GLOSSARY. 3 



A'crogen (Gr. akron, the summit ; gennao, I produce). A 

 plant, the growth of which takes place at its summit. 



Acro'mion (Gr. akron, the summit ; omos, a shoulder). The 

 process of the scapula which forms the summit of the 

 shoulder. 



Actinozo'a (Gr. aktis, a ray ; zoon, an animal). A division of 

 the Coelenterata. 



Adambula'cral ossicles (L. ad, to ; ambulacrum, a walk shaded 

 with trees ; ossicle, a little bone). In the star-fishes, the 

 small ossicles against which the ambulacral ossicles abut, 

 and which lie at the sides of the groove which the ambula- 

 cral ossicles bound superiorly. 



Adduc'tion (L. ad, to; duco, I lead). The bringing of a limb 

 to the middle line ; the reverse process to abduction. 



Adduc'tor. A muscle, the contraction of which brings a limb 

 to another or towards the middle line. In the Lamelli- 

 branchiata, the muscles which close the valves of the shell 



_ are termed adductors. 



A'denoid ( Gr. aden, a gland ; eidos, form) . Glandular ; 

 applied to a special variety of connective tissue found in 

 glands. 



A'dipose (L. ddeps, fat). Fatty. 



Ad'nate (L. ad, to; natus, born). A term applied to the 

 stipules of plants which adhere to the petiole. 



Adre'nal (L. ad, to ; renes, the kidneys). A name given to two 

 glandular bodies connected with the kidneys. 



Adventi'tia capilla'ris (L. adventicius, foreign, strange; capillus, 

 a hair). A continuous covering which some capillaries 

 possess, and which is derived from the surrounding con- 

 nective tissue. 



JEsthe'sodic (Gr. aisthesis, sense, perception). Conveying 

 sensor)' impulses ; sensitive. 



JEtio'logy (Gr. aitiologia, the giving an account). The branch 

 of Biology which treats of the origin and development of 

 organic beings. 



Aetomor'phae (Gr. aetos, an eagle ; morphe, form). The birds of 

 prey. 



Afferent (L. ad, to ; fero, I carry). Carrying to, as an afferent 

 nerve which conveys impulses to a nerve centre. 



Aga'mic (Gr. a, not ; games, marriage). Applied to ova which 

 germinate without being impregnated. 



Agamoge'nesis (Gr. a, not ; gamos, marriage ; gennesis, a 

 beginning) . Non-sexual reproduction. 



