第一,鯨類學(xué)這門(mén)科學(xué)之未定未決的情形,正是有待于事實(shí)證明的首當(dāng)其沖的問(wèn)題,在某些方面說(shuō)來(lái),它還有一個(gè)爭(zhēng)議未決的問(wèn)題,那就是大鯨究竟是不是魚(yú)。林尼厄斯在寫(xiě)于一七七六年的《自然之體系》一書(shū)中說(shuō),"這里我要把鯨與魚(yú)區(qū)別開(kāi)來(lái)。"不過(guò),就我所知,我知道直至一八五○年,鯊魚(yú)和鯡魚(yú),?魚(yú)和青魚(yú),卻與林尼厄斯所發(fā)表的見(jiàn)解相反,仍然是跟大海獸共海而分處的。
The grounds upon which Linnaeus would fain have banished the whales from the waters, hestates as follows: "On account of their warm bilocular heart, their lungs, their movable eyelids,their hollow ears, penem intrantem feminam mammis lactantem," and finally, "ex lege naturaejure meritoque." I submitted all this to my friends Simeon Macey and Charley Coffin, ofNantucket, both messmates of mine in a certain voyage, and they united in the opinion thatthe reasons set forth were altogether insufficient. Charley profanely hinted they were humbug.
林尼厄斯之所以要把鯨從海里放逐出去的根據(jù),是這樣的,他說(shuō):"鑒于它們有溫暖的雙心室的心臟,有肺,有能活動(dòng)的眼皮,有內(nèi)凹的耳朵,而且,雌性又有乳房,從自然規(guī)律說(shuō)來(lái),當(dāng)然應(yīng)該區(qū)別于一般魚(yú)類。"在某次航行中,我碰到了兩個(gè)餐友,就是南塔開(kāi)特人西米恩。麥賽和查利??品?我把這一切向他們請(qǐng)教,他們都一致認(rèn)為,上面所提的理由是完全不充足的。查利還不敬地把他們稱為吹牛家咧。
Be it known that, waiving all argument, I take the good old fashioned ground that the whale isa fish, and call upon holy Jonah to back me. This fundamental thing settled, the next point is,in what internal respect does the whale differ from other fish. Above, Linnaeus has given youthose items. But in brief they are these: lungs and warm blood; whereas, all other fish arelungless and cold blooded.
其實(shí),我寧愿放棄一切爭(zhēng)論,堅(jiān)持老式的立場(chǎng),宣稱鯨是魚(yú),并且請(qǐng)神圣的約拿來(lái)支持我。這一基本之點(diǎn)已告解決,其次,就來(lái)研究鯨具有什么與其他魚(yú)類不同的內(nèi)部特征。關(guān)于這,林尼厄斯已在上面把這些要點(diǎn)提出來(lái)了。簡(jiǎn)略地說(shuō),這些特征就是:有肺,有熱血;反之,其他魚(yú)類卻是沒(méi)有肺而且是冷血的。