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PACIFIC SCIENCE, Vol. IX, April, 1955 
Fig. 8. Chart showing distribution of Cyclosalpa strongylenteron and Cyclosalpa pinnata quadriluminis. 
Cyclosalpa pinnata quadriluminis , aggregate 
generation 
Body : (Fig. 7) The body exhibits the typical 
shape of the aggregate generation of C. pin- 
nata but the test is thicker than generally 
found in the species. The size of the specimens 
ranged from 10 to 50 mm. 
Muscles: The four body muscles are all con- 
tinuous dorsally. Muscles I and II and mus- 
cles III and IV are fused for a short distance 
over the dorsal midline (Fig. 6d). In the 
specimens examined this fusion does not ex- 
tend as far as indicated for polae by the figures 
of Sigl (1912: 66-74) and Sewell (1926: 72). 
Body muscles I and II fuse ventrally and 
continue into the peduncle as the posterior 
peduncle muscles. The single oral retractor 
branches to form the three sphincters of the 
lower lip. Of the three dorsal oral sphincters 
the first is an independent muscle while the 
second and third originate from the inter- 
mediate muscle just above the point where 
