. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. SWIMBLADDER STRUCTURE OF DEEP-SEA FISHES IN RELATION TO THEIR SYSTEMATICS AND BIOLOGY By N. B. Marshall British Museum (Natural History) (Plates I—III, Text-figures 1-47) " When one picks up a fish, one may be said, allegorically, to hold one of the knots in an endless web of netting, of which the countless other knots represent other facts, whether of marine chemistry, physics or geology, or other animals and plants. And just as one cannot make a fish-net until one has tied all the knots i
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. SWIMBLADDER STRUCTURE OF DEEP-SEA FISHES IN RELATION TO THEIR SYSTEMATICS AND BIOLOGY By N. B. Marshall British Museum (Natural History) (Plates I—III, Text-figures 1-47) " When one picks up a fish, one may be said, allegorically, to hold one of the knots in an endless web of netting, of which the countless other knots represent other facts, whether of marine chemistry, physics or geology, or other animals and plants. And just as one cannot make a fish-net until one has tied all the knots in their proper positions, so one cannot hope to comprehend this web until one can see its inter- nodes in their true ; bigelow (icno) INTRODUCTION IN both structure and function the teleost swimbladder is one of the most plastic of vertebrate organs. While it is primarily a hydrostatic organ, making a fish weightless in water, it may also be modified for respiratory, sensory and sound-producing activities (Jones and Marshall, 1953). Apart from the respiratory aspect, this statement is equally true of many deep-sea fishes. And the exception is understandable, for the use of the swimbladder as a lung is obviously limited to physostomatous teleosts, those with a pneumatic duct joining the sac to the foregut. Virtually all deep-sea fishes have a completely closed (physoclistous)1 swimbladder. Cuvier and Valenciennes (1848) appear to have been the first to discover a swimbladder in a deep- sea fish. Concerning the salmonoid genus Argentina, Valenciennes wrote as follows: 'La vessie natatoire de l'Argentine a un autre caractere anatomique et physiologique fort interessant pour nos etudes; elle ne communique pas avec le canal digestif; je n'ai pu du moins trouver de conduit pneu- matique dans les trois individus d'especes differentes que j'ai disseques et dont les visceres etaient cependant parfaitement conserves.' (In the following volume (1850) they record the pr
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