DR. GtrNTHER ON THE FISHES OF CENTRAL AMERICA. 445 



Upper lip thick. The maxillary extends to the vertical from the anterior margin of 

 the eye. The interorbital space is convex. The anterior dorsal commences nearer to 

 the end of the snout than to the base of the caudal fin. 



This species, of which we have given a full description (1. c), occurs in rivers of both 

 sides of the Isthmus and of Guatemala. The specimens named Bajaus elongatits are 

 probably emaciated, caught after spawning-time. 



125. Agonostoma monticola (Bancroft). 

 This species, which is indigenous in Jamaica and Barbadoes, has been found by 

 M. Salle in Mexico ; and Messrs. Kner & Steindachner enumerate it in a collection 

 from Panama, where it is found in rivers of both sides of the Isthmus. Abhandl. bayer. 

 Ak. Wiss. 1865, p. 8. 



129. GOBIESOX RHODOSPILUS. 

 Giinth. Proc. Zool. Soc. 1864, p. 25. 



D. 6. A. 5. C. 8-9. P. 17. 



A vertical fold of the skin along the lower half of the base of the pectoral ; the 

 coracoid is scarcely below the level of the upper margin of the pectoral. The distance 

 of the origin of the dorsal fin from the caudal is contained twice and two-thirds in its 

 distance from the snout; the anal commences below the third dorsal ray. A very 

 narrow band of short conical teeth in the upper jaw — one of the lateral teeth being 

 somewhat larger than the others, recurved, canine-like. The lower jaw with a single 

 series of teeth, the anterior being narrow incisors, whilst the outermost on each side is 

 distinctly a canine tooth, corresponding to that in the upper jaw. Rose-coloured, with 

 dark-rose transverse spots, each spot having an edge of deep-red dots. 



Two specimens, 18 lines long, were collected by Capt. Dow at Panama. 



132. POMACENTKUS EECTIFK^NUM. 



A species from California and the western coast of Central America was described 

 by Mr. Gill under this name in the year 1862, and easily recognized by myself when 

 I gave an account of this genus in the fourth volume of my ' Fishes,' having received, 

 beside numerous examples from Panama and the Island of Cardon, a typical specimen 

 from the collection of the Smithsonian Institution. At the same time a specimen was 

 received from the same establishment, numbered as the other, but marked in the 

 accompanying list as Pomacentrus bairdii, another name proposed by Mr. Gill in the sam(^ 

 year (Proc. Ac. Nat. Sc. Philad. 1862, p. 149). It agreed perfectly with the descrip- 

 tion given there ; but as a comparison with our other examples of P. rectifrmimn did 

 not reveal distinctive specific characters, I did not hesitate to regard it not only as a 

 typical specimen of Mr. Gill's P. bairdii, but also as specifically identical witli recti- 

 frcemim ; about this I had no doubt. 



However, during the publication of my account of the Pomacentridce, Mr. Gill 

 kindly sent me a MS. communication on the same subject, in which he pointed out the 



