OCR Text |
Show 1876.] MR. J. W. CLARK ON DELPHINUS ALBIROSTRIS. 687 The principal dimensions were as follows :- ft. in. Length, from anterior edge of upper lip to notch in middle of caudal fin 5 5| From upper lip to posterior edge of blow-hole (following curve) 0 11 From upper lip to anterior edge of dorsal fin (following curve) 2 6 From anterior edge of dorsal fin to notch in middle of caudal fin (following curve) 3 4 Length from upper lip to notch in middle of caudal fin (following curve) 5 10 Height of anterior edge of dorsal fin (following curve) .... 0 10| Total vertical height of the same 0 0 From upper lip to junction of anterior edge of pectoral fin with the body 1 2\ From tip of snout to navel (marked by a black V-shaped • spot ^ inch long) 2 6 From tip of snout to pudendal orifice 3 Of From tip of snout to anus 3 10 From upper lip to angle of mouth 0 7f From upper lip to anterior angle of eye . 0 \$\ Length of eye-aperture 0 Of From posterior angle of eye to ear-aperture 0 11 From angle of mouth to anterior angle of eye 0 1| Pectoral fin, length from junction of anterior edge with body to tip 1 0 Pectoral fin, from junction of posterior edge with body to tip 0 7f Pectoral fin, breadth at base 0 5 Pectoral fin, greatest breadth 0 4\ Breadth of caudal fin across the flukes 1 3 Vertical height of body, at the eye 0 8| „ „ ,, immediately behind the pectoral . . O i l „ „ ,, immediately in front of the dorsal fin 0 1 1| Width between the pectorals 0 5? Behind the dorsal fin the body becomes rapidly compressed, as will be seen from the accompanying figure. inches. At 8| inches behind the dorsal fin, the width was 5 At 16^ ,, „ ,, 2^ At 21^ ,, „ „ lg The vertical height at the first position was 8 inches, at the second 6| inches, and at the third 3^ inches. The line of the back sloped gradually to the caudal fin; the ventral line, at a point 10 inches distant from the central point of the fin, turned upwards rather abruptly and suddenly. The front part of the head was rounded between the eyes; but the upper lip was separated from this by a deep furrow on either side, and projected forwards exactly like the peak of a cap. The lip was 2 inches broad at its extreme anterior point, where the furrows are f inch apart, separated from each other by a ridge, and it narrowed gradually to a mouth. At a distanc ber oefa d1t h\ ionfc hh aflfr oam nt hien cthi p aotf the uapnpgelre loifp twheer e |