150. lateral view of head 222 



151. dorsal and ventral views of skull 223 



152. posterior views of skull and orbit 224 



153. lateral and medial views of palatopteroquadrate region 224 



154. Acanthostracion quadricornis, 77.7 mm SL, Florida: lateral view of occipital region of skull and the fused 



firstfiveabdominal vertebrae; posterior view of fused first five abdominal vertebrae 224 



Acanthostracion quadricornis, composite based on several specimens, 58.2-350 mm SL, Gulf of Mexico 



and Caribbean: 



155. medial and lateral views of pectoral girdle 225 



156. ventral views of vertebral column from the fused first five abdominal vertebrae to the fourth caudal 



vertebra and of the basal pterygiophores of the anal fin 225 



157. dorsal view of branchial arches; lateral view of hyoid arch; lateral and dorsal views of urohyal 226 



158. lateral view of caudal fin supporting structures 226 



External features of other representative ostraciid genera: 



159. A, Rhinesomus bicaudalis, B and C, R. triqueter 227 



160. Lactophrys trigonus 227 



161. Lactoria fornasinii 227 



162. Tetrosomus gibbosus ■ 227 



163. Ostracion lentiginosum 227 



164. Rhynchostracion nasus and R. rhinorhynchus 227 



Number of teeth in upper and lower jaws in relation to standard length and the relatively negligible in- 

 crease in number of teeth with increasing standard length at sizes greater than about 40 mm SL: 



165. Lactophrys trigonus, Rhinesomus triqueter, R. bicaudalis 228 



166. Ostracion tuberculatus, O. lentiginosum, Acanthostracion quadricornis, A. polygonius 229 



167. /?/imesomustn(7ue(er, lateral view of entire specimen, 134 mm SL, Colombia 230 



168. Lactona cornuta, lateral view of entire specimen, 104 mm SL, Philippines 231 



169. Tetrosomus concatenatus, lateral view of entire specimen, 43.4 mm SL, Thailand 232 



170. Os(rac(on(Li6ercu/a(us, lateral view of entire specimen, 54.5 mm SL, Aldabra Atoll 233 



171. Rhinesomus triqueter, lateral view of head, 134 mm SL, Colombia 234 



172. Ostracion fu6ercu/atus, lateral view of head, 54.5 mm SL, Aldabra Atoll 234 



173. Tetrosomus concaferiatus, lateral view of head, 43.4 mm SL, Thailand 235 



174. Lactoria cornuta, ventral view of skull, 88.2 mm SL, Philippines 235 



175. Lactoria fornasinii, posterior view of orbit, 65.2 mm SL, Hawaii 236 



176. Rhynchostracion rhinorhynchus: ventral and dorsal views of skull, 88.2 mm SL, Java 237 



177. Lactoria cornuta, dorsal view of branchial arches; lateral view of hyoid arch and urohyal; 88.2 mm SL, 

 Philippines 238 



178. Hypothesized phylogenetic relationships ofthe genera of Ostraciidae 239 



179. Eolactoria sorbinii: lateral view of holotype, 15.5 mm SL, Eocene of Monte Bolca, Italy 242 



180. Body form in the only known Recent species of Triodontidae: Triodon macropterus 243 



Triodon macropterus: 



181. external features 244 



182. lateral view of entire specimen, 391 mm SL, Philippines 255 



183. lateral view of head, 391 mm SL, Philippines 256 



184. dorsalandlateral views of skull, 391 mm SL, Philippines 256 



185. posterior views ofskull and orbit, 391 mm SL, Philippines 257 



186. dorsal view of branchial arches; lateral view of hyoid arch; dorsal and lateral views of urohyal; 391 mm 



SL, Philippines 257 



187. lateral view of pectoral girdle, 391 mm SL, Philippines 258 



188. lateral view of scapula and first actinost in representatives of all superfamilies 258 



189. lateral views of alternate pleural ribs and their epipleurals; dorsal view of lower jaw; 391 mm SL, Phil- 



ippines 259 



190. lateral and dorsal views of rudimentary spiny dorsal fin and its basal pterygiophores, 463 mm SL, 



Japan 259 



191. ventral, dorsal, and lateral views of pelvis, 391 mm SL, Philippines 259 



192. lateralviewofcaudalfinsupportingstructures, 391 mm SL, Philippines 260 



193. Range of diversity in body form in the Recent Tetraodontidae: A, Lagocephalus spadiceus, B, Xenop- 

 terusnaritus;C, Amblyrhynchotes piosae; andD, Canthigaster rostrata 264 



194. Lagocephalus laeuigatus, with L. lunaris and L. sc/erafus for comparison: external features 266 



