ig2 THE FIRST PRINCIPLES OF HEREDITY 



Sea-anemone (Gr. anemos, wind), a kind of polype living in wind 

 swept situations. 



Sea-squirt, a marine animal. 



Segmentation (L. secare, to cut), the act of cutting into parts. 



Segregation (L. se, apart ; grex, flock), separation into like parts. 



Seminal (L. semen, seed), pertaining to the seed. 



Soma, somatic (Gr.), body. 



Somatogenic (Gr. soma, body; genes, producing), arising in the 

 body (p. 96). 



Spermatophore (Gr. sperma, seed ; pheretn, to bear), the case 

 enclosing the spermatozoa in some invertebrates. 



Spermatozoon (Gr. sperma, seed ; zoon, animal), the male sex- 

 elements (p. 22). 



Sporulation (Gr. sporos, seed), the act of producing spores. 



Stamen (L. stare, stand), the male organs of the flower. 



Stirp (L. stirp, root) (p. 56). 



Telegony (Gr. tele, distance ; gonos, seed) (p, 86) . 



Testes (L. testis], the male sex-gland. 



Triton (Gr., a Greek marine god), a kind of newt. 



Trophoplasm (Gr. trophe, nourishment; plasma, form) (p. 57). 



Tunicata (L. tunica, a tunic), a class of animals covered with 



integuments, as sea-squirts, etc. 

 Type (Gr. typtein, to strike) (p. 154). 



Unicellular (L. unus, one; cellula, cell), one-celled. 

 Unilateral (L. unus, one; latus, side), one-sided. 



Vertebrata, vertebral (L. vertebra, a bone of the spine), back-boned 



animals. 



Vesicle (L. vesica), a bladder. 



Volvocinese (L. volvere, to roll), an order of fresh-water algae. 

 Volvox (L. volvere, to roll), a small genus of fresh-water algae. 

 Vorticella (L. vortex, a whirl), a kind of infusorian. 



Xenia (Gr. xenos, guest) (p. 87). 

 Zygote (Gr. zygon, yoke) (p. 124). 



