84 



BULLETIN" 100, UNITED STATES NATIONAL MUSEUM. 



Cat. No. 6627, U.S.N.M. (solitary form), Albatross station I). 5162, 

 Sulu Archipelago, Tawi Tawi Island; February 22, 1908; surface; 

 surface temperature, 80° F.; surface density, 1.02447; two specimens. 



Cat. No. 6556, U.S.N.M. (aggregated form), Philippines; surface; 

 one specimen. 



SALPA MAXIMA, solitary form. 



The characteristic shape of the body is well shown in figure 64. 

 The ventral half of the test is comparatively thick and firm. The 

 nine body muscles are limited to the dorsal half of the body. Each is 

 entirely independent. 



KjE J?^ W Y IT w r j 



a.o. 



Fig. 64.— Salpa maxima, solitary form, seen from the right side. Natural size. (Drawn by 



Hoyt S. Hopkins.) 



Most of my specimens agree with StreifT's in the character of the 

 oral musculature. (Fig. 65.) This shows the condition in my Medi- 

 terranean and Atlantic speci- 

 hM. ro.ens.and in Streiff's material. 



u - 3 -i- pri.b. In another of my specimens, 

 from an unknown locality, the 

 conditions are as in figure 64. 

 In this individual the ventral 

 end of the intermediate mus- 

 cle is separated from the rest 

 of the muscle. This specimen 

 also has no ventral oral re- 

 tractor, such as is shown by 

 Streiff, connected anteriorly 

 with dorsal sphincters 2 and 

 3 and ventral sphincter 2. 

 None of this muscle is present 

 except the postero-ventral 

 end, which is entirely uncon- 

 nected. It lies behind the 



./ ... 



IM. 



/.. 



fig. 65.— Salpa mamma, solitary form, oral muscles ventral moiety of the inter- 



seen from the left side. From Streiff (1908). j- - ,,,,i„ TU,~ ^4-l,«~ 



mediate muscle, llie other 

 oral muscles in this aberrant individual are about as shown by 

 Streiff. 



