. Bulletin. Natural history; Natuurlijke historie. 78 PEABODY MUSEUM BULLETIN 43. Fig. 31. S. decoratus. Dorsal ridge scales of holotype specimen YPM 8957. Scale = 5 mm. 4th scale in the dorsal series (Fig. 31). This position corresponds to the first or second complete vertical scale row behind the cleithrum. There are some (probably 3) incomplete scale rows dorsal to the lateral line and anterior to the first large dorsal ridge scale. Following that there are about 5 robust scales, and then from about scales 11-18 the bases are flat and the elongated spines of each scale overlap the scale beh
. Bulletin. Natural history; Natuurlijke historie. 78 PEABODY MUSEUM BULLETIN 43. Fig. 31. S. decoratus. Dorsal ridge scales of holotype specimen YPM 8957. Scale = 5 mm. 4th scale in the dorsal series (Fig. 31). This position corresponds to the first or second complete vertical scale row behind the cleithrum. There are some (probably 3) incomplete scale rows dorsal to the lateral line and anterior to the first large dorsal ridge scale. Following that there are about 5 robust scales, and then from about scales 11-18 the bases are flat and the elongated spines of each scale overlap the scale behind. S. decoratus is an ordinary fusiform-shaped fish, with a caudal peduncle that is narrow even close to the anal fin (Fig. 27 B). It is slightly deeper bodied than S. greenwoodi and more slender than all other species of in the S. tenmceps group. Figure 29 (A, B) illustrates the diff^erence in form of this species relative to S. greenwoodi and S. fundus. The maximum depth of the caudal peduncle relative to both standard length and tail length is more slender than in all but S. greenwoodi. Ratio of head length to standard length is large compared with that of S. green- woodi, and the slope of the forehead is about 30-35° relative to horizontal. Mea- surements of overall body form are summarized in Table 28. There are 33-34 lateral line scales. The pelvic fin originates at the 8th-9th scale row, the anal fin originates at row 18-19, and the dorsal fin at row 20-21. The scales along the dorsal and ventral midline of the caudal peduncle are enlarged and form a series with the fulcra fringing the caudal fin. There are frequent intercalated scale rows (9 in YPM 8953) in the area dorsal to the lateral line and anterior to the dorsal fin, especially in the nape region, where the scales are very tiny. The flank scales are largest in the anterior flank region and decrease in size caudally, dorsally and ventrally. Both the dorsal and anal fins are fringed with 7-9 fulcra, 3 of which a
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