2 G. HERBERT FOWLER. 
this latter is developed, however, varies much in specimens from other localities. 
There seems no reason to regard these two points as sufficiently important to justify 
the separation of Antarctic specimens from D’Orbigny’s species, 
Formule, based on thirty-four specimens :— 
75 13 7-8 4-5 8-9 
55 15-18 Uf A=) 7-9 
51 2 8-9 5 7 
50 214 8 if 7 
47 14-17 6-8 4—5 7-9 
43 13-15 7-8 3) 5-7 
39 1145) 8-9 4 6-7 
38 15 8 i) 6 
34 1k} 8 3 5-6 
33 18 7-8 4-5 6-7 
231 y 9 4 if 
30 16 8-9 4—5 7 
29 16-17 7-9 4—5 4-7 
28 19-21 7-9 4 5-6 
27 18 9 3 3-4 
y 19 8-10 3-4 4—6 
24 16-20 8—9 4 4—5 
ZB DD, 10-12 3—4 i) 
21 eal 10 4 3 
19 Frill 7-9 2 3 
We 20 9 3 2, 
16 [eca. | 2 7 4 5 
15 23 8-9 3 3 
SAGITTA SERRATO-DENTATA. 
Sayitta serrato-dentata, Krohn, Archiy fiir Naturgeschichte xix. (18538), p. 272. 
As will be shown below, this is not a truly Antarctic form. It appeared to be 
male-ripe at about 12 mm. of total length; no really female-ripe specimens occurred. 
Formule, based on 8 observations :— 
13 27 7 6 10 
12 39 if 5-6 tlallil 
11 36 7 4-5 9-10 
10 40 Ul 4. 6 
9 2 7-8 4 7 
