90 GLOSSARY. 



Ni'damental glands (L. ntdamentum, the materials of a nest). 

 Glands which in the female Cephalopoda secrete a viscid 

 fluid, which coats the ova, and connects them together. 



Node (L. nodus, a knot). The parts of the stem of plants 

 from which leaves or leaf-buds spring. 



No'dule of cerebellum (L. nodulus, a little knot). The an- 

 terior termination of the inferior vermiform process. 



No'dulus Aran'tii(L. nodulus, a littleknot). See Corpus Arantii. 



Non-decidua'ta (L. non, not ; detiduus, falling). A division of 

 the Mammalia in which no decidua is formed. 



Non ruminan'tia (L. non, not; rumino, I chew the cud). A 

 division of the Artiodactyla, the members of which do not 

 chew the cud (ruminate). 



Nor'ma verticalis (L. vertical rule). A method of measuring 

 the capacity of the skull by a perpendicular view from 

 above. 



No'tochord (Gr. notas, the back ; chorde, a string). The 

 flattened cellular rod which is developed beneath the me- 

 dullary groove in the embryo, called also chorda dorsalis. 



Notopo'dium (Gr. notos, the back ; pons, podos, a foot). The 

 superior portion of the parapodium in the Annelida, so 

 called because it occupies its dorsal aspect. 



No'tum (Gr. notes, the back). The tergal piece of each somite 

 of the thorax in the Insecta. 



Nu'cha (an unclassicaf word for neck). Used to indicate the 

 region of the neck, as the ligamentum nucJiff, which in 

 some Vertebrata attaches the head to the spines of the 

 vertebras. 



Nu'chal (iiucha, neck). Applied to that plate of the dorsal 

 shield in the Chelonia, which occupies the front part of the 

 middle line. 



Nucleated (1* nucleus, a kernel). Possessing a nucleus. 



Nucle'olus (L. a little kernel). A dense body within the 

 substance of a nucleus. 



Nu'cleus (L. a kernel). A body found in cells, and forming 

 the central portion round which the rest of the cell con- 

 tents are gathered. 



Nu'cule (L. nucula, a little nut). A term applied to the spore- 

 fruit or female element in the fructification of Chara. 



Nudibranchia'ta (L. nudus, naked; Gr. bronchia, a gill). A 

 group of the Branchiogasteropoda, destitute of a mantle. . 



Nym'phae (Gr. nutnphc, a maiden). Another name for the 

 labia intcrna of the female generative organs. 



