GLOSSARY. 599 



structures occasionally developed in connection with the internal organs 

 or viscera. 



SPONGE-PARTICLES. (See Sarcoids. ) 



SPONGIDA (Gr. spoygos, a sponge). The division of Protozoa commonly known 

 as sponges. 



SPORES (Gr. spora, seed). Germs, usually of plants; in a restricted sense, 

 the reproductive "gemmules" of certain Sponges. 



SPOROSACS (Gr. spora, seed; and sakkos, a bag). The simple generative 

 buds of certain Hijdrozoa, in which the medusoid structure is not deve- 

 loped. 



SQUAMATA (Lat. squama, a scale). The division of Reptiles comprising the 

 Ophidia and Lacertilia in which the integument develops horny scales, but 

 there are no dermal ossifications. 



STATOBLASTS (Gr. statos, stationary ; blastos, bud). Certain reproductive buds 

 developed in the interior of Polyzoa, but not liberated until the death of 

 the parent organism. 



STEGANOPHTHALMATA (Gr. steyanos, covered ; and orhthalmos, the eye). 

 Applied by Edward Forbes to certain Medusae, in which the sense-organs 

 ("marginal bodies") are protected by a sort of hood. The Steyanojth- 

 thalmata are now separated from the true Medusidce, and placed in a sepa- 

 rate division under the name Lucei'narida. 



STELLERIDA (Lat. stella, star). Sometimes employed to designate the order 

 of the Star-fishes. 



STELLIFORM. Star-shaped. 



STEMMATA (Gr. stemma, garland). The simple eyes, or "ocelli," of certain 

 animals, such as Insects, Spiders, and Crustacea. 



STERNUM (Gr. sternon). The breast-bone. 



STIGMATA. The breathing-pores in Insects and Arachnida. 



STOLON (Gr. stolos, a sending forth). Offshoots. The connecting processes 

 of sarcode, in Foraminifera ; the connecting tube in the social Ascidians; 

 the processes sent out by the coenosarc of certain Actinozoa. 



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



STOMATODE (Gr. stoma). Possessing a mouth. The Infusoria are thus often 

 called the Stomatode Protozoa. 



STREPSTPTERA (Gr strepho, I twist ; and pteron, wing). An order of Insects 

 in which the anterior wings are represented by twisted rudiments. 



STREPSIRHINA (Gr. strepho, I twist ; rhiues, nostrils). A group of the 

 Quadrumana, often spoken of as Prosimice. 



STROBILA (Gr. strobilos, a top, or fir-cone). The adult tapeworm 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 without a stalk. 



SUPINATION (Lat. supinm, 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. 



SYNAPTICUL^: (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 con- 

 tractile cavity, especially the heart. 



