438 LECTURE XVIII. 



the Crustacea manifest a concentrated character of heart, as the 

 anellides showed a high character in the red colour of the blood. 



Other larvae, by the successive development of simple feet (pro- 

 legs) upon numerous segments, with aggregated ocelli on the head, 

 typify the myriapodous order, and then pass on to the simultaneous 

 acquisition of jointed legs and wings, and thus indicate the close and 

 essential affinity of the myriapods to the hexapod insects. Thus do 

 insects in their metamorphoses diversely typify a Divine archetypal 

 pattern. 



In the Coleoptera and Lepidoptera the general articulate type is 

 longer retained, and the particular one later acquired. In the He- 

 miptera and Orthoptera the morphological and histological changes 

 more rapidly and uninterruptedly effect the ascent from the common 

 to- the special form. Professor Burmeister, in his richly-stored 

 Manual of Entomology, translated by Mr. Schuckard, states that 

 " In insects with an imperfect metamorphosis there cannot con- 

 sequently be a passage through the earlier forms and grades of the 

 animal kingdom." (Shuckard's Translation, p. 423.) The conse- 

 quence here referred to appears to be, as far as I can understand the 

 author, a hypothetical necessity in Nature for a difference among 

 insects with respect to their metamorphosis ; but no insect, however 

 metamorphosed, passes through the forms and grades of the radiate 

 province. Commencing as a Hydatid, it quits the acrite sub-king- 

 dom by the analogy of the Entozoa, and its subsequent grades are 

 through the forms of the Articulata exclusively. No insect ever 

 is or resembles the ciliated Infusory, the Polype, or the Acalephe. 

 The insects with a so-called imperfect metamorphosis, contrary to 

 the statement of Burmeister, do pass through the earlier forms of 

 the articulate sub-kingdom, but more rapidly and uninterruptedly 

 than those in which the metamorphosis has been deemed more com- 

 plete. In these the worm-like insect or larva is active, and the crab- 

 like insect or pupa passive ; in those the larva is passive, and the 

 pupa active. 



If the different stages in the development of man were not hidden 

 in the dark recesses of the womb, but were manifested, as in insects, 

 by premature birth and the enjoyment of active Jife, with a limita- 

 tion of the developmental force to mere growth ; if the progress of 

 development was thus interrupted and completed at brief and remote 

 periods, with great rapidity, and during a partial suspension of active 

 life ; his metamorphoses would be scarcely less striking and exti'eme, 

 as they are not less real than those of the butterfly. 



As the insect must pass through the earlier forms of the Articulate, 

 80 must man thi-ough those of the Vertebrate, sub-kingdom. The 



