Evermann and Kendall Fish from Central Ecuador. 101 



distant from the front of anal but apparently representing the 7th ray 

 which is always present in the females and absent from the fin proper in 

 the males. These females contain ovaries with rather large but still im 

 mature ova. 



There are several young individuals in our collection. The smallest of 

 these is a trifle more than 1 inch in total length and has the dorsal fold 

 conspicuous and thin and the posterior dorsal spine not concealed but 

 comparatively long and spinuliferous. The color now is plain light 

 brown. 



TABLE OF PROPORTIONAL MEASUREMENTS OF SPECIMENS OF 

 Cyclopium cydopurn. 



* a. slightly longer ; 6. slightly shorter ; c. same length. 



The fin formulas are as follows : D. 7 (9 in No. 4) ; A. 6 in d\ 7 in 9 ', 

 P. 10 ; V. 5 ; C. 13 (11 in No. 8 and 12 in No. 9). 



SIZE AND DISTRIBUTION. 

 In the Riverside Natural History, page 114, it is stated that 



The five or six known species of Argidse reach a length of 2 or 3 inches 

 only, and inhabit the ponds and springs of the upper Andes on the Peru 

 vian or Pacific slope, where they take the place occupied by the Lorica- 

 riidse on the Atlantic side. 



In this statement there are two errors. First, regarding the 

 size ; the type of Arges sabalo was about 21 cm. or about 8.25 

 inches long, and Steindachner mentions examples 11 to 32 cm. 

 long (about 4.4 to nearly 13 inches) ; and Astroblepus grixalvii, 



