. Breviora. 18 BREVIORA No. 347 Vertebral column. Vertebrae 26 excluding hypural, 12 abdomi- nal and 14 caudal or 13 abdominal and 13 caudal. First vertebra (Fig. 10) with complete neural arch, three condylar facets, and associated pair of epipleural intermuscular bones, without trans- verse processes or ribs. A small element associated with the distal end of the rib of the second vertebra is probably the true first rib (Fig. 11). This element is characteristic of cyprinodontoids; in Oryzias melastigma it is unusually long. Rosen and Bailey (1963: 31) interpreted what is evidently the same ele
. Breviora. 18 BREVIORA No. 347 Vertebral column. Vertebrae 26 excluding hypural, 12 abdomi- nal and 14 caudal or 13 abdominal and 13 caudal. First vertebra (Fig. 10) with complete neural arch, three condylar facets, and associated pair of epipleural intermuscular bones, without trans- verse processes or ribs. A small element associated with the distal end of the rib of the second vertebra is probably the true first rib (Fig. 11). This element is characteristic of cyprinodontoids; in Oryzias melastigma it is unusually long. Rosen and Bailey (1963: 31) interpreted what is evidently the same element in Poeciliidae as a secondary postcleithrum. In Fluviphylax it lies in the body wall, and is separated from the pectoral girdle by the deep pocket internal to the pectoral fin base. Remaining abdominal vertebrae with large, stout transverse processes to which are attached proxi- mal tip of ribs, and simple epipleurals. In some specimens epi- pleurals fail to develop in association with posterior abdominal vertebrae. Caudal vertebrae lacking epipleurals. Haemal canals moderately large. Pectoral girdle (Fig. 11). Posttemporal bone forked, upper limb articulating with epiotic, lower with exoccipital (intercalar absent). Supracleithrum small, scalehke, interposed between post- temporal and cleithrum. Scapular foramen present. Cleithrum rather slender. Lower limb of coracoid slender, its anterior end extending to near anteroventral tip of cleithrum; space between cleithrum and coracoid large. Postcleithra absent. Pectoral radials four. Pectoral splint present, consisting of two very short, bony splints tightly adherent to dorsal surface of ray halves of uppermost pectoral ray. Pelvic girdle (Fig. 12). Distal tip of fifth rib ligamentously at- tached to dorsal surface of median pelvic projection. Posteriorly directed bony process of pelvic girdle very short, lacking in some specimens. ,rv PBP. Fig. 12. Ventral view of left pelvic girdle and fin rays, speci- men. PBP = po
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