70 
PACIFIC SCIENCE, Vol. XV, January 1961 
and S. selkirki Fagetti have numerous short, 
soft protuberances (Fig. 6). This being true, 
S. serratodentata tasmanica cannot possibly be 
the species Tokioka describes (1959). The 
seminal vesicles which Tokioka (1959, fig. 7, 
p. 368) illustrated and described as belonging 
to S. serratodentata tasmanica Thomson, differ 
from the descriptions and figures of the seminal 
vesicles for this species as given by Thomson 
(1947) and Furnestin (1957), and for S. sel- 
kirki by Fagetti ( 1958) . S. bierii n. sp., recorded 
Fig. 3. Sagitta bierii. a, Seminal vesicles, lateral 
view; b, ovary, lateral view. 
Fig. 4. Sagitta bierii. Distribution of size in relation 
to the sexual stages, April 1958. Stage I, ; Stage 
II, Stage III, ..... 
from the same area where Tokioka (1959) re- 
ports S. serratodentata tasmanica, has seminal 
vesicles with one prominence at the anterior 
end (Fig. 2a, b) as figured by Tokioka for S. 
serratodentata tasmanica. 
Tokioka’s (1959, fig. 12, p. 372) figure of 
the left seminal vesicle for ? S. serratodentata 
atlantica does not agree with his own descrip- 
tion of the seminal vesicles for this species (To- 
kioka, 1940, p. 373 and fig. 7d, p. 374) nor 
with that given by Furnestin (1957, fig. 53, p. 
150). The seminal vesicle which Tokioka 
(1959) describes as belonging to ? S. serrato- 
dentata atlantica agrees with his drawing for 
S. serratodentata tasmanica in the same paper. 
In revising the chaetognaths of the " serrato- 
dentata group” from both the Atlantic and Pa- 
cific, it was easy to separate specimens belong- 
ing to the different species. Since the char- 
acteristics for each species appear constant with 
no characteristics in common among the differ- 
ent species except for the serrations on the 
hooks, each one can be considered to rank as 
a species. The fact that each one of these species 
typifies different masses of water offers addi- 
tional evidence for considering each one a good 
species. A revision of the name of each species 
appears at the top of each column in Table 2. 
Named after Dr. Robert Bieri, who recorded 
it in his work as Sagitta sp. in the " serratoden- 
tata group.” 
HOLOTYPE: USNM no. 29919. 
PARATYPES: USNM no. 29920. 
