CICHLOSOMA. 27 



Barbados respectively, two from Western Ecuador, C.festoe and C. ornatum, allied to 

 C. urophtludmus or C. istlanum, and two, C. kraussi from Colombia and C. spectahile 

 from the Amazon, more specialized than any in the great protractility of the mouth 

 and apparently allied to C. managuense. 



Synopsis of the Mexican and Central- American Species. 



I. D. XV-XVI 10-13. A. V 7-10. Pectoral |-| the length of the head. Prfemaxillary spinas 



I to "5 the length of head, extending to above anterior part of eye ; maxillary not extending 

 to below the eye ; canines moderate. 



A. Snout nearly as long as the postorbital part of head (in the adult) ; caudal peduncle as 



long as deep. 



1. Length of head 2| (young) to 3 (adult) in the length of the fish; jaws equal anteriorly. 

 Interorbital width 3^ to 3^ in the length of head. A dark spot below the origin 



of the lateral line, another on the middle of the side, a third at the base 



of caudal 41. isilamim. 



Interorbital width 4 in the length of head. An interrupted dark longitudinal 



band from operculum to the base of caudal 42. steindachneri. 



2. Length of head 2^ (young) to 2f (adult) in the length of the fish ; 



lower jaw slightly projecting ; coloration as in C. steindachneri . 43. bartoni. 



B. Snout shorter than the postorbital part of head (in the adult). 

 Depth of body 2 to 2^ in the length ; caudal peduncle f as long as deep ; lower 



jaw slightly projecting 44. beani. 



Depth of body 2^ to 2f in the length ; caudal peduncle as long as deep ; lower 



jaw projecting 45. mento. 



II. D. XV-XVII 10-12. A. VI 8-9. Pectoral % to % the length of head. 



Prffimaxillary spines nearly \ the length of head, not extending to 

 above middle of eye ; maxillary extending to the vertical from anterior 

 margin of eye ; canines moderate 46. urophthahnus. 



III. D. XVI-XVIII 9-12. A. VI-IX 7-10. Prajmaxillary spines | or slightly more than j, 

 the length of head, extending to above the middle of orbit ; maxillary extending to below 

 anterior margin or anterior ^ of eye ; canines strong. 



A. Last dorsal spine f to -i- the length of head. D. XVI-XVII 9-12. 

 Snout shorter than postorbital part of head (in the adult). A. VI-VIIl 8-9. 



A dark spot above the origin of the lateral line, another on the middle 



of the side, a third at the base of the caudal 47. trimactdatum. 



Snoiit as long as postorbital part of head (in the adult). A. VIII-IX 7-9. 



An interrupted longitudinal band from eye to base of caudal .... 48. salvini. 



B. Last dorsal spine | the length of head. D. XVIII 10. A. VII- 



VIII 8-9 49. multifasciatum. 



C. Last dorsal spine i the length of head. D. XVII-XVIII 9-11. A. VII-VIII 8-9. 

 Depth of prfeorbital \ to § the diameter of eye (in specimens of 120 to 130 mm. 



in total length) ; caudal peduncle | as long as deep 50. friedrichstahli. 



E2 



