Stomapoda

(Gr. stoma, mouth; pous, foot). An order of Crustacea.

Stomatode

(Gr. stoma). Possessing a mouth. The Infusoria are thus often called the Stomatode Protozoa.

Strepsiptera

(Gr. strepho, I twist; pteron, wing). An order of Insect3 in which the anterior wings are represented by twisted rudiments.

Strepsirhina

(Gr. strepho, I twist; rhines, nostrils). A group of the Quad-rumana, often spoken of as Prosimiae.

Strobila

(Gr. strobilos, a top, or fir-cone). The adult Tape-worm, with its generative segments or proglottides ; also applied to one of the stages in the life-history of the Lucernarida.

Styliform

(Lat. stylus, a pointed instrument; forma, form). Pointed in shape.

Sub-calcareous

Somewhat calcareous.

Sub-central

Nearly central, but not quite.

Sub-pedunculate

Supported upon a very short stem.

Sub-sessile

Nearly sessile, or almost without a stalk.

Supination

(Lat. supinus, lying with the face upwards). The act of turning the. hand with the palm upwards.

Suture

(Lat. suo, I sew). The line of junction of two parts which are immovably connected together. Applied to the line where the whorls of a univalve shell join one another; also to the lines made upon the exterior of the shell of a chambered Cephalopod by the margins of the septa.

Swimmerets

The limbs of Crustacea, which are adapted for swimming.

Symphysis

(Gr. sumphusis, a growing together). Union of two bones in which there is no motion, or but a very limited amount.

Synapticulae

(Gr. sunapto, I fasten together). Transverse props sometimes found in Corals, extending across the loculi like the bars of a grate.

Systole

(Gr. sustello, I contract). Applied to the contraction of any contractile cavity, especially the heart.

Tabulae

(Lat. tabula, a tablet). Horizontal plates or floors found in some Corals, extending across the cavity of the "theca," from side to side.

Tactile

(Lat. tango, I touch). Connected with the sense of touch.

Taeniada

(Gr. tainia, a ribbon). The division of Scolecida comprising the Tape-worms.

Taenioid

(Gr. tainia; and eidos, form). Ribbon-shaped, like a Tape-worm.

Tarso-metatarsus

The single bone in the leg of Birds produced by the union and anchylosis of the lower and distal portion of the tarsus with the whole of the metatarsus.

Tarsus

(Gr. tarsos, the flat of the foot). The small bones which form the ankle (or "instep" of man), and which correspond with the wrist (carpus) of the anterior limb.

Tectibranchiata

(Lat. tectus, covered; and Gr. bragchia, gills). A division of Opisthobranchiate Gasteropoda in which the gills are protected by the mantle.

Tegumentary

(Lat. tegumentum, a covering). Connected with the integument or skin.