. Bulletin of the British Museum (Natural History). THE IDENTIFICATION OF CEPHALOPOD â ' BEAKS 'â 437 The problems involved in distinguishing Sthenotenthis pteropus from Sthenoteuthis carolt are complex and, for the present. I have called the specimens caught in Madeira 5. pteropus and those caught elsewhere in the North Atlantic S. caroli (these are also caught at Madeira but specimens from this region were not considered here) These two groups differ in several respectsi and the names applied here may have. Fig. 7. Sthenoteuthu caroH. The relationships between various dimensions of the ower


. Bulletin of the British Museum (Natural History). THE IDENTIFICATION OF CEPHALOPOD â ' BEAKS 'â 437 The problems involved in distinguishing Sthenotenthis pteropus from Sthenoteuthis carolt are complex and, for the present. I have called the specimens caught in Madeira 5. pteropus and those caught elsewhere in the North Atlantic S. caroli (these are also caught at Madeira but specimens from this region were not considered here) These two groups differ in several respectsi and the names applied here may have. Fig. 7. Sthenoteuthu caroH. The relationships between various dimensions of the ower beak plotted on double logarithmic scales, i = rostral length " -hood eng h ; 3 = crest length ; 4 = wing length. The hnes have been c^alculated^ us^g the formula log v = m log ;tr + log c. ^ to be revised after further work. One of the differences between the species is in the size of the beak at the intermediate stage of darkening (Text-fig. 8). 2. Onychoteuthidae mSS °^ '^' ^""11^ represented m the collection are Andstroteuthis Uchtensteine, Moroteutlns ,v and Onychoteutlus banksi. In one specimen of Moroteuthis (weight 357 g. and lower rostral length o-5-i-o cm.) the wings of the lower beak were not ' A separate paper is in Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)


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