GLOSSARY 



OF TECHNICAL TERMS EMPLOYED IN THIS TREATISE. 



ABIOGENESIS. Gr. a, without ; bios, life. The doctrine of de novo or spontaneous 

 generation, assuming that living bodies may be evolved from inorganic matter without 

 the interposition of a parent. 



ACETABULIFORM. Lat. acetabulum, a cup or sucker ; forma, form. Having a cup- or 

 sucker-shaped outline. 



ADORAL. Lat. ad, to ; os, arts, the mouth. The fringe of cilia conducting to the oral 



aperture of many Infusoria. 



AFFERENT. Lat. ad, to ; fero, I carry. Conveying from the surface towards the centre. 

 AMCEBIFORM. Amceba ; forma, shape. Resembling an Amoeba. 

 AMORPHOUS. Gr. a, without ; morphe, shape. Having no definite form or structure. 



AMPHIBLASTULA. Gr. amphi, on both sides ; blastos, germ. Term proposed by Haeckel 

 for that modification of the so-called ciliated sponge-larva in which its respective 

 poles are composed of dissimilar cellular elements. 



AMPULLACEOUS-SACS. Lat. ampulla, a bottle. Name applied by Mr. Carter to the 

 hollow ciliated or monad-lined chambers of many sponges. 



AMYLACEOUS. Gr. amulon, starch. Having a starch-like consistence. 



ANALOGOUS. Gr. ana, similar to ; logos, ratio. Applied to parts performing similar func- 

 tions but having a different nature, as the wing of a bird and the wing of a butterfly. 



ANTHEROZOIDS. Gr. anthos, a flower ; zoon, an animal. The flagelliferous locomotive 

 elements in cryptogamic plants which are the homologues of the spermatozoa of 

 animals. 



ARCHEGASTRULA (Haeckel). Gr. arche, beginning ; gastrula. Hypothetical primaeval 

 gastrula-like organism (see GASTRULA), out of which, by the process of evolution, the 

 entire Metazoic animal series is supposed to have been gradually developed. Such 

 an architype Haeckel announced the discovery of in the genus Haliphysema, vol. i. 

 p. 1 60 et seq. 



ARCHENTERON. Gr. archos, chief ; enter on, intestine. The primitive alimentary tract as 

 developed in the Metazoic embryo. 



ARCHITYPE. Gr. arche, beginning ; tupos, image. The original or ancestral type of a 

 race or species. 



ATROPHIED. Gr. a, without ; trophe, nourishment. A condition of being wasted away 

 through defective nourishment. 



BACILLAR. Lat. bacillum, a small staff or rod. Having a rod- or staff-like contour. 



BIFLAGELLATE. Lat. bis, twice ; flagellum, whip. Having two whip-like appendages or 

 flagella. 



BILABIATE. Lat. bis, double ; labium, lip. Having the appearance of possessing two 

 lips. 



BIOGENESIS. Gr. bios, life ; genesis, origin. The doctrine that all life springs from 

 antecedent life. 



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