BY T HARVEY JOHNSTON AND B. BUCKLAND TAYLOR. 35 
12. Pterosagitta-draco (Krohn). 
Syn: Pt. mediterranea Costa, 1869 ; 
Sagitta draco Krohn, 1858 ; 
Spadella draco of authors ; 
Spadella vaugai Beraneck, 1895. 
This species was not present in our Eastern Australian 
material, the following description being taken from Michael 
(1911, p. 54). Body firm and opaque; collarette very 
pronounced, measuring approximately 0.5% on each side 
of the body, and extending from head to tail septum ; 
ventral ganglion midway between head and tail septum. 
Length 7mm. ; tail 43.6%; tail to ventral ganglion 
66% ; anterior teeth 4-8 ; posterior teeth 8-18 ; jaws 8-10. 
Australian locality : Shark Bay, W.A. (Ritter-Zahony, 
1910). Also recorded from the Atlantic Ocean; Mediter- 
ranean Sea; Indian Ocean; Maldives ; Japan; Southern 
California ; Agulhas ; Antarctic. 
13. Krohnitia subtilis (Grassi). 
Syn: Sagitta subtilis Grassi, 1881. 
Spadella subtilis Grassi, 1883 ; 
Krohnia subtilis Strodtmann, 1892 ; 
K. pacifica Aida, 1897 ; 
EKukrohnia subtilis (Grassi). 
This species was not among out Eastern Australian 
material, the following description being taken from Michael 
(1911, p. 52). Body nearly transparent. long and slender ; 
neck evident ; seizing jaw very ilat, broad, thin and evenly 
curved, points extremely fine and delicate. 
Length 12-16mm. ; tail 30-34%; to ventral ganglion 
17-23% ; teeth 10-14; jaws 7-9. 
Australian locality : Shark Bay, W.A. (Ritter-Zahony, 
1910). Also recorded from the Atlantic Ocean; Black 
Sea ; Mediterranean Sea; Indian Ocean; Bay of Bengal ; 
Southern California. 
