62 GLOSSARY. 



Hepa'tic (Gr. hepar, 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. 



Keterocer'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. 



Hetero'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. 



Heterotri'cha (Gr. heteros, different ; thrix, trichos, hair). A 

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



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

 portions. 



Hi'lus (L. hilum, 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. htrudo, hirudmis, a leech). A division of the 

 Invertebrata which comprises the leeches. 



Histology (Gr. histos, a web ; logos, a discourse). The micro- 

 scopic study of the tissues. 



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

 of the Elasmobranch fishes, comprising the Chimaerae, 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, 



