644 PATAGONIAN EXPEDITIONS: ZOOLOGY. 



3. In the eyes, which are said to be reniform. 



L. aiigasi is still more closely allied to L. hatcJieri, as has been demon- 

 strated above, especially the caudal flap is almost identical. This close 

 relation of these two species is especially interesting from a zoogeographi- 

 cal point of view. 



Family BRANCHIPODIDJE Baird. 



BRANCHINECTA Verrill. 



Branchinecta granulosa Daday. 



(Plate XLVIII, Fig. 2.) 



1902 B. g. von Daday in : Term. Fiiz., v. 25, p. 288, pi. 13, f 3-14, pi. 

 14, f. I, 2. 



Localities. — Pools near Sierra Ventana, 1898. — 5 J*. Stat. 4, Pool 

 drying up, 10 miles above Sierra Ventana. — 6 J', 119. 5 miles above 

 Sierra Oveja. — Numerous cT and 9, poorly preserved. Pool, 25 miles 

 above Sierra Oveja, Febr. 21, 1899. — 5 (^,149. 



(All these localities are in the region of the Rio Chico, in about 49° S., 

 and 70-71° W.) 



Distyibidiou. — Swamp near Amenkelt (lower Santa Cruz River), 

 Patagonia (50° S., 69° W.). 



Description. — Allied to B. coloradense Packard (1883, p. 338, textfig. 

 19) from Colorado and (according to Lilljeborg) Fresno, California, and 

 still more closely to B. iheringi Lilljeborg (1891, p. 424, and v. Ihering, 

 1895, p. 178) from Rio Grande do Sul, Brazil. 



The chief differences are found in the male claspers (second antennae) 

 (fig. 2), which are very robust and long (extended, almost as long as the 

 anterior portion of the body). Basal joint subcylindrical, slightly curved, 

 with a distinct tubercle (knob) at the base on inner side. Inner margin 

 in the distal half with a prominent crest, the edge of which is finely 

 dentate. The inner margin of first joint, between this crest and the basal 

 knob, is concave. Second joint almost as long as the first, compressed 

 and lamelliform, and a little narrower than the first joint, with nearly 

 parallel margins ; slightly concave on under side (if this joint is stretched 

 out, the concave side is the outer side), curved, and near apex strongly 

 bent, where the margins form a distinct lobe on each side, rendering the 

 end of the second joint trilobate, the middle lobe being strongly deflected 

 from the general plane. 



