An introduction to the study of natural history; in a series of lectures delivered in the hall of the College of physicians and surgeons, New York
Louis Agassiz
Paperback
(RareBooksClub.com, March 6, 2012)
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1847 Excerpt: ...instead of forming an independent division. So with others which helong to the disto.:na, which, as we have seen, undergoes many changes, hut is till the same animal. Then we have the Cpntir'i whioh r,or)iยปng,e not rea' wwiuo, Iiul oiiiy the sacs h which the actual worms ar. found. All the classifications ol them are yet to he changed--The class Nematoideaof Cuviei and the families Aconthocepha la and Erematod ea, which last contain the Distoma, must un dergo an entire reYolution asth; history of the animal hecome known. In fact, the whole classification of this type of the Animal Kingdom should he rewritten aDd made to accord with the results of recent investigation and discovery. LECTURE VIII. To Remaining Types f the Class of Worms Its Divisions or Families--The Apoda, or Fresh.water Wonns....The so.called Planaria: the Leech and irs Structure....Rudimentary Feet Respiratory Organs of this Class--External Gills, or Ramifications of the Blood.vessels in t iie fo,m of Stiff Hairs: the Dur.ihiaiich'iata... Another Group of Worms still mure complicated--the 'fuoui'ioia'tfAiafa.--Articulations of the Body and very complicated Gills The Singular and Interesting Metamorphoses of these Animals Disappearance of the Eye....These Animals when youog highly ph.isphor.scent....Experiments....The Class of Insect!--the moat numerous Class in the Animal Kiegdom--their Structure closely and extensively studied--Illustration of their Striking Phenomena Structure of their Kespiiatory Organs Srructuie of Wings The Order of t'olcovte. ra....Th.i Ortiptera....Tho Etmpteta. SttinpUra, Hcimpteraf Diptera and Apte:a Their Structural Peculiarities have given origin to the designato, y terms Sucturia and Mindihutata....The Metamorphoses of Insect....The Class of Crustacea, and...