62 GLOSSARY. 



Hepa'tic (Gr. hcpar, hepatos, the liver). Relating to the liver, 

 as the hepatic artery which conveys blood to the liver. 



Her'nia (Gr. hernos, a branch). The abnormal descent of part 

 of the intestine or other viscus into the scrotum. 



Heterocer'cal (Gr. heteros, different; kerkos, a tail). A term 

 applied to the tails of fishes when the lobes are unequal. 



Heteromor'phae (Gr. heteros, different; morphe, form). A divi- 

 sion of birds comprising the Hoazin. 



HeterS'phagi (Gr. heteros, other; phago, I eat). Applied to 

 birds, the young of which are born in a helpless condition, 

 and require to be fed, during early life, by the parents. 



Hetero'poda (Gr. heteros, different ; pous, pddos, a foot). A 

 group of odontophorous Mollusca. 



Heterotrlcha (Gr. heteros, different ; thrix, trichos, hair). A 

 division of the Ciliata in which the cilia vary in size. 



Hexa'merous (Gr. hex, six; nteros, a part). Consisting of six 

 portions. 



Hi'lus (L. hilutn, the mark on the concavity of a bean). The 

 concave part of a gland (as of the kidney) where the blood- 

 vessels enter. 



.Hippocam'pus ma'jor (Gr. hippokampos, from hippos, a horse, 

 and kampto, I bend, a fish with a coiled tail ; L. major, 

 greater). A large white eminence in the descending cornu 

 of each lateral ventricle of the brain. 



Hippocam'pus mi'nor (Gr. hippokampos, from hippos, a horse, 

 and kampto, I bend, a fish with a coiled tail ; L. minor, 

 less). A curved eminence on the posterior cornu of each 

 lateral ventricle of the brain. 



Hippocre'pian (Gr. hippos, a horse ; krepis, a boot). A term 

 applied to those Polyzoa having a horseshoe-shaped lopho- 

 phore. 



Hirudi'nea (L. hfrudo, Jrirudlnis, a leech). A division of the 

 Invertebrata which comprises the leeches. 



HistS'iogy (Gr. histos, a web ; logos, a discourse). The micro- 

 scopic study of the tissues. 



Holoce'phali (Gr. holds, whole; kcphale, the head). A group 



of the Elasmobranch fishes, comprising the ChfflMene, in 



which the palato-quadrate and suspensorial cartilages of 



the skull unite to form a continuous plate. 



Holometa bolic (Gr. holds, whole; metabole, change). Applied 



to those insects which undergo complete metamorphosis. 

 Holothuri'dea (Gr. holds, whole ; thuris, thuridos, a little door). 

 A division of the Echinodermata. 



