Similarly, threads unite the cells of the colonial plant—Flagellate Volvox, passing through the thick gelatinous cell-wall (pp. [126-127], Fig. 44).
Pigments soluble in the ordinary solvents of fats, such as ether, benzol, chloroform, etc.
We have ourselves had hard work to persuade intelligent men of fair general education, even belonging to a learned profession, that this is not the case.
Dr. H. Charlton Bastian has recently maintained a contrary thesis (The Nature and Origin of Living Matter, 1905), but has adduced no evidence likely to convince any one familiar with the continuous life-study of the lower organisms.
The terms "organoid," "organella," have been introduced to designate a definite portion of a Protist specialised for a definite function; the term "organ" being reserved for a similarly specialised group of cells or tissues in a Metazoon or Metaphyte. We do not consider that this distinction warrants the introduction of new words into the terminology of general Zoology, however convenient these may be in an essay on the particular question involved.