BIGELOW: 



EXPLORATIONS IN THE GT 



JLF OF MAINE. 





Number of 



specimens 



Station 



S. elegans 



S. serratodentata 



21 







1 



22 



2 



2 



23 



1 



2 



25 



23 



8 



27 



15 



5 



28 



6 



25 



30 



swarm 



12 



31 



2 



64 



32 



20 



swarm 



33 



50 



4 



35 



3 







36 



30 



15 



38 



swarm 



2 



40 



10 



2 



41 







1 



43 



3 







44 



25 



1 



123 



The stations at which S. elegans was most abundant (Plate 5) were 

 2, 7, 12, 14, 19, 20, 25, 27, 30, 32, 33, 36, 38, 44. Most of these stations 

 are near shore; the only one which is not, Station 7, is within the influ- 

 ence of coast water, as described above (p. 91), and the same is true of 

 Station 25. At Station 43, however, but few were taken, and salinity 

 shows that this is not coast water. So far as last summer's work 

 shows, elegans is neritic in the Gulf; serratodentata oceanic. But there 

 is, of course, no sharp line between the two. 



Two other chaetognaths may be mentioned here, because of their 

 geographic importance: — Sagitta lyra, taken once, two specimens, 

 Station 31, 55-0 fathoms, and Eukrohnia hamata, likewise taken 

 only once, in the same haul, about twenty specimens. This species 

 is discussed (p. 106). 



Medusae. — There are several Medusae of importance in the present 

 connection. Chief among them, because so often called an Arctic 

 form, is Staurophora mertensii; but as pointed out (p. 106) this species 

 is not an index of polar water, for it is known from Helgoland. Large 

 Staurophora (Plate 6) were seen, and taken, at Stations 14, 15, 19, 22, 

 23, 25, 26, 26b, 31, 33, 34, 36, 40, 41, 42, 43, in the Grand Manan 

 Channel, and at Eastport; showing that it was very generally distrib- 

 uted over the Gulf, with the notable exceptions that it was not met 



