638 PATAGONIAN EXPEDITIONS : ZOOLOGY. 



BALANUS da Costa. 

 BALANUS L/EVIS Bruguiere. 



1854 B. I., Darwin, Mon. Cirr. Bal., p. 227, pi. 4, f. 2. 

 1897 B. /., Weltner in: Arch. f. Naturg., v. i, p. 263. 



Locality. Punta Arenas, numerous specimens. 



Distribution. Tierra del Fuego and Straits of Magellan ; Chili ; Peru ; 

 California. On the Atlantic coast of South America northward to Rio 

 Grande do Sul, South Brazil. 0-20 fathoms. 



Remarks. All our specimens represent the typical variety of this 

 species. 



Order COPEPODA. 



Family CENTROPAGID^E Giesbrecht. 

 PSEUDOBOECKELLA Mrazek. 



The original genus Boeckella of Guerne and Richard (1889, p. 151), 

 created for the preoccupied Boeckia of Thomson (1883) was divided by 

 Mrazek (1901) and von Daday (1902) into several genera. Of course, 

 Mrazek's names have the priority. Unfortunately both divisions do not 

 completely agree, and the names chosen by either author are apt to give 

 origin to confusion. Generally, we may say that Pseudoboeckella of 

 Mrazek corresponds to Boeckella of v. Daday, and vice versa, although 

 Mrazek puts B. bergi Rich, into a separate genus (Boeckellopsis], while it 

 is included in v. Daday's Pseudoboeckella; and although B. brevicauda 

 Brad., which is included in v. Daday's Boeckella, forms the genus Para- 

 boeckella of Mrazek. 



The two species mentioned here have been described by v. Daday under 

 Boeckella (sens, strict.), and seem to belong to Pseudoboeckella of Mrazek. 



PSEUDOBOECKELLA LONGICAUDA (Daday). 



1901 Boeckella /., v. Daday in: Term. Fiiz., v. 24, p. 346. 

 19022?. /., v. Daday, ibid., v. 25, p. 243, pi. 6, f. 10-14, 16. 

 Localities. Stat. 2 2 J 1 about 25 $ 



Stat. 6 2 $ 



Stat. 34 i 9 



