GLOSSARY. 679 



Pupa. (From the Latin for a doll or little image.) The passive state of an insect 

 immediately preceding the lust. 



PunrAuous. (Lat. pupa ; pario, I prodnce.) The insects that bring forth their 

 young in the pupa state. 



Pylorus. From the Greek. The aperture which leads from the stomach to tho in- 

 testines. 



PvRiFOKM. (Lat. pyrum, a pear.) Pear-shaped, 



QuADUiFiD. Cleft in four parts. 



QuATEUNARY. In clicmistry, bodies composed of four elementary substances. 



Radiata. (Lat. radius, a ray.) The name of the lowest primary division of the 



animul kingdom. 

 Ramose. (Lat. ramus, a branih.) branched. 

 Reniform. (Lat. rcn, a kidney.) Kidney-shaped. 

 Rettilia. (Lat. rcpto, I creep.) The class of Vertebrate animals with imperfect 



respiration and cold blood. 

 Rete Mdcosdm. The cellular layer between the scarf-skin and true skin, which is 



the seat of tlic peculiar colour of the skin. 

 RiiYNCiionTiiEs. (Gr. r/iutichos, a beak ; lithos, a stone.) Beak-shaped fossils; the 



extremities of tlio mandibles of Cephalopods, allied to the Nautilus. 

 RoTiFERA. (Lat. roki, a wheel ; J'cro, I bear.) The name of the class of infusorial 



animakules, characterised by the vibratile and apparently rotating ciliary organs 



upon the heads. 



Salpians. (Gr. Salpe, a kind of fish.) The order of tunicated MoUusca which 

 float in the open sea. 



Sarcophaga. (Gr. sarx, flesh ; pJiago, I eat.) Flesh-eating animals. 



Sacciform. Shaped like a sac or bag. 



ScuTiBRANCiiiATA. (Lat. scutuiii, a shield ; hragchia, gills.) The order of gas- 

 tropodous ^lollusca, in which the gills arc protected by a shield-shaped shell. . 



Sebaceous. (Lat. sebum, tallow.) Like lard or tallow. 



Segjientation. The act of dividing into segments. 



Semilunar. Crescent-shaped, like a half-moon. 



Semipinnate. Fringed on one side. 



Sepal. The divisions of the calyx of a flower. 



Septa. Partitions. 



Sericterlv. (Gr. serikos, silky.) The glands which secrete the silk in the silk- 

 worm. 



Serrated. (Lat. serra, a saw.) Toothed like a saw. 



Sessile. Attached by a base. 



Set.e. (From tlic Latin for a bristle.) Bristles, or similar parts. 



SETiGEKors. Bristly. 



Siliceous. (Lat. sUcx, flint.) Flinty. 



Sinus. A dilated vein or receptacle of blood. 



SiPHONOSTOMOUS. (Gr. siphon, a tube ; stoma, a mouth.) Animals furnished with 

 a suctorious moutli like a tube. The term is usually api)licd to Crustacea so 

 characterised . 



Spatulate. {Lat. spatula.) Shaped like a spatula. 



Sperm.vtiieca. (Gr. sperma, seed ; the/ie, sheath.) A receptacle attached to the 

 oviducts of insects. 



Spermatoa, (Gr. sperma, and ooti, an egg.) The nucleated cell in which the sper- 

 matozoon is developed. 



Spermatopiiora. (Gr. sperma ; phero, I bear.) The cylindrical capsules or sheaths 

 which convey the sperm. In the Cephalopods arc called the moving filaments 

 of Needham, after their discoverer. 



Spermatozoa. (Gr. sperma ; zoon, an animal.) The peculiar microscopic moving 

 filaments and essential parts of the fertilizing fluid. 



Sphincter. (Gr. sphiijkter.) The circular muscles which contract or close natural 

 apertures. 



Spicula. (Lat. spiculum, a point or dart.) Fine pointed bodies like needles. 



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