NO. 21.33. FISHES TAKEN BY "ALBATROSS," 1888— THOMPSON. 403 



For convenience and also because in the case of the present collec- 

 tion it is the most natural method, the collection has been divided 

 into three parts, namely: (1) Those from the east coast; (2) those 

 from the west coast, including the Straits of Magellan and extending 

 as far north as 46° 45' south latitude; and (3) those to the northward 

 of this. There are but few species found on both the western and 

 eastern coasts, although certain species of the Straits of Magellan 

 are found to extend to both coasts. These straits are really parts 

 of the waterways which break up the western coast lino and, in the 

 present case at least, no sharp line can be drawn separating their 

 famias. As a matter of convenience the west coast forms have been 

 treated in two divisions, simply because there are none of the species 

 treated to be found in both of them, and the principal collections to 

 the northward were made at a considerable distance beyond the 

 dividing line adopted. 



The following species are described as new: 



Idiacanthus retrodorsalis. Notothenia latifrons. 



Agonopsis asperoculis. Notothenia jordani. 



Notothenia longicauda. Symphurus hergi. 



Notothenia gilherti. Laemonema muUiradiata. 



Under the joint authorship of Gilbert and Thompson the following 

 are described: 



Coryphaenoides ariommus. Coelorhynchus patagoniae. 



Nezumia pudens. Coelorhynchus chilensis. 



I. THE EAST COAST. 



List of species collected: 



RAJIDAE. 



1. Psammobatls rudis Giiuther. Stations 2768 and 2770. 



ENGRAULIDAE. 



2. Lycengraulis grossidens (Cuvier) Agassiz. Montevideo and Buenos Aires. 



CLUPEIDAE. 



3. Chipea arcuata Jenyns. Montevideo. 



4. Brevoortia tyrannus (Latrobe). Montevideo. 



5. Ilisha flavipinnis (Valenciennes). Buenoa Aires. 



CHARACIDAE. 



6. Astyanax rutilus Jenyns. Montevideo. 



7. Acestrorhamphus hepsetus {QiVLwier:) . Buenos Aires. 



ATHERINIDAE. 



8. Menidia honariensis Cuvier and Valenciennes. Buenos Aires. 



SCIAENIDAE. 



9. Sciaena adusta (Agasaiz). Montevideo. 



