EOSINE. 



[ 292 ] EPENDYMA YENTEICULORUM. 



branched ; male and female organs in 

 each individual. 



Ainphistuma, DipJozoon (Diporpa), 

 Distoma {Cercarin), Gyrodactijlus. 



Earn. 3. Acanthocephala. Body flat- 

 tened, transversely "wrinkled, becoming 

 cylindrically distended by the imbibi- 

 tion of water ; sexual organs in separate 

 individuals. 



Ech in orhyn ch us. 



Order 2. Coelelmintha. Alimentary canal 

 present, distinct, simple, with two oritices. 



Earn. 4. Nematoidea (roiuid worms). Body 

 cylindrical, hollow ; sexes separate. 



Trichocephalus, l''{layia,Ascaris{ Oxy- 

 urus), AngiiUhda, Trichina, Anchyh- 

 stoma, Dochmius. 



See AcEPHALocYSTS and E^TOPLIT)^. 

 BiBL. Siebold, Vergl. An. ; Eudolphi, 

 Enfoz. Hist. Nat. and Entoz. Si/n. ; Dujardin, 

 Hchninth. ; Bremser, Icones Hehninth. ; 

 Owen, Todd''s Cyci.\i.l\\; Blanchard, ^;^?^. 

 Sc. Nat. 3 ser. Zool. vii. viii. x. xi. xii. ; 

 Diesing, Helminth. ; Vogt, Zool. Briefe ; 

 Beneden, Vers cesto'i'des, 1850 ; id., Vers in- 

 testin. (27 pL), and Icon. d. Hehn. 18G0; 

 Pagenstecher, Trevudod-Larvcn ; Kiichen- 

 meister, Farasiten, 1881 ; Cobbold, Para- 

 sites; Ebertli, Nematoden, 18G3 ; Schneider, 

 Nematoden (22 pi., 130 cuts), 1860 ; Pa- 

 vaine, Entozoaires, 1877 ; Linstow, Hehnin- 

 thol. 1878; Wagener, Cestodcn (22 pi.) ; 

 Leuckart, Menschl. Parasit. 1881. 



EO'SINE. — A beautiful rosy dye, having 

 the composition of tetiabromo-lluorescine, 

 produced by the action of bromine upon 

 nuorescine dissolved in acetic acid. It is a 

 ra])id staining agent, dyeing the protojilasm 

 of nucleated blood-corpuscles, but not the 

 nuclei ; it is also useful in the distinction of 

 nerve-structures. 



BiBL. Gibbes, Hist.; Dreschfeld, Jn. Anat. 

 xi.; Watts, IHct.Chem.; W'issozky, Schultze's 

 Arch. 1877, xiii. 479. 



EOS'PHORA, Ehr.— A genus of llota- 

 toria, of the family Hydatiufea. 



Char. Eyes three, sessile — two frontal, 

 one cervical ; foot forked. Ereshwater. 

 Among Confervcs. 



There are three species. 



E. dif/itafa (PI. 4:5. fig. 28 : fig. 29, teeth). 

 Body conical, liyaliiie, not aiiricled, toes 



one third of the foot in length. 

 l-'JG". 



BiBX,. Ehr. Infits. p^ 451. 



Length 



EOZO'ON,Dawson.— AEoraniinifer,with 

 hyaline and tubular shell-structure, and 

 very numerous irregiUai' chambers. Out- 

 spread for about a square foot, and hea;ped 

 up nearly half as high, with diminishmg 

 size, it occurs imbedded in the Lauren- 

 tian and other old limestones of Canada, 

 Bohemia, &c. The chambers, stolons, 

 pseudopodial passages, and canal-system are 

 represented by delicate casts of magnesiau 

 silicates, such as pyroxene, serpentine, and 

 loganite ; sometimes by calcite, Uke that of 

 the shell itself. In the former case they 

 can be separated by the removal of the cal- 

 careous shell in slices of the marble, by 

 dilute acid. 



Layer after layer of Eozoon formed banks, 

 thus constituting a large proportion of the 

 massive limestones ; and the sarcode was 

 mostly replaced by hydrous silicates, such 

 as have been injected into the pores of Si- 

 liu'iau and other fossils, and just as glauco- 

 nite takes the place of the soft parts of 

 Eoraminifera, Polyzoa, &c. in existing 

 seas. The Eozoonal limestone, with , its 

 associated muds, sands, and shingle, has 

 been folded, crushed, and variously meta- 

 morphosed, often in a high degree. 



BiBL. Logan, Dawson, Carpenter, and 

 Hunt, Quart. Jn. Geol. Sac. 18G5, xxi. 45, 

 and 18G7, xxiii. 257 ; Carpenter, Intel. 

 Ohserv. 18Go, vii. 278: and Microscope, 1881; 

 Giimbel, Sitz. layer. Akad. 186G ; Zirkel, 

 Mineralien, 1873 ; Mcebius, Eoz. Can. 1878 ; 

 King and Eowney (disputing the organic 

 character of Eozoon), Proc. Pay. Irish 

 Acad. ser. 1. x. and ser. 2. i. ; & An Old 

 Chapter ^-c. 1881. 



EPEIRA, Walck.— A genus of Arach- 

 nida, of the order Araneidea. 



E. diadema (the common autumnal gar- 

 den-spider) forms a favomable object for 

 the examination of the various structural 

 pecidiarities of spiders, — as the integument 

 (PL G. fig. 4) ; the legs, with their hairs and 

 claws (fig. 8, a, b) ; the toothed hairs at 

 the end of the feet (fig. 8) show very clearly 

 the transition from the hairs to the claws, 

 in fact, that the latter are mere modifica- 

 tions of the former ; also the lung-plates 

 (figs. 9, 9 b) ; the spinnerets, the web (fig. 

 11), &c. 



BiBL. Walckenaer, Apteres ; Brandt, 

 Medizin. Zool. ; Walker, Brit. Sjrid. {Pay 

 Soc). 



EPEN'DYMA YENTEICULORUM is 



