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XVI. — The Schizopoda, Stomatopoda, and non- Antarctic Isopoda of the Scottish 

 National Antarctic Expedition. By Walter M. Tattersall, D.Sc, Keeper 

 of the Manchester Museum, Communicated by Dr J. H. Ashvvorth. 

 (With One Plate.) 



(MS. received June 5, 1913. Read July 7, 1913. Issued separately November 18, 1913.) 



The present report deals with the whole of the Schizopoda and Stomatopoda in the 

 Scotia collections, and with those Isopoda which were taken in localities outside the limits 

 of Antarctica. I am indebted to the courtesy of Dr W. S. Bruce for the opportunity of 

 examining and reporting on these collections. The report on the Antarctic Isopoda is 

 being prepared by Mr T. V, Hodgson. 



I also include a few notes on a small collection of Schizopoda which were taken by 

 the Discovery on its outward journey to the South Pole, for the opportunity of examining 

 which I am indebted to the kindness of Dr W. T, Calman, of the British Museum. 

 These latter records are most appropriately included here along with those of the species 

 which the Scotia captured on her outward journey, over very nearly the same ground. A 

 comparison is thus possible between the captures of the two expeditions over the same 

 ground and in two different years, and may be brought out in the following lists : — 



Discovery. 

 Sept. and Oct. 1901. 



Siriella Thompsonii. 

 Thysanopoda tricuspidata. 

 Euphausia Krohnii. 



,, amev'icana. 



,, brevis. 



,, recurva. 



,, tenera. 



,, hemigibba. 



,, gibboides. 



,, lucens. 



„ longirostris. 



Thysanoessa gregaria. 

 Stylocheiron carinatum. 



No fewer than seven of the species are common to the two lists, and these represent 

 the most abundant species in the tropical Atlantic Ocean. 



TRANS. ROY. SOC. EDIN., VOL. XLIX. PART IV. (NO. 16). 118 



Scotia. 

 Nov. 1902-Jan. 1903. 



Siriella Thompsonii. 

 Thysanopoda tricuspidata. 

 Euphausia americana. 



,, brevis. 



,, tenera. 



,, hemigibba. 



,, pseudogibba. 



Thysanoessa gregaria. 

 Nematoscelis microps. 



