FAMILY BALISTIDAE — WOODS 105 



least depth of caudal peduncle 2.5 to 2.9; length of pectoral fin 

 2.3 to 3.0; length of longest dorsal ray 1.65 to 1.75; length of longest 

 anal ray 1.7 to 1.85; length of caudal fin 1.65 to 2.0; interorbital 

 width 2.15 to 2.45; all in length of head. Angle of snout profile 

 45 to 47 degrees, convex. 



Short shallow groove before eye below nostrils; interorbital flat 

 with slight median ridge, third dorsal spine well developed, scales 

 behind gill opening not enlarged or platelike; each scale with an 

 elongate slender median retrorse spine and a smaller spine on each 

 side; median or lateral spines may be bifurcate; caudal peduncle 

 spines no larger than those on other parts of body; pelvic spine not 

 moveable; caudal fin rounded; dorsal and anal fins high, rounded, 

 slightly elevated anteriorly. 



Color in alcohol. — Ground color of head and body light brown; 

 head with darker brown dots and body with darker brown interrupted 

 lines arranged in irregular lengthwise rows, some lines slightly bent 

 or wavy, others enlarged on one end, others oval dots; a ring of 

 small dots around orbit and on opercle, sometimes forming short 

 lines; spiny dorsal fin membrane dark brown to brownish black; 

 soft dorsal and anal fins uniform brown or with dark brown mem- 

 branes, lighter rays and distal margin pale; caudal fin membranes 

 blackish, upper and lower rays Ughter, distal margin pale. 



Remarks. — These specimens apparently belong to the species 

 shown both by Richardson and by Weber (/Sifto^a-Expeditie, vol. 

 57, pi. 10, fig. 14, 1913). We have compared those from the Marshall 

 Islands with specimens from Panama, Japan, the Philippines, and the 

 Indian Ocean, which bear a reticulated brown pattern and small 

 white spots (C. rotundatus (Proce)?), and find a constant difference 

 in the number of dorsal and anal fin rays (see table 131). It is not 

 possible for us, on the basis of specimens available in the U.S. National 

 Museum, to name the adult species of which C. senticosus is the 

 juvenile. 



Genus SUFFLAMEN Jordan 



Sufflamen Jordan, Copeia, no. 29, p. 27, 1916 (new name for Pachynathus Swain- 

 son, 1839, preoccupied; type species, Balistes capistratus Shaw). 



SUFFLAMEN CAPISTRATUS (Shaw) 



Plate 138,C 



Balistes capistratus Shaw, General zoology, vol. 5, p. 417, 1804 (based on "le 

 Baliste bride" of Lacepfede, Histoire naturcUe des poissons, vol. 1, pp. 335, 

 378, pi. 15, fig. 3, 1798; type locality, not given). 



SPECIMEN STUDIED 



USNM 139850, Marianas Islands, Rota Island, Nov. 15, 1945, D. G. Prey, 

 1 specimen, 183 mm. 



748-328--66 8 



