OCT., 1907. FRESH-WATER FISHES MEEK. 143 



33 to 53 mm., the lateral band more prominent on females than on 

 males ; females with a dark band downward and backward from eye, 

 also a dark spot at base of pectoral; vertical fins unspotted; male 

 with small black spots on head and on nuchal region; vertical fins 

 profusely spotted. The small specimens have a very distinct lateral 

 blotch, otherwise they resemble the females. The differences in color 

 in the sexes of this species much resemble those in the sexes of Cichla- 

 soma dovii Gtinther of the great lakes of Nicaragua. Mr. Miller* has 

 incorrectly considered this species the same as Cichlasoma managuensis 

 Giinther, a certainly very different species. This species is close to 

 Cichlasoma fredr-ichsthalii Heckel, with which it has been identified by 

 Mr. Miller. 



El Rancho (12), 33 to 200 mm. 



Family Liogiiatliidse. 



Qerres peruvianus Cuv. & Val. 

 Caballo Blanco (3), 45 to 60 mm. 



Eucinostomus californiensis (Gill). 

 Caballo Blanco (3), 65 mm. 



Family Gobiiclse. 



Dormitator maculatus (Bloch). 

 Caballo Blanco (3), 38 to 45 mm. 



Philypnus maculatus (Gunther). GUAVINA. 



The dark lateral band on these specimens is more distinct than on 

 specimens from the easf side; anal fin usually with 10 rays, occa- 

 sionally 9. 



San Josd del Idolo (i), 190 mm.; Caballa Blanco (25), 45 to 

 120 mm. 



The following list is made up from four small collections from 

 Costa Rica sent to the Museum by Dr. Anastasio Alfaro, Director of 

 the National Museum of Costa Rica. With a few exceptions they are 



*Bull. Amer. Mus. Nat. Hist., 1907, 119. 



