WILLIAMS: CHASMODES TAXONOMY B. Maxillary length usually 13 to 16.5% SL (range 11-18.5%, X = 14.9%; Table 4); gill rakers modally 12 (Table 1); total number of small upper pharyngeal teeth 1-6 (Table 1) .... .................. .............. .......... bosquianus bosquianus (New York to Marineland, Florida). BB. Maxillary length usually 15.5 to 20% SL (range 14-22.5%, X = 17.3%; Table 4); gill rakers modally 11 (Table 1); total number of small upper pharyngeal teeth usually 0-1 in specimens over 40 mm SL, 2-5 in those under 40 mm SL (Table 1)................. ......................................... bosquianus longimaxilla new subspecies (Pensacola, Florida, to Veracruz, Mexico). --- uP AA B FIGURE 1.-Ventral aspect of lower jaw of Chasmodes bosquianus (A) and C. saburrae (B). Abbreviations are as follows: UP = upper lip, LF = lip flap, MD = mandibular pore (anterior and posterior pores are indicated on one side of the lower jaw), AP = space between the articular and preopercular bones, POP = preopercular pore. CHASMODES BOSQUIANUS (LACEPEDE 1800) (See individual subspecies for synonymy) DIAGNOSI-Chasmodes bosquianus is readily distinguished from C. saburrae in usually having 4 (vs. 6) mandibular pores (83% of specimens examined of each species have these counts; Fig. LA, B and Table 1). C. bosquianus typically lacks lip flaps, whereas C. saburrae has well- developed lip flaps (Fig. 1A, B). C. bosquianus can also be separated from C. saburrae by having 9-13 (vs. 12-14) gill rakers on the first arch (visible only upon dissection; Table 1). Dissected specimens of C. bosquianus have 4 enlarged canines on the lower pharyngeals, whereas C. saburrae has 6. STATISTICAL COMPARISONS.-Pairwise covariance comparisons were made between regression equations (Table 2) for males of each population of Chasmodes saburrae and males of each population of C. bosquianus, and the same was done for females of each population. The resulting maxillary length comparisons showed statistically significant (p<0.001)