BY T. HARVEY JOHNSTON AND B. BUCKLAND TAYLOR. 33 
comparatively slender, firm and opaque, with a fairly 
uniform breadth to the septum. The corona ciliata is 
entirely on the body ; a very noticeable collarette is present 
extending over the whole head ; and apparently there is a 
thickening of the epidermis all over the body, bearing numer- 
ous tactile papillae. 
Australian localities: 50 miles E. of Sydney (June, 
1906) ; known also from Shark Bay, W.A. (Ritter-Zahony, 
1910). Also recorded from the East Indies ; Japan, Indo- 
Pacific ; Maldives. 
8. S. robusta Doncaster. 
Syn: S. hispida (non Conant) Aida, 1897 ; 
S. hispida Doncaster, 1902 ; 
S. ferox Doncaster, 1902 ; 
S. japonica Galzow, 1910. 
A firm opaque form, about the same width-from the 
ganglion to septum; many sensory papillae ove: whole 
body and tail ; collarette marked, though not so conspicu- 
ous as in regularis, extending to the anterior fin ; the pos- 
terior fin reaching the characteristically shaped seminal 
vesicles in mature specimens, as does also the tail fin ; the 
jaws thick at the base and greatly curved in the terminal 
third ; lateral process of vestibular ridge blunt ; papillae 
irregular and rather pointed. 
Australian localities: 50 miles E. of Sydney (June, 
1906) ; reported also from Great Sandy Island, Queensland 
(Ritter-Zahony, 1909). . Also recorded from New Guinea ; 
East Indies; Sea of Japan; Indian Ocean; Maldives ; 
Atlantic Ocean. 
9. S. bipunctata Quoy and Gaimard. 
Syn: S. multidentata Krohn, 1853 ; 
Spadella mariont Gourret, 1884. 
This form was not found among our Eastern Australian 
material, the following information being taken from Michael 
1911, p. 41). Body rigid; constriction at tail septum 
evident ; collarette very short ; anterior fin never extend- 
ing to ventral ganglion ; posterior fin longer than anterior, 
C 
