Chaetognatha of the Monsoon Expedition— Alvarino 
343 
FIG. 5. Distribution of S', 
vious expeditions. 
robust a and S. ferox in the Indian Ocean, including positive records from pre- 
( 1926), George ( 1949, 1952), Oye (1918), 
Ritter-Zahony (1909, 1910, 1911), and Schilp 
( 1941 ) recorded both under the S. robusta syn- 
onymy. Rao (1958*, b) and Rao and Ganapati 
(1958) records of S. robusta probably correspond 
to S. ferox and those of S . hispida to S. robusta . 
Tokioka (1940) recorded both species in 1955, 
and in 195 6b only S. robusta , in 1956*, both 
species, although S. ferox is recorded under the 
S. ai Tokioka synonymy. Other records: Chacko 
(1950), John (1933, 1937), and Varadarajan 
and Chacko ( 1943 ) . 
S . bipunctata was abundant In the stations 
north of 30° S. According to the data obtained, 
it appears that the populations of S. bipunctata 
of the Indian and Pacific oceans connect along 
the Indonesian seas, as no 5". bipunctata was 
observed south of parallel 30° S; while the 35° 
S parallel appears to be the southern boundary 
for this species in the Pacific (Alvarino, 1964*, 
and other unpublished data; Bieri, 1959). It 
inhabits the Tropical Equatorial and Central Pa- 
cific waters. Other records in the Indian Ocean: 
Baldasseroni (1915), Beraneck (1895), Cleve 
(1901), Oye (1918), Rao (1958*), Rao and 
Ganapati ( 1958) , Ritter-Zahony (1910, 1911), 
Schilp (1941), Thomson (1948), and Tokioka 
(1940, 1955, 1956b). The Burfield and Harvey 
(1926) and George (1952) drawings of S. 
hispida are more likely to be of S. bipunctata . 
S. bedoti appeared abundantly in the Indo- 
nesian seas to the southwest of Java, a position 
between Cocos Keeling Isl. and the Christmas 
Islands. Other records in the Indian Ocean: 
Baldasseroni (1915), Beraneck (1895), Bur- 
field and Harvey (1926), Doncaster (1903, as 
S. poly don), Fowler (1906), George (1952), 
Lele and Gae (1936), Pillai (1944), Rao (1958*)', 
Rao and Ganapati (1958), Ritter-Zahony (1910) 
Schilp (1941), Subramanian (1940), and To- 
kioka (1955, 1956*, b). 
S. neglecta was recorded only at station 11 
(11° 15' S— 103° 32' E). Other records in the 
Indian Ocean: Baldasseroni (1915), Burfield 
