SHRIMP 



303 



SILICATES 



Shrimp. 



Shrimp, (shrimp). [A.-S. terymman, to dry 

 up.] l.=Crangon: a 

 small crustacean ani- 

 mal, the type of 

 Crangonidse, belong- 

 ing to Podophthal- 

 mia, q.v. 2. Fairy S. 

 =Chirocephalus dia- 

 1 thai i us. Fresh-water 

 .=Gammarus pulex. 

 Glass S.= Erich thus. 

 Opossum S.=Mysis. 



Shrouds, (shroudz). Long ropes, extending 

 from the mast-head 

 to the sides of a ship. 

 Shrub, (shrub). [Scrob, %$> 



the A.-S. name.] A 

 plant of smaller size 

 than a tree, but 

 larger than an herb. 

 Sea - shrubs = Gor- 

 oaite. 



Shunt, (shunt). [Shun.] 

 In electricity, a wire 

 diverting a part of 

 the current. 

 Shushwaps. An Ame- 

 rican people. Shrouds. 

 Siamang. A variety of the gibbon, q. v. 

 Sibbaldia, (sib-baldi-a). [Mr. Sibbald.] A 

 plant belonging to Rosaceae. 

 Sickle. A group of stars, of which Regulus 

 is the chief, in the constellation Leo, having 

 the form of a sickle. 



Sidereal, (si-de're-al). [L. sidus, stars.] Re- 

 lating to the stars. S.-day: the time occu- 

 pied by the rotation of the Earth, as mea- 

 sured by the recurrence of the first point of 

 Aries. S.-time: the angular distance of the 

 first point of Aries and the meridian of 

 Greenwich. S.-year=iho time occupied by 

 a complete revolution of the earth, as mea- 

 sured by the recurrence of some fixed star= 

 3(i5 days 6 h. 10 m. nearly. 

 Siderite, (sid'er-it). [Gk. sideros, iron.] A 

 variety of chalybite, q.v. 

 Siderolites, (sid'er-6-lits). [Gk. sideros, iron; 

 lithos, stone. ]== Meteorites, when chiefly of 

 iron. 



Sideroxylon, (sid-er-oks'i-lon). [Gk. sideros, 

 iron; xylon, wood.] An evergreen tree, be- 

 longing to Sapotacete; also called Iron-wood. 

 Sidus, (si'dus). [The Latin word.] A star, or 

 a group of stars. 



Siebold's classification of animals 

 Vertebra ta. 

 Mammalia. 

 Aves. 

 Reptilia. 



JVIonopnoa. 



Monimostylica. 

 Streptostylica. 

 Dipnoa. 

 Pisces. 



Teleostei. 



Ganoidei. 



Elasmobranchii. 



Marsipobranchii, 



Leptocardii. 



Arthropoda. 

 Insecta. 

 Arachnida. 

 Crustacea. 

 Mollusks, 



Cephalopoda. 

 Cephalophoru. 

 Acephala. 

 Veruies. 



Annulati. 

 Rotatorii. 

 Tui-bellarii. 

 Helmiuthes. 

 Zoophyte. 



Echinodermata. 

 Acalephse. 

 Polypi. 

 Protozoa. 



Rhizopoda. 

 Infusoria. 



Gicmen's unit of resistance=l metre of pnro 

 mercury, 1 sq. millimetre in section, at 32 J 

 I\='95(5 Ohm. 

 Sienite= Syenite, q.v. 

 Sighing. A prolonged inspiration. 

 Sight, (sit). [Sikt, the A.-S. word.] Percep- 

 tion by means of the eye. Long &=Pres- 

 bytism. Short S.=Myopy. 

 Sigillaria, (sij-il-la'ri-a). [L. sigilla, small 

 image.] Coal-plants: the bark and sfoma of 

 which are found in carboniferous strata, 

 with roots passing down into fire-clay be- 

 neath. Named from the shape of the leaf- 

 scars. 

 Sigmoid, (sig'moid). [Gk. sifjma, the Greek 



S ; eidos, form.] Curved like the letter S. 

 Signature, (sig^na-tur). In music, the marks 

 at the beginning of each stave, showing how 

 many of the notes are to be raised or lowered 

 a semitone. 



Signs of zodiac. The twelve divisions of tho 

 Ecliptic, each occupying 30. Northern: 

 Aries, Taurus, Gemini, Cancer, Leo, Virgo. 

 Southern: Libra, Scorpio, Sagittarius, Capri- 

 cornus, Aquarius, Pisces, v. Zodiac. 

 Silaus, (si-la'us).= Pepper-saxifrage: an herb 

 belonging to Apiaceae. . 



Silenaceae, (si-len-a'se-e). [Silene, q.v.'] A 

 sub-division of Caryophyllacese. 

 Silenales, (sl-le-na'lez). [Silene, q.v.] Plants, 

 with monodichlamydeous flowers and com- 

 pound fruits, forming a division of Hypo- 

 gynous Exogens. 



Silene, (si-le'ne). [Classical.] Catchfly, q.v. 

 S. ocaM;is=Moss campion. 

 Silex, (si'leks). [L. silex, flint ] Impure 

 silicic acid: flint. 



Silhouette, (sil'oo-et). [M. Silhouette.] A 

 profile likeness, usually black. 

 Silica, (sil'i-ka). [L. silex, flint.] =SiC>2: silicic 

 anhydride=Silicic dioxide=Silicic acid : a 

 crystalline substance, of which quartz, agate, 

 amethyst, and chalcedony, are nearly pure 

 specimens. S. group of minerals: includes 

 quartz, chalcedony, and opal. 

 Silicates, (sil'i-kats). [Silica, g..]=Felapar, 

 mica, hornblende, clays, &c.: natural mineral 

 compounds of silicic acid with one or more 

 metallic bases. 0r/to-,=Normal S. 



