STRIGULA, 



[ 744 ] 



STYLONICHIA. 



BiBL. Kiitz. 7?««//. 125 : Sp. Ak/. 114; 

 Rabenbt. A/(/. i. 307 ; Grimow, M. M. J. 

 xviii. 171. 



STKIG'ULA, Fries.— A genus of P^Te- 

 nodei (Licbenaceous Liebens), containing 

 one Britisb species, S. Bahinc/tonii, growing 

 ou tbe leaves of box and otber evergreens. 

 Tballus subepidermal ; asci containing eigbt 

 cymbiform triseptate spores. 



BiBL. Leigbton, Lkh. Fl. 498; Berk. 

 Enf/. Bot. Supp. pi. 2957. 



STROMBID'IUiM, CI. & Lacb.— A ge- 

 nus of Peritricbous Iufasoria,fam. Halterina. 



Char. No setse for leaping, essentially 

 swimmers. 8 species ; marine and fresb- 

 Avater. (CI. & Lacbm. Inf. 371 ; Kent, 

 Inf. O.-U.) 



STKOMBIDINOP'SIS, Kt.— A genus of 

 Heterotricbous Infusoria. Free, ovate, 

 ciliated ; anterior cilia longer, forming a 

 wreatb of one or more turns. S. (/yrans ; 

 fresbwater; lengtbl-350". (Kent, //(/.614.) 



STRONG YLID'IUM, Sterki.— A genus 

 of Hypotricbous Infusoria. Like Urolepttis 

 piscis, but witli a tbicker twisted bodv, and 

 frontal and anal styles. (Kent, Inf. 779.) 



STRON'GYLUS, Miill— A genus of 

 Nematoid Entozoa. Tbe species are very 

 numerous. S. jiergraciUs is tbe cause of tbe 

 grouse-disease. S. saju/visiu/n is allied to 

 Anchylosto7na, inbabits tbe buman small 

 intestine, sucking tbe blood and producing 

 ansemia. (See tbe Bibl. of Entozoa, and 

 Dounon, Parasites.) 



STRONTIA OR STRONTIAN. — Tbe 

 crystals of tbe sulpbate of tbis eai'tby base 

 are figured in I'l. 10. fig. 18, to contrast witb 

 those of tbe sulpbates of barvta and lime. 



STRUTHIOP'TE- 

 RIS, Willden. = 0??(7- 

 clea, pt. — -S'. (Onoclea) 

 f/erma?iica, fig. 710. 

  STRYCHNlNE,or 

 Strychnia. See Al- 

 kaloids, p. 31. 



STYLOBIB'LI- 

 UM, Ebr. — A genus 

 of fossil Diatomacefe. 

 C/iar. Frustules 

 circular, single, com- 

 pound ; valves con- 



tiguous, 



in a single 



row, like tbe leaves of 



Struthiopteris germanica. 



Portion of a pinna with the 



, , ., . rolled margins coverine the 



a book, tbe nmer ones gori. 



with a large median Magnified 40 diameters. 



aperture (?),tbe outer 



not being perforated but sculptured. 



S. c7?/;je2<s (PI. 18. fig. 50 a, />) ; S.divisum 



(%. 50 (?) ; S. eccetitricum (fig. 50 (f). It is 

 uncertain whether the so-called inner valves 

 are merely hoops, or tbe valves of imperfectly 

 separated frustvdes ; also whether tliey are 

 perforated or not, for neither Ebrenberg nor 

 Kiitzing can be relied on for distinguishing 

 aperforation, as evidenced by their erroneous 

 description of tbe structure of the valves 

 of Piiinularia, Grammatophora, and many 

 other IJiatomacese. 



Three species are described, occurring in 

 America and Siberia. The sculpturings 

 upon the outer valves consist of radiating 

 or excentric curved lines. 



Bibl. Ebr. Ber. Berl. Ak. 1845; id. 

 Mikroff.; Kiitz. Sp.Alff. Id', Rahenht. Alg. 

 i. 302. 



STYLOB'RYON=Dmoi/7/on pt. 



STYLOCHO'NA, Kt.— Like Sjnrochona, 

 but with distinct stalks. 2 species ; on 

 Kehalia and Gammarus. (Kent, Inf. 662.) 



STYLOCHRY'S'ALIS, Stein.— A genus 

 of Flagellate Infusoria. Ovate, pedicled ; 

 flageUa 2, equal ; two lateral pigment-bands ; 

 freshwater. *S'. parnsita, on Eudorina ele- 

 gans. (Kent, Inf. 405.) 



STYLO'COLA, De From.— A genus of 

 Peritricbous Infusoria. Body as in Tagi- 

 nicola, but attached to tbe sheath by nume- 

 rous fibres. Two species; freshwater. (Kent, 

 Inf. 730.) 



"STYLONE'THES, Sterki.— A genus of 

 Hvpotrichous Infusoria. S. tardus. (Kent, 

 Inf 782.) 



■STYLONICHIA, Ebr.— A genus of Hy- 

 potricbous Infusoria, fani. Oxvtricbina. 



Char. Body ciliated, and furnished with 

 styles and hooks. 



In tins genus, transverse and longitudinal 

 division, gemmation, and tbe encysting pro- 

 cess have been observed. 



S. mgtilus=Kerona mijtilns, D. (PI. 31. 

 figs. 27, 28). Body wliite, hyaline at each 

 end, flat, oblong, slightly constricted in tbe 

 middle, dilated at the obbque fore part ; 

 fresbwater; length 1-240 to 1-100". 



S. pustuJata-=Kerona pnsful. B. (PI 31. 

 fig. 26). Body white, turbid, oblong, witli 

 a median ventral band of books ; fr. wat. ; 

 length 1-144". 



S. histrio (PI. 31. fig. 29). Body wbite, 

 elliptical-oblong, hoolfs aggregated into an 

 anterior heap ; no setse ; fr. wat. ; length 

 1-290 to-1220"; probably a variety of >S'. 

 pnstidata. 



S. lanceolata (PI. 31. fig. 30). Body 

 lanceolate, pale green, obtuse at tbe ends; 

 central surface flat ; hooks acervate near 



