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. 

 1 89 1 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 d" ; Mouth of Santa Cruz River, 12 sp. 

 [<S' 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 SEROLID^ Dana. 



SEROLIS Leach. 



Serolis paradoxa (Fabricius). 



1884 S. p. Beddard in : Rep. Voy. Challenger, v. 11, p. 33, pi. 5, f. 12-14. 

 1891 S. p. Dollfus in : Miss. Cap Horn, v. 8, p. 61, pi. 8<7, f. 4 [nee f. 5). 



Locality. — Punta Arenas, 34 sp. 



Distribittion. — Falkland Islands ; Tierra del Fuego ; Straits of Magel- 

 lan. Shallow water. 



Remarks. — On Dollfus' plate 8<7, the figures 4 and 5 are transposed, 

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

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



Order AMPHIPODA. 

 Family ORCHESTIID^ Dana. 



HYALELLA S. J. Smith. 

 Hyalella patagonica spec. nov. 



(Plate XLVIII, Figs. 3, a-/?.) 



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). 



