GLOSSARY. 89 



Nematorhyn'cha (Gr. nema, nematos, thread ; rhunchos, snout). 

 A proposed group of the Invertebrata, which will include 

 the genera Chaetonotus, Echinoderes, and their allies, 

 hitherto classed with the Rotifera. 



Nematosco'lices (Gr. nema, nematos ; thread ; skolex, a worm). 

 A division of Invertebrata proposed by Huxley, con- 

 taining the Nematoidea and Nematorhyncha. 



Neopla'sia (Gr. neos, new ; plasis, formation). Growth or 

 development of fresh material. 



Ner'vures (L. nervus, a nerve, sinew). Thickenings of the 

 wings in some Insecta. 



Neu'ral (Gr. neuron, a nerve). Relating to the nervous system. 

 The intestine in the Invertebrata is said to have a neural 

 flexure when it bends towards that part of the body which 

 contains the nerve-centres. 



Neurapo'physis (Gr. neuron, a nerve ; apophuo, I sprout). An- 

 other term for the lamina of the neural arch of a vertebra. 



Neurilem'ma (Gr. neuron, a nerve; lemma, a sheath). The 

 sheath of connective tissue which envelopes a nerve. 



Neu'rin (Gr. neuron, a nerve). A nitrogenous fluid obtained 

 from the bile of some animals. 



Neu'ro-cen'tral su'ture (Gr. neuron, a nerve; L. sutura, a 

 seam). The junction between the ossification of the 

 centrum of a vertebra 'and the ossifications forming the 

 neural arches. 



Neuro'glia (Gr. neuron, a nerve; glia, glue). The delicate 

 connective tissue which forms a framework for the nervous 

 tissue of the brain and spinal cord. 



Neurology (Gr. neuron, a nerve ; logos, a discourse). The 

 branch of Anatomy which treats of the structure and 

 distribution of nerves and nerve-tissue. 



Neuropo'dial cir'rus (Gr. neuron, a nerve, tendon ; pous, podos, 

 a- foot; L. cirrus, a curl of hair). A small flexible filament 

 attached to the parapodium of some Annelids. 



Neuropo'dium (Gr. neuron, a nerve; pous, podos, a foot). The 

 inferior portion of the parapodium in the Annelida, so 

 called because occupying its neural aspect. 



Neurop'tera (Gr. neuron, a nerve, sinew ; pteron, a wing). A 

 group of the Insecta which comprises the ant-lions, caddis- 

 flies, and scorpion-flies. 



Nic'titating mem'brane (L. nictatio, winking). A fold of the 

 conjunctiva forming the third eyelid in birds, amphibia, 

 and some mammals. 



