GLOSSARY. 6 1 



Hae'matin (Gr. haima, blood). A substance obtained by the 



decomposition of the colouring matter of the blood. 

 Hsemoglo'bin (Gr. haima, blood ; L. globulus, a globule). The 



colouring matter of the red corpuscles of the blood. 

 Hse'morrhage (Gr. haima, blood; rheo, I flow). Bleeding 



from a wound. 

 Hsemorrhoi'dal (Gr. haima, blood; rheo, I flow). A name given 



to certain small arteries and nerves of the pelvis, and to a 



plexus of veins in the pelvis. 

 Ha'litus (L. breath, vapour). The vapour discharged by 



blood newly drawn from a living body. 

 Hal'lux. The big toe. The first digit of the pes. 

 Ha'mulus (L. a little hook). The hook-like process in 



which the osseous lamina spiralis of the cochlea termi- 

 nates. 

 Ha'mulus lachrymalis (L. little lachrymal hook). The pointed 



extremity of the lachrymal bone. 

 Harmo'nia (Gr. harmozo, I fit together). A term applied to 



denote an articulation, such as that of the two superior 



maxillary bones, in which two comparatively smooth sur- 

 faces meet. 

 Haver'sian canals. The canals in bone which contain the 



blood-vessels ; so named from their discoverer Havers. 

 Hectoco'tylus (Gr. ektos, without ; 'kotulos, a cavity). The 



modified arm in the male Cephalopoda which is used as a 



reproductive organ. 

 Helicine arteries (Gr. helix, a spiral). A name given to the 



small curling extremities of the arteries which supply the 



penis. 

 Helicotre'ma (Gr. helix, a spiral ; trema, a hole). The opening 



by which the two scalae communicate at the summit of the 



cochlea of the ear. 

 Heliozo'a (Gr. helios, the sun ; zoon, an animal). A group of 



Rhizopods usually classed with the Radiolaria. 

 Helix (Gr. helix, a spiral). The elevation forming the greater 



part of the margin of the external ear. 

 Hemiopsia (Gr. hemi, half; dps, an eye). A defect of vision 



in which only half an object is seen. 

 Hemiple'gia (Gr. hemi, half; plesso, I strike). A form of 



paralysis; so named because only one side of the body is 



affected. 

 Hemip'tera (Gr. hemi, half; pteron, a wing). A group of 



insects. 



