276 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
expected only where the surface temperature was high. And this 
proved to be the case. Salpae were more or less abundant at all the 
stations south of New York and over the outer edge of the continental 
shelf (Fig. 67). By the first of August they had extended their range — 
to the waters off New York (Station 10082). And although they had 
Fic. 67.— Distribution of Salpa. pb, S. democratica; D, S. democratica 
swarms; 7, S. tilesii; r, S. fusiformis; c, 8S. confoederata; s, S. cylindrica; 
z, S. zonaria. The curve is the probable northern limit of Salpae at the 
time of our cruise. 
not then reached the south shore of Long Island (Station 10083), 
they do so more or less regularly later in the season. The only 
Salpae encountered in the Gulf of Maine were a few specimens of 8. 
tilesii which were taken on the eastern side (Station 10096). And I 
