3(58 Tin: RKV. T. 11. K. STKlilUNG ON 



li)0(i. Talorchestia scutiyerula Htebl)in<r, Das Tien-eich, vol. xxi. 



p. r)44. 

 1912. „ „ Chilton, Tr. Roy. Soc. Ediiib. 



vol. xlviii. p. 508. 

 Mr. Vallentin reports this species as very common along the 

 shore at Htanley Harl)our', Nov. 20, 1898, and he obtained 

 numbers of smaller specimens from cast up Macroci/stis on 

 M.arch 21, 1902. One of the largest of these latter measured 

 13"5mm, in length, and is in good correspondence with Dana's 

 iigure from a Tierra del Fiiego specimen. But a larger s])ecimen 

 from Mr. Vallentin's eailier find measured 15 mm., and agrees 

 with Bate's figure, showing the shield at the back of the second 

 joint of the fifth persttopod rising above the animal's back, over 

 which the two bucklers meet. The difference in appearance 

 between the two forms is very considernble, but further- com- 

 parison sliows that it is due to the maturing of the single feature 

 to which it is confined. 



Gen. Hyalella S. I. Smith. 



1874. Hyalella S. I. Smith, Bep. U.S. Fish Comm. vol. ii. p. 645. 



1906. ,, Stebbing. Das Tien-eich, vol. xxi. jj. 574. 



1907. ,, Weckel, Pr. U.S. Mus. vol. xxxii. p. 54. 



1906. ,, Chevreux, L;ics des hauts plat. d'Amer. du Sud, 



p. 1 (extriiit, 1907). 



1910. „ AVeckel, Pr. U.S. Mus. vol. xxxviii. p. 623. 



1911. ,, Oitmann, Princeton Univ. Exp. Patagonia,, vol. iii. 



p. 650. 



HvALiCLLA PATAGONicus (Cunninghiim) Ortmann. 



1871. Allorchestes patagonicus Cunningham, Tr. Linn. Soc. 



l^ondon, vol. xvii. p. 498, pi. 59. fig. 4. 

 1888. Jli/aleUa j)atago)iicus Stebbing, Bep. Voy. 'Challenger,' 



vol. xxix. p. 404. 

 1911. Hyalella patagonica Ortmann, Princeton Univ. Exp. 



Patagonia, vol. iii. p. 650, pi. 48. fig. 3 a-h. 

 If the above identification could be proved to be erroneous by 

 comparison with Cunningham's original specimen, a change in the 

 recent specific name would become necessary on the ground of 

 preoccupation. As it stands the species has been amply described 

 as new by Dr. Ortmann, who also mentions its near relationship 

 to other species of the genus. In our specimens the sixth joint 

 of the fifth pertioopod is relatively longer than in Ortmann's 

 figure, and the third ui-opods agree not with his figure, but with 

 his text. Mr. Vallentin reports the " colour when alive very dark 

 brown, almost black." 



Localities. " In sand ground near old house, Port North, 

 10 Aug., 1910." Along with it were numerous specimens of the 

 little Copppod Boeckella michaelseni (Mrazek), of which Dr. Thomas 

 Scott, F.L.S., repoi'ts in the Ann. Nat. Hist. ser. 8, vol. viii. 

 1) 3, 1914, '* This species occurred in at least eight gatherings " 

 [28] 



