Fishes New to the Fauna of Porto Rico, etc. 23 



ual, not indicated in 4 individuals. No fleshy corrugations on anterior pro- 

 file in 4 individuals, indicated in 1 individual. Nostril small. A pigmented, 

 fleshy, tongue-like flap in roof of mouth. Upper teeth small, movable, in 

 semicircular series; teeth of lower jaw large and fixed, in a series rounded in 

 front and concave on sides. Length of caudal peduncle about 2.5 in head, 

 its depth 2.2 in head. Dorsal elevated and ending in a pointed tip behind. 

 Color uniform deep-black to uniform bluish-black, with indication of yellowish 

 tinge under scales; fins uniform black. 



Type, No. 3060, Zoological Museum, Princeton University. Length, 19 cm. 



Five individuals, 13 to 19 cm. long, from coral reef off Guanica Harbor. 



Named for Henry W. Fowler, in recognition of his contributions to ichthy- 

 ology. 



LABRID.^:. 

 Bodianus rufus (Linnseus). 



One specimen, about 15 cm. long, from coral reef off Guanica Harbor. 



Iridio maculipinna (Miiller and Troschel). 



Common on the coral reefs off Guanica Harbor. 



MONACANTfflD^. 



Pseudomonacanthus amphioxys (Cope). 



Three specimens from coral reef off Ballenas Point. 



GOBIID^. 

 Sicydium antillarum Ogilvie-Grant. 



Several specimens, 5 to 12 cm. long, obtained from mountain streams flow- 

 ing into the Arecibo River in the vicinity of Utuado. Only one specimen 

 corresponds to the description of the type; 12 other specimens of this genus 

 were obtained; these vary enough to indicate 6 different species. However, 

 careful comparisons would indicate that much of this variation is individual 

 and not specific. For example, microscopic examinations indicate that the 

 filamentous character of the spinous dorsal is sexual and not specific. Two 

 male specimens of what appeared to be *S. caguitce had the dorsal filaments, 

 while three females did not possess this character. The scales in the 12 

 individuals varied from 53 to 84. Young individuals show fewer scales than 

 older ones. 



Color in life varied from almost pure white to blue black. Mr. M. H. 

 Sanborn invited my attention to examples of this genus which were almost 

 pure white, found in small mountain streams flowing from caves. Several 

 specimens of this beautiful little fish, 2 to 3 inches in length, were observed 

 by the writer and one specimen was obtained. Observations would indicate 

 that this is a breeding female of possibly a new species. The morphological 

 characters, however, do not warrant making a new species until other indi- 

 viduals of both sexes can be obtained, as well as specimens taken at different 

 seasons of the year. 



Several individuals showing the color markings of S. plumieri were obtained. 

 They do not show the emarginate caudal nor the large number of scales. 

 They are probably the young of S. antillarum. 



The writer is of the opinion that S. vincente Jordan and Evermann is the 

 young of S. plumieri (Bloch). 



The fin rays and the vertebrae were constant in all specimens. 



Dorsal VII, 11. Anal 11. Vertebrse 26 = 10-|-16. 



