650 PATAGONIAN EXPEDITIONS: ZOOLOGY. 



CASSIDINA Milne-Edwards. 

 CASSIDINA EMARGINATA Milne-Edwards. 



1887 C. e. Pfeffer in: Jahrb. Hamburg. Wiss. Anstalt, v. 4, p. 103, pi. 2, 



f. 9, 10, pi. 5, f. 23-30, pi. 6, f. i-io. 



1891 C. e. Dollfus in : Miss. Cap Horn, v. 6, p. 67, pi. 8, f. 10. 

 1901 C. e. Stebbing in : Proc. Zool. Soc., p. 562. 



Localities. Punta Arenas, i J 1 ; Mouth of Santa Cruz River, 12 sp. 

 (J 1 and 9) ; San Julian, 7 sp. (& and 9). 



Distribution. Falkland Islands ; Tierra del Fuego ; Straits of Magel- 

 lan ; Channels of western Patagonia ; South Georgia ; Kerguelen Islands. 

 0-120 m. 



Family SEROLIDsE Dana. 



SEROLIS Leach. 

 SEROLIS PARADOXA (Fabricius). 



1884 S. p. Beddard in : Rep. Voy. Challenger, v. 1 1, p. 33, pi. 5, f. 12-14. 

 1891 S.p. Dollfus in : Miss. Cap Horn, v. 8, p. 61, pi. Sa t f. 4 (nee f. 5). 



Locality. Punta Arenas, 34 sp. 



Distribution. Falkland Islands ; Tierra del Fuego ; Straits of Magel- 

 lan. Shallow water. 



Remarks. On Dollfus' plate Sa, the figures 4 and 5 are transposed, 

 fig. 4 representing this species, while fig. 5 is S. schythei Ltk. (In the 

 explanation of the plate, p. 76, the opposite is stated.) 



Order AMPHIPODA. 



Family ORCHESTIID^E Dana. 



HYALELLA S. J. Smith. 

 HYALELLA PATAGONICA spec. hov. 



(Plate XLVIII, Figs. 3, a-h.) 



Localities. This species seems to be very abundant in southern Pata- 

 gonia. Hatcher has collected it at about 30-35 localities in the region 

 of the Rio Chico (47-50 S.), from near the coast to the Cordilleras 

 (highest altitudes : 1,750 and 2,000 feet). It is found in springs, small 

 streams and pools of fresh water, sometimes slightly alkaline (Arroyo Gio). 



