Siphonophora of Scottish National Antarctic Expedition. 77 



Scotia Collections Siphonophora of the Scottish National 

 Antarctic Expedition. I!y J. H. Koeppern, Xoological Depart- 

 ment, University of Edinburgh. 



(Received 13tli December 1912. Read 16tli !><,, iih.T 1912.) 



THE Siplioiiophora collected by the Scottish National Antarctic Expedition 

 (1902-1904) were kindly entrusted to me for examination by Dr W. S. 

 Bruce, to whom my thanks are also due for the loan of literature and 

 charts, and for the permission to reproduce three photographs previously 

 published in the Zoological Log of the expedition. I am grateful to Dr 

 J. H. Ashworth for various suggestions during the course of my work. 



The notorious difficulty of satisfactorily preserving such fragile forms of 

 animal life has made the specific determination of a few of the specimens 

 somewhat difficult. Some of the Physalia' and Velella', however, are 

 excellently preserved in formalin. 



The structures described by Professor J. Arthur Thomson 1 as separated 

 gouostyles of " Scotia " Siphonophora from the South Orkneys, probably 

 belong to the species Mi/riotheca austrogeorgia? whereas the detached 

 tentacles referred to the Siphonophora by Dr J. Rennie 3 must be considered 

 as parts of Desmonema* 



Family PORPITIDjE, Brandt, 1835. 



( It-nils Porpita, Lamarck, ISl'i. 

 Porpita umbella, O. F. Miiller, 1776. 



Eleven specimens referable to this species were collected from shore 

 pools at Scotia Bay, South Orkneys, 2nd February 1904, the temperature 

 being a little below freezing-point. Their diameters in the preserved state 

 range from 7 to 12 mm. This is the most southern station from 

 which the species has been recorded. 



The macerated pneumatophore of a Porpitid, with a diameter of 3 mm., 

 was caught in the tow-net at the surface, at Station 30, 11 15' N., 25 C 

 20' W., temp. 79 F. Small isolated tentacles closely resembling those of 

 the Scotia Bay Porpita' were preserved along with some Velelhe from 

 Station 53, St Paul Rocks. 



1 Proc. Roy. Phys. S<: Kilinljiinjh, vol. xvi. (1904), pp. 19-22, 1 pi. 



-' J. Ritchie, "Supplementary Report on the Hydroids of tin- Srotti.-h National Antarctic- 

 Expedition," Trim*, llmj. ,SV. /-,',/. (1909), vol. xlvii., pt. i., No. 1, ].. i;;i 



3 Proc. Roy. /%--. Soc. !:<!., vol. xvi. (1004), pp. -2'>--21, 1 pi. 



4 E. T. Browne, " Medus;r," National Antarctic Expedition (1910), v., p. :>i. 



(HEPIUXTED FIIOM THI: IMIOCKEIHXIIS OF nir. IIOYAI. I-HYSHAI. MU-IMY, vm. \i\.. IT. It! _'].) 



