GLOSSARY OF TECHNICAL TERMS. 871 



MONOECIOUS. Gr. monos, single; oikos, house. Having the male and female sexes 



represented in a single individual. 

 MONOFLAGELLATE. Gr. monos, alone ; flagellum. Bearing a single flagellum only. 



MORULA. Lat. dim of morum, a mulberry. That stage of the ovum when, after segmen- 

 tation, it is represented by a berry-like spheroidal mass of nucleated cells. 



MORULOID. Having the character of a Morrtla. 



MORPHOLOGICAL. Gr. morphe, shape ; logos, description. Having relation to the 



general structure of organic forms whether animals or plants. 

 MULTICAPITATE. Lat. multus, many ; capitatus, having a head. Having many heads. 



MULTIFLAGELLATE. Lat. multus, many ; flagellum, whip. Possessing many flagella or 

 whip-like appendages. 



MULTINUCLEATE. Lat. multus, many ; nucleus, a kernel. Possessing a plurality of 

 nuclei, e. g. Opalina. 



MYCELIUM. Gr. mukes, a fungus. The aggregation of cellular filaments or hyphae of a 

 fungus, and from out of which the reproductive structures are developed. 



MYOPHAN. Gr. muon, a muscle ; phaino, I show. Term applied by Haeckel to that layer, 

 developed in many Infusoria, that contains muscle-like fibrillas. 



MYXOPODA. Gr. muxa, mucus ; POUS, a foot. Term applied by Huxley to those 

 Protozoa whose locomotive appendages take the form of pseudopodia, synonymous 

 with Rhizopoda. 



NAPIFORM. Lat. napus, a turnip ; forma, shape. Turnip-shaped. 

 NUCLEOLAR. Lat. nucleus, a kernel. Having the character of a nucleus. 



NUCLEOLUS. Lat. nudeolus, a little kernel. An exceedingly minute more solid particle 

 developed singly or in varying number within the substance of the nucleus of an 

 animal or vegetable cell. Its homologue among the unicellular protozoic organisms 

 is distinguished in this volume by the title of the Endoplastule. 



NUCLEUS. Lat. nucleiis, a small nut or kernel. A minute refringent or more densely 

 granular corpuscle developed within the substance of most animal and vegetable cells, 

 its homologue in unicellular protozoic organisms being distinguished by the title of 

 the Endoplast. 



(EsOPHAGEAL. Gr. oisophagus, the gullet. Relating to or connected with the oesophagus. 



OESOPHAGUS. Gr. oisophagus, the gullet. A distinct gullet or cesophageal tube has been 

 recognized as existing in certain Vorticellidae. 



ONTOGENY. Gr. on, ontos, being ; genos, lineage. The circumstances relating to the 

 entire developmental metamorphoses or life-history of any individual animal or plant. 



OPERCULUM. Lat. operculum, a lid or cover. The lid-like structure developed within 

 the sheath or lorica, or attached to the body of certain Vorticellidas. 



PANICULATE. Lat. panicula, a tuft on plants. That form of inflorescence consisting of 

 spikelets on long peduncles which are developed in the manner of a raceme. 



PANSPERMISTS. Gr. pan, all, everywhere ; sperma, seed. A name conferred upon those 

 who, in the controversy upon the subject of Spontaneous Generation, advocated the 

 opinion that invisible germs of Infusoria and other microscopic organisms were dis- 

 tributed throughout the atmosphere. 



PARENCHYMA. Gr. para, together ; encheo, to pour in. The secreting tissue of glands, 

 also applied to cellular tissue of plants, and (by Stein) to the more fluid internal sub- 

 stance of Infusoria, synonymous in the last-named case with Endoplasm. 



PARORAL. Gr. para, beside ; Lat. os, oris, mouth. The fringe of cilia developed at the 

 side of the adoral series on certain Oxytrichidac. (See woodcut, vol. ii. p. 760.) 



