CONCHOLOGY. GLOSSARY. 



109 



NA'CREOUS. Of the nature of mother- 

 of-pearl. 



NA'SSA. Latin. A net, a snare. A 

 genus of gasteropods. 



NA'TICA. Latin. Name of a genus 

 of gasteropods (pages 34 and 51). 



NAU'TILUS. From the Greek, Nau- 

 tilos, name of the Argonaut. A 

 genus of cephalopods. 



NE'MORAL. From the Latin, nemus, 

 a wood. Belonging or relating to 

 a wood or grove. 



NERI'TA. Latin. A shell-fish. A 

 genus of gasteropods (page 51). 



NERITI'NA. Latin. Diminutive of 

 Nerita. A genus of gasteropods 

 (page 51). 



NERV'OUS. Belonging or relating to 

 the nerves. 



NILO'TICUS. Latin. Belonging to 

 the Nile. 



NI'TED. From the Latin, niteo, I 

 shine. Glossy. 



NODO'SE. Knotty. 



NU'CHA (nu-ka). The nape of the 

 neck. 



NU'CLEUS. A kernel. A centre 

 around which matter has accumu- 

 lated. 



NU'DA. Latin. Naked. 



NU'DIBRANCH. Relating to the Nu- 

 dibranchiata. 



NU'DIBRANCHIA'TA. From the Latin, 

 nudus, naked, and branchia, gills. 

 Name of an order of gasteropods. 



NUMMULI'TES. From the Latin num- 

 mus, money, and the Greek, lithos, 

 stone. An extinct genus of cepha- 

 lopods, of a thin lenticujar shape, 

 divided internally into small cham- 

 bers. These occur so abundantly 

 in some parts of the chalk forma- 

 tion, that the name of nummulite 

 limestone is given to the strata so 

 characterized. 



OB'LONG-O'VATE. Egg shaped, or oval. 



OB'SOLETE. Indistinct, not well de- 

 nned. 



O'CELLATED. From the Latin, ocu- 

 lus, an eye. Marked with eye- 

 like spots. 



O'CHRKOUS (ok 1 -re-us}. Of the colour 

 of yellow ochre. 



O'cTOPus. From the Greek, oJtto, 

 eight, and pous, foot. Name of a 

 genus of cephalopods. 



10 



OCTOPO'DIA. A tribe of cephalopods. 



OZso'pHAGEAL. Belonging to the 

 oesophagus. 



CEso'pHAGus. Latin. The gullet. 



OF'FUSCATED. Darkened, clouded, 

 dimmed. 



OFFICINA'LIS. Latin. Officinal. 

 From officina, a shop. Applied to 

 what is ready prepared. 



OLI'VA. Latin. An olive. A genus 

 of gasteropods. 



OLIVA'CEOUS. Being of a greenish 

 olive colour. 



ONCHI'DIUM. A genus of gasteropods 

 (page 41). 



OPA'QUE. From the Latin, opacus, 

 dark. Incapable of transmitting 

 light. 



OPE'RCULUM. From the Latin, 

 operio, I cover. The lid or door 

 which covers anything. 



O'PTIC. From the Greek, optomai, I 

 see. The principal nerve of vision, 

 is so called. 



ORBI'CULA. From the Latin orbis, a 

 circle. A genus of brachiopod 

 mollusks (page 90). 



ORBI'CULAR. Spherical, circular, 

 round. 



O'RGAN. From the Greek, organon, 

 an instrument. Part of an organ- 

 ized being, destined to exercise 

 some particular function. 



ORGANIZA'TION. A mode of structure. 



OSTRA'CEA. Name of a family of 

 bivalves. 



OS'TREA. Latin. An oyster. Name 

 of a genus of the family of Os- 

 tracea. 



O'VARIES. Female organs which 

 contain the ova or eggs. 



O'VATE. Shaped like the longitudi- 

 nal section of an egg. 



O'VIDUCT. From the Latin ovum, an 

 egg, and duco, I conduct. The 

 tube which conveys the ovum from 

 the ovary. 



OVI'PAROUS. From the Latin, ovum, 

 an egg, and pario, I produce. Ap- 

 plied to animals whose young are 

 produced by means of eggs. 



O'vom. Oval. 



O'VULA. From the Latin, ovum, an 

 egg. A genus of gasteropods. 



O'VULJE. Plural of ovula. 



PA'LATINE. Relating to the palate. 



