10. The Fishes of the Juan Fernandez Islands. 



By  ■' 



HIALMAR RENDAHL. . 



The material for this paper was collected by Mr. K. Backstrom during 

 the Swedish Pacific Expedition 1916 — 17, under the direction of Dr. C. Skotts- 

 BERG. Unfortunately, the largest part of the collection of fishes from Juan 

 Fernandez was lost while stored in Valparaiso. The remaining species — all 

 of them collected at Masatierra — represent, however, as will be seen below 

 a rather large part of the species known from the coasts of this island. 



The pioneer work on Chilean Ichthyology was done by Mr. C. Gay and 

 in the ichthyological part of his great work »Historia fisica y politica de Chile» 

 (Zoologia. Tome II, Paris 1848) we have the most complete review of the Chile- 

 an fish fauna hitherto published. A part of the fishes dealt with in Gay's 

 work, had previously been described by CuviER and Valenciennes (Hist. 

 Nat. des Poiss.) on material brought home by Gay. This work also is funda- 

 mental for our knowledge of the fishes of Juan Fernandez. 



The next paper of importance for the ichthyology of the island is SXEIN- 

 dacher's »Ichtyologische Beitrage II», the first part of which deals with »Die 

 Fische von Juan Fernandez in den Sammlungen des Wiener Museums* (publish- 

 ed 1875 in Sitz. Ber. Akad. Wien. Bd. LXXI, part. I). 



The Challenger-Expedition brought together a small collection of fish in 

 the waters at Juan Fernandez, which was worked out by GUNTHER in the 

 Challenger Report, Zoology, Vol. I, part. VI, 1880, p. 23. 



In the years 1898—99 Delfin published in the Revista Chil. De Hist. 

 Nat. a list of the Chilean fishes, entitled »Catalogo de los Peces de Chile*. 

 This catalogue is only an enumeration of species already described ; it is, how- 

 ever, valuable for literature references and statements concerning localities 

 where specimens in the Valparaiso Museum had been collected. 



On his expedition to Chile Dr. Plate also visited Juan Fernandez and 

 brought together a collection of fishes. SteindacHNER has reported upon 

 these in his paper »Die Fische der Sammlung Plate» (Fauna Chilensis. Zool. 

 Jahrb. Suppl. IV, 1898, p. 281. »Nachtrag», ibidem, 1903, p. 201). 



The number of species known from the Juan Fernandez Islands !s 40 

 (some uncertain species not counted). In the list below the species apparently 

 endemic in the waters of the island are marked with an asterisk. 



4 — 20184. The Nal. Hist, of Juan Fernandez and Easter Isl. Vol. III. 



