the Salpidae. 



DISTRIBUTION OF THE SALPIDAE. 



The distribution of the Salpidae has been studied chiefly by 

 Traustedt (1893), Apstein (1894, b, 1901, 1904, 1906, a and b), and 

 Ihle (1910). 



Apsteinia asymmetrica is known from the equatorial Atlantic Ocean 

 off Africa (Apstein, 1906, b) and from the North Atlantic Ocean east 

 of Iceland (Fowler, 1896). 



Apsteinia magalhanica is known from the Straits of Magellan 

 (Apstein, 1894) and off the Cape of Good Hope (Apstein, 1906, b). 

 We have not studied this species. 



Apsteinia punctata is known from the western Atlantic Ocean off 

 Bermuda (Traustedt, 1893), from the central equatorial Atlantic 

 Ocean (Apstein, 1906, b), from the East Indies (Ihle, 1910), and it is 

 more frequently found in the western Mediterranean Sea. Our 

 material is from Naples, probably collected in the western Medi- 

 terranean Sea. 



Brooksia rostrata is known from the western (Apstein, 1906, b) and 

 central (Traustedt, 1893) north Atlantic Ocean, from the western 

 and central equatorial Atlantic Ocean (Apstein, 1906, b), from the 

 southern Indian Ocean (Apstein, 1906, b), and from the East Indies 

 (Ihle, 1910). We have had no specimens of this rare salpa. 



Cyclosalpa affinis was one of the earliest forms discovered and has 

 been often collected. It has been reported from the eastern and 

 central North Atlantic Ocean, also from east of Bermuda, from the 

 eastern and central equatorial Atlantic Ocean, from the western 

 Mediterranean Sea, from the northeastern and the northwestern 

 Indian Ocean, from off the east coast of Australia, from the eastern 

 Pacific Ocean from southern California to Hawaii and southward. 

 We add from our collections a station in the northwestern Atlantic 

 Ocean off Marthas Vineyard, and stations in the northern Pacific 

 Ocean off the California and Alaska coasts and in Bering Sea. 



Cycolsalpa bakeri has been reported from the coast of southern 

 California (Ritter, 1905), and from the southern East Indies (Ihle, 

 1910). Apstein (1906, a) describes and figures as Cyclosalpa jloridana 

 a form which is really C. bakeri, failing to distinguish between the two 

 species. In this paper he gives the following localities for li C. 

 Jloridana:" Off the west coast of Africa from the Equator to the Cape 

 of Good Hope, the northeastern Indian Ocean, and off the Somali 

 coast of Africa. Some of the salpas so reported were Cyclosalpa 



