An account of the Ophidium barbatum Linnei / by P.M. Augustus Broussonet ; communicated by Sir Joseph Banks.
- Pierre Marie Auguste Broussonet
- Date:
- 1781
Licence: Public Domain Mark
Credit: An account of the Ophidium barbatum Linnei / by P.M. Augustus Broussonet ; communicated by Sir Joseph Banks. Source: Wellcome Collection.
Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.
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![the lame point to the bafis of the peâoral, to its extremity ; and in the like manner for the ventral, anal,' and tail fins; ail winch meafnres I refer toi the common teim 40• AdmiLting Then the dorhü fin is diftant from the npper jaw as ten, I write as before LC t DI n 4*^ • vvhich 1 reduce, if I çhufe fo. Le. : DI 20 ; 5. - I take the meâfures in length only, and never in breadth or depth, becaufe fuch mealures, 011 many accounts, for inftance, from the quantity of fpawn, from that of food in the ventricle, &c. would be uncertain ; befides there aie terms enough aflorded by the fituation of the anus and the fins. I pay 110 regard to the meafure of the noflrils, of the eyes, &c. as thefe parts lie too near the extremity of the iipper ]aw to admit of a fufîicient accuracy in their meafuie. Ail thefe diftances are written in the fliortefl; manner poffible ; I therefore do not go into the inquiry what clafs of the lin- NÆAN fyflem the fifh deferibed -may belong to ; or whether the anal fin is before or behind the région of the dorfal ; whe- ther the pedloral are extended beyond the ventral ; or the tail is forked or not ; and many other particulars which could not be expreffed but by a very long defeription, tedious both to the writer and reader. = To make an application of the proportional meafurements, ï fuppofe a fifh, of a fpecies deferibed, tobe in length 40 lines, 'and from the npper jaw to the anus lo*. I take a fpecimen which I fufpea to be of the famé fpecies, but which I wifh to détermine wiîh certainty ; the length of it is 20 lines ; then I fay 40 is to 10 as 20 is to another term, which I difeover by mulîlplying 20 by 10, and dividing the piodudl by 4®» which v/ill produce 5, the number of the lines comprehended bç- tween the upper jaw and the anus, if the fifh be of the fpecies](https://iiif.wellcomecollection.org/image/b22463240_0010.jp2/full/800%2C/0/default.jpg)
