106 



Dean F. Bumpus and E. Lowe Pierce 



- NUMBER PER 10 CUBIC METERS 

 = • = <I0 \ 



10-50 



>50 



. NUMBER PER 10 CUBIC METERS 

 0=0 • = <I0 



• = 10-50 



Fig. 12. Distribution of 5. enflata, S. helenae, S. minima, S. serratodentata, S. tenuis and P. draco, 

 upper in May and June 1953, Caryn Cruise 64, lower in January 1954, Atlantis Cruise 196. 



It was a common chaetognath over the shelf but seldom appeared in numbers as large as S. enflata, 

 S. helenae, or S. serratodentata. It was somewhat more abundant in the spring than in the winter and 

 was usually associated with water close to 36°/oo in salinity. 



Sagitta serratodentata was one of the most abundant and widely distributed species found in these 

 collections (Fig. 12). It covered the continental shelf in Carolinian and Virginian Coastal water from 

 the ten-fathom line into the Florida Current as far as the stations extended. This species occurred 

 commonly in numbers of 10 to 40 per ten cubic metres in both spring and winter and was noticeably 

 more abundant near the edge of the continental shelf. Its distribution was similar to that of S. minima 



