382 PRINCIPLES OF ANIMAL BIOLOGY 



Grew, Nehemiah (groo). English botanist, 1641-1712. 



Grouse (grous). One of several species of birds of the family Phasianidae, to which 



the quail, turkeys, ptarmigans, and prairie-chickens also belong. 

 Guanaco {gwah nah' ko). A llama-like animal of South America. 

 Gustatory {gus' ta to ri). Pertaining to the sense of taste. 



Habitat {hah' i tat). The kind of place in which an organism lives. 



Halysites {haV i si' teez). A genus of extinct chain-corals. 



Haploid {hap' laid). Single; referring to the reduced number of chromosomes in the 

 mature germ cells of bisexual animals. Cf. diploid. 



Haplozobn lineare {hap' lo zo' on lin' e a' re). A species of mesozoon forming a linear 

 aggregation. 



Harvey, William {har' vi). An English physician and physiologist who lived 1578- 

 1657. 



Head {bed). An enlarged anterior portion. In animals, the part visually containing 

 the principal nervous centers and sense organs. In a spermatozoon, the enlarged 

 part consisting mostly of the nucleus. 



Heidelberg {hi' del berg). A city in Germany near which the remains of a man-Uke 

 being (the Heidelberg man) were found. 



Heliotaxis {he' li o tak' sis). An orientation of an organism with reference to the 

 direction of light. 



Heliotropism {he' li of ro piz'^n). The response of an organism to the direction of light 



Heliozoa {he' li o zo' a). An order of rhizopod Protozoa. 



Helix {he' liks). A genus of snails. 



Helminthology {heV min thoV oji). The zoology of parasitic worms. 



Helodrilus fcetidus {he' lo dri' lus jet' i dus). A species of annelid worm found in 



manure heaps. 

 Hemoglobin {he' mo glo' bin) . A reddish protein contained in the red blood cells; 



also spelled haemoglobin. 



Herbivorous {her biv' o rus). Plant-eating. 



Heredity {he red' i ti). The occurrence, in offspring, of the same kinds of representa- 

 tives of physical and psychical traits as were in the parents. 



Hermaphrodite {her rnaf ro dite) . An organism possessing both male and female 

 organs. Also (adjective), possessing the organs of both sexes. 



Hermaphroditism {her maf ro di tiz'm). The state of being a hermaphrodite. 



Herpetology {her pe toV oji). The zoology of reptiles and Amphibia. 



Heteromita lens {hef er o mi' ta lenz'). A species of flagellate protozoon. 



Hetermorphes {hef er o mor' jeez). A group of animals in Blainville's early classifica- 

 tion; animals of irregular form, mainly sponges and Protozoa. 



Heterozygote {hel' er o zi' gote). An organism to which its two parents have con- 

 tributed unlike genes with respect to some inherited character, and which in 

 turn produces two kinds of germ cells with respect to that character. 



Heterozygous {hef er o zi' gus). Of the nature of a heterozygote. 



Hexactinellida {heks ak ti nel' li da). A class of Porifera (sponges) whose spicules are 



composed of siUca. 

 Hexagenia {heks' a je' ni a) . A genus of may-flies. The immature individuals are 



burrowing aquatic animals. 



