18 Proceedings of the Royal Physical Society. 
Isles (W. E. Clarke) and lat. 43° 33’ 8. (Bruce) seem to be the present 
known northern and southern limits. 
Family PHYSALIDA, Brandt, 1835. 
Genus Physalia, Lamarck, 1816. 
Physalia arethusa, Browne, 1756. 
Chun! distinguishes only two species of Physalia, the Atlantic- 
Mediterranean P. arethusa and the Indo-Pacific P. wutriculus, since the 
Innes, Il, 
numerous species previously described have either been discovered to be 
young specimens or slight local variations. Specimens were collected at 
the following stations :— 
suet) ek, I Wy ING DR DOr NY, Temp. 79° Dec. 4th, 1902. 
Stat. 81. 18° 24'S. 37°58’ W. Temp. 799° Dee. 20th, 1902. 
Stat. 478. Table Bay. May 1904. 
SHEN BA, WIL BAY INL, SAO? BIO! VAY, Temp. 781° June 19th, 1904. 
'C, Chun, Die Siphonophoren der Plankton-Expedition, Kiel and Leipzig (1897). 
