BIGELOW: EXPLORATIONS IN THE GULF OF MAINE. 123 
Number of specimens 
Station S. elegans S. serratodentata 
a) 0 1 
Pa 2 3 
23 1 2 
Pas 23 § 
\ Zt 15 5 
28 6 25 
30 swarm 12 
31 2 64 
32 20 swarm 
33 50 4 
35 3 0 
36 30 15 
38 swarm 2 
40 10 2 
41 0 1 
43 3 0 
44 26 1 
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 Stawrophora mertensti; 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 
