insertion of the pectoral fin and extends about equal distance above and below it. It has a thin saw-like snout, less than one third of the total length of body. The snout has a row of unserrated spines along the sides and two rows of shorter thorn-like spines on the underside near the sides all the way from the tip to the nasal openings. Nostrils are oval and surrounded by a narrow raised rim. The spines are very slightly curved and alternate long (5 to 7 mm) and short (2 to 3 mm), 47 or 48 spines on either side of the snout. There is a pair of barbels located on either side of the snout. The mouth itself is slightly arched. The upper jaw teeth are in 36 rows and the bottom jaw teeth are shaped similarly but in 32 rows. P. nudipinnis is within the same range as P. schroederi. The eyes are large in comparison to overall size, about two times the size horizontally compared to vertically. It is hard to establish any outrageous differences between the P. schroederi and other species of sawsharks, although the P. schroederi do tend to have a proportionately longer snout than other species. Notably longer than the snout of P. owenii and P. nudipinnis but only a little bit longer than that of P. cirratus. As for teeth (P. schroederi with 33 to 36 rows) is different from P. cirratus and P. japonicas with 39 to 56 rows. P. nudipinnis is within the same range as P. schroederi. Body It has no anal fin, but two dorsal fins approximately equal in size. The first dorsal fin originates about halfway from the tip of the snout to the tip of the caudal fin, the origin of the second dorsal fin is posterior to the tips of the pelvic fins. It has large pectoral fins, that's inner margins curve inward toward the base of the fins. There are dermal denticles on the dorsal surface of the body with very little overlapping. Fins are fully scaled but the snout is only partially covered. The ventral scales are usually leaf like with no accessory points or ridges. P. nudipinnis shows the largest difference in denticle structures. P. schroederi has typical denticles of the dorsal surface that are usually slender and leaf like, they bear a very long slender point directed up and back with two