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Figure 4. — Holotype of Symphysanodon berryi (USNM 204086), a male, 115 mm. SL. 



DESCRIPTION 



Maxillary usually extending posteriorly to 

 beyond middle of eye. Length of upper jaw con- 

 tained in length of mandible 0.92 to 1.00 time. 

 Interorbital region flattened. No teeth apparent 

 on vomer, palatines, and pterygoids. Dentition 

 better developed and coarser in males than in 

 females. Serrae on vertical limb of preopercle 

 usually well developed ; horizontal limb with 

 fewer serrae (mostly near angle) or sometimes 

 almost smooth; usually a single spine (most 

 frequently serrate, often bifid) or spinelike 

 process at angle. Anterior part of snout without 

 scales; scales usually absent (or at least not 

 apparent) on gular region and branchiostegal 

 membranes ; on a very few specimens a number 

 of scales present in mid-line of anterior part of 

 gular region, on some others extremely small 

 scales may be embedded in this region; a few 

 specimens with a scale (rarely two) on mem- 

 brane between third and fourth branchiostegal 

 rays (rarely on membrane covering the third or 

 fourth branchiostegal ray). 



Counts 



Frequency distributions for the following 

 counts are given in tables 2, 3, and 4. Dorsal-fin 

 rays IX, 10 (VIII, 11 on one specimen and IX, 

 9 on one). Anal-fin rays III, 7. Pectoral-fin rays 

 16 to 18. Gill rakers 9 to 12 + 24 to 28— total 34 

 to 39. Pored lateral-line scales 48 to 52. Sum of 

 total number of gill rakers on anterior gill arch 

 plus number of pored lateral-line scales of indi- 

 vidual specimens 83 to 90. 



Measurements 



Ranges of selected measurements are pre- 



sented in percentage of standard length followed 

 by the value for the holotype of S. berryi in 

 parentheses. Length of head 30.7 to 36.0 (32.8). 

 Depth of head 20.1 to 23.3 (23.1). Length of 

 snout 6.2 to 8.9 (8.9). Horizontal diameter of 

 fleshy orbit 10.0 to 13.2 (10.0). Width of sub- 

 orbital 0.8 to 1.2 (1.1). Height of cheek 4.4 to 

 6.4 (5.7). Length of upper jaw 14.0 to 16.5 

 (14.6). Length of mandible 13.6 to 15.9 (14.2). 

 Width of bony interorbital 7.2 to 9.0 (8.0). 

 Depth of body 22.3 to 28.2 (26.1). Least depth 

 of caudal peduncle 9.5 to 11.8 (11.6). Pectoral 

 fin usually reaching a vertical through base of 

 first or second dorsal soft ray ; length of longer 

 pectoral fin 23.7 to 27.2 (24.4). Pelvic fin usually 

 not extending to vent in females; first pelvic 

 soft ray noticeably produced in males more than 

 ca. 85 mm. SL, increasing in length with in- 

 crease in SL, extremely filamentous in large 

 specimens ; medial branch of first pelvic soft ray 

 reaching past fork of caudal fin in some large 

 males. Length of longer pelvic fin ca. 20.3 to 

 >87 (ca. 54), varying in females from ca. 21.2 

 to 24.5 and in males from ca. 30.0 to >87 in 

 specimens more than ca. 85 mm. SL. Length of 

 base of anal fin 12.7 to 15.8 (14.9). Length of 

 depressed anal fin 22.8 to ca. 27.6 (25.1). 

 Lengths of dorsal spines: first 5.5 to 7.5 (6.7), 

 second 10.1 to 12.3 (11.4), third 14.0 to 16.5 

 (15.4), fourth 16.0 to 18.9 (16.7), longest 

 (fourth, fifth, or sixth — most frequently the 

 fourth or fifth) 16.0 to 18.9 (16.7), last ca. 12.3 

 to >15.7 (14.2). Lengths of anal spines: first 

 3.3 to 5.6 (4.3), second 9.9 to 13.4 (11.6), third 

 11.1 to 15.0 (12.6). Caudal fin deeply forked; 

 the upper and lower lobes produced into fila- 



REVISION OF THE GENUS SYMPHYSANODON 



339 



