232 



GLOSSARY 



Rachiglos'sate. Having three 

 longitudinal rows of teeth on 

 the radula. 



Ra'dius, 41. 



Radula. Tongue of a gastero- 

 pod moUusk. 



Re nal, 167. 



Retic'ulate. Having veins or 

 fibers crossing like network. 



Ret'ina, 158. 



Retract'or, 142. 



Rhopaloc'era. The group of 

 Lepidoptera having clubbed 

 antennae — butterflies. 



Ric'tal. Pertaining to the cor- 

 ners of the mouth. 



Ros'trate. Beaklike. 



Sclerot'ic, 158. 



Scutel'lum, pi. scutella. Trans- 

 verse scales on the tarsi and 

 toes of the bird. 



Sec'ondaries. The feathers on 

 the second section of the wing 

 of a bird. 



Sep'tum, pi. septa. Radial par- 

 tition of a coral cup. A trans- 

 verse partition in worms. 



Si'nus. A detached vessel or 

 canal. A cavity. 



So'mite, 26. 



Sper'maries. The reproductive 

 glands of the male animal. 



Spir'acle, 24. 



Spu'rious quill. Outer primary 

 quill when much reduced. 



Stridula'tion, The making of 



sound by rubbing hard parts 

 together as in insects. 

 Su'bulate. Awl-shaped. 



Taenioglos'sate. Relating to a 

 long narrow tongue of mol- 

 lusks bearing seven rows of 

 teeth. 



Teg'ula, pi. tegulae, 66. 



Teg'men, pi. tegmina. The outer 

 wmg of certain insects. 



Ter'gum, 23. 



Tertial feathers. Growing on 

 the innermost division of a 

 bird's wing. 



Thy'mus. A ductless gland in 

 the region of the throat of 

 many vertebrates. 



Toxoglos'sate. Pertaining to 

 the tongue of gasteropods con- 

 taining poison fangs. 



Tra'cheae. Tubes of the respi- 

 ratory systems of Arthropods. 



Tym'panum. The eardrum or 

 membrane through which 

 sound is conveyed. 



Um'bo, pi. umbo'nes. The hump 

 above the hinge on a bivalve 

 shell. 



Unira'mous. Consisting of one 

 branch. 



Urinif'erous Tubules, 44. 



U'rostyle, 174. 



Vas deferens, 33. 

 Ver'miform, 201. 



