154 PROCEEDINGS OF THE ACADEMY OF [April, 



40. Leiostomus xanthurus Lacepede. 45. B. carolinensis Gmelin. 



"Spot." 46. Monacanthus hispidus (Linne). 



Useppa Island. 47. Spheroides hnrperi Nichols. 



*41. Chcetodipterus faber (Broussonet). 48. Lactophrys tricornis (Linne). 



*42. Pomacanthus arcuatus (Linne). 49. Chilomycteriis schoepfi (Walbaum). 



*43. Angelichthys ciliaris (Linne). 50. Opsanus tau (Linne). 

 44. Balisles vetula Linne. Biscayne Bay. 



5L Rhombochirus osteochir (Cuvier). 



Head 4^; depth 8; D. XVIII— iii, 22; A. iii, 22; P. I, 22; snout 2| 

 in head measured from upper jaw tip; eye 7; maxillary 3; inter- 

 orbital 1 1. Body slender in profile, depressed in front and moderately 

 elongate, slender caudal peduncle compressed. Head width about 

 Ij its length. Snout broad, half long as wide. Eye small, high, 

 hind pupil edge about midway in head length. Mouth broad, gape 

 about half way to eye. Maxillary ends before eye slightly less than 

 eye diameter. Upper teeth in 3 rows, inner largest, well spaced and 

 fewest, median irregular, and very minute outer close-set, even, 

 simple, conic, forming lashed or ribbed appearance, especially along 

 each side of jaw within mouth. Outer upper teeth also extend on 

 premaxillary, followed by 4 or 5 large well-spaced teeth on maxillary 

 edge. Band of fine teeth in lower jaw, most pronounced on sides 

 of jaw anteriorly but not evident posteriorly or at symphysis so 

 none extend back beyond fine teeth on premaxillary. Broad band 

 of minute vomerine teeth edged in front and anteriorly with row 

 of larger teeth. Tongue narrow, free in front and covered with fine 

 teeth. Gill-opening extends forward about opposite maxillary tip. 

 Rakers i, 1+9 iii, lanceolate, about half length of filaments. Skin 

 smooth, apparently scaleless. Disk width about 2j its length, which 

 2 1 from snout tip to caudal base, laminae quite spinescent. Dorsal 

 origin midway between twelfth disk lamina and caudal base, fin 

 elevated from first dorsal ray. Anal inserted very slightly behind 

 dorsal origin, similar. Caudal If in head, hind edge concave and 

 lobes convex, though lower slightly longer. Pectoral rhomboid, 

 rays very rigid or stiff, fin rhomboid. If in head. Ventral inserted 

 directly behind pectoral base, 2j in head. Color when fresh in 

 alcohol largely pale to whitish on disk and variably over upper left 

 side, including eye and most of pectoral. Pale area also gives off 

 pale line down to vent and inside gill-opening. Iris whitish with 

 pale yellowish tint. Though left pectoral largely white, except gray 

 border, and basal Ijlotch, right pectoral dull purplish-brown with 

 pale inferior blotch. Dorsal and anal slaty-black or nearly whitish 

 narrowly along bases. Caudal dusky to blackish medially, lower 



