GLOSSARY. 351 



Teo'ohai, (Gr. troches, a wheel). "Wheel-staped ; applied to the ciliated diso 

 of the JSotifera. 



Tko-chan'tee f Gr. trecTiO, I run). A process of the upper part of the thigh- 

 hone (femur) to which are attached the muscles which rotate the limb. 

 There may be two, or even three, trochanters present. 



Teo'ohoid (Gr. trochos, a wheel ; and eidos, form). Conical, with a flat base ; 

 applied to the shells of Forwrninifera and Vnwalme Molluscs. 



Tro'phi (6r. trophos, a nourisher). The parts of the mouth in insects which 

 are concerned in the acquisition and preparation of food. Often called 

 " instrumenta oibaria." 



Teoph'o-some (Gr. trepho, I nourish ; and soma., body). Applied ooUeotiyely 

 to the assemblage of the nutritive zooids of any Mydrozobn. 



TKror'oA.<rED (Lat. trunco, I shorten). Abruptly out off ; applied to univalve 

 shells, the apex of which breaks off, so that the shell becomes " decol- 

 lated." 



Tu-Eio'o-iA (Lat. tuia, a tuhe ; and cola, I inhabit). The order of Armelida 

 which construct a tubular case in which they protect themselves. 



Tn-Bio'o-LOns. Inhabiting a tube. 



Tu-bu-lae'i-da. 



Tu-iti-ca'ta. (Lat. tunica, a cloak). A class of Molluseoida which are envel- 

 oped in a tough, leathery ease or " test." 



Tue-bbl-la'ei-a (Lat. turbo, I disturb). An order ot Scoledda. 



Tue'ei-na-^jed (Lat. twio, a top). Top-shaped ; conical, with a round base. 



Ul'na (Gr. oUne, the elbow). The outermost of the two bones of the fore- 

 arm, correspondiag with the^M^a of the hind-limb. 



tjM'BEi>LATE (Lat. umiella, a parasol). Forming an umbel — i. «., a number 

 of nearly equal radii, all proceeding from one point. 



0m-bil'i-ods (Lat. for navel). The aperture seen at the base of the axis of 

 certain univalve shells, which are taen said to be " perforated" or " um- 

 bilicated." 



Um'bo (Lat. for the boss of a shield). The beak of a bivalve shell. 



Um-beel'la. The contractile disc of one of the Zucernarida. 



Uir'oi-ifATE (Lat. uncus, a hook). Provided with hooks or bent spines. 



Dfr-ama'Tj-LATB (Lat. uru/uis, nail). Furnished with claws. 



Dn-gu-la'ta (Lat. ungula, hoof). The order of Mammals comprising tho 

 Hoofed Quadrupeds. 



Un'ou-late. Furnished with expanded nails constituting hoofs. 



U-Ni-Loo'u-LAE (Lat. unus, one ; and looulus, a little purse). Possessing a 

 single cavity or chamber. Applied to the shells of Foramimfera and Jilol- 

 lusca. 



U'ni-valvb (Lat. unus, one ; valval, folding-doors). A shell composed of a 

 single piece or valve. 



U-eo-de'la (Gr. oura, tail ; delos, visible). The order of the tailed Amphi- 

 bians (Newts, etc.). 



UE'Ti-OA-Tisa Cells (Lat. urtica, a nettle). {See Cnidse.) 



Vao'c-oles (Lat. vacuus, empty). The little cavities formed in the interior 

 of many of the Protozoa by'thepresenoe of little particles of food, usually 

 surrounded by a little water. These are properly called " food-vaouoles,'' 

 and were supposed to be stomachs by Ehrenberg. Also the clear spaces 

 which are often seen in the tissues of many Galenterata. 



Vae'i-oes (Lat. vaHx, a dilated vein). The ridges or spinose lines which 

 mark the former position of the mouth in certain univalve shells. 



Vas'ou-lab (Lat. vas, a vessel). Connected with the circulatory system. 



Ve'lum (Lat. for a sail). The membrane which surrounds and partially closes 

 the mouth of the " disc " of MeduscB, or medusiform gonophores. 



Ven'teal (Lat. venter, the stomach). Kelating to the infenor surface of the 

 body. 



Vbi/tei-ole (Lat. dim. of venter, stomach). Apnliod to one of tho cavities of 

 the heart, which receives blood from the auricle. 



