We'll take that as a typo :-)
When I was a kid, I devoured "Juvenile Science Fiction", the memories of which are still vivid to me. My dad touted The Sea/20K Leagues to me, as that was his version of the genre. One year at the shore I read his actual copy. I eventually read the whole thing, but I may have stalled once or twice. The passage I remember in that regard is as follows:
From the daily notes kept by Mr. Conseil, I also retrieve certain fish from the genus Tetradon unique to these seas: southern puffers with red backs and white chests distinguished by three lengthwise rows of filaments, and jugfish, seven inches long, decked out in the brightest colors. Then, as specimens of other genera, blowfish resembling a dark brown egg, furrowed with white bands, and lacking tails; globefish, genuine porcupines of the sea, armed with stings and able to inflate themselves until they look like a pin cushion bristling with needles; seahorses common to every ocean; flying dragonfish with long snouts and highly distended pectoral fins shaped like wings, which enable them, if not to fly, at least to spring into the air; spatula–shaped paddlefish whose tails are covered with many scaly rings; snipefish with long jaws, excellent animals twenty–five centimeters long and gleaming with the most cheerful colors; bluish gray dragonets with wrinkled heads; myriads of leaping blennies with black stripes and long pectoral fins, gliding over the surface of the water with prodigious speed; delicious sailfish that can hoist their fins in a favorable current like so many unfurled sails; splendid nurseryfish on which nature has lavished yellow, azure, silver, and gold; yellow mackerel with wings made of filaments; bullheads forever spattered with mud, which make distinct hissing sounds; sea robins whose livers are thought to be poisonous; ladyfish that can flutter their eyelids; finally, archerfish with long, tubular snouts, real oceangoing flycatchers, armed with a rifle unforeseen by either Remington or Chassepot: it slays insects by shooting them with a simple drop of water.
I'm sure their are other such passages, but I choose to believe this is it. I think it was "the genus Tetradon" which transfixed me. Just now I expected to find a passage peppered with such nomenclature. Maybe it's there somewhere, but I think this was too much for me, anyway.
How about the very next paragraph?
From the eighty–ninth fish genus in Lacépède's system of classification, belonging to his second subclass of bony fish (characterized by gill covers and a bronchial membrane), I noted some scorpionfish whose heads are adorned with stings and which have only one dorsal fin; these animals are covered with small scales, or have none at all, depending on the subgenus to which they belong. The second subgenus gave us some Didactylus specimens three to four decimeters long, streaked with yellow, their heads having a phantasmagoric appearance. As for the first subgenus, it furnished several specimens of that bizarre fish aptly nicknamed "toadfish," whose big head is sometimes gouged with deep cavities, sometimes swollen with protuberances; bristling with stings and strewn with nodules, it sports hideously irregular horns; its body and tail are adorned with callosities; its stings can inflict dangerous injuries; it's repulsive and horrible.