EUGLENIA, 



[ 306 ] 



EUPLOTES. 



EUGLE'NIA, Duj. (Infusoria). See 



ASTASI^A. 



The essential cliaracter of this family is 

 the presence of a contiactile integument; 

 this is probably of little importance, as in 

 many cases the nature of the integument 

 has been shown to depend upon season, 

 locaUtv, and stage of development. 



EU'GLYPHA, Duj.— A genus of Rhi- 

 zopoda. 



Char. Free ; single ; carapace membra- 

 nous, transparent, resisting, elongate-ovoid, 

 iirceolate, covered with rows of tubercles 

 or depressions ; orifice toothed ; expansions 

 munerous, simple. 



This genus appears unnecessarily sepa- 

 rated from Diffiugia, E. 



E. fMbercuIata (PI. 30. fig. 53). Carapace 

 covered with oblique or longitudinal rows 

 of rounded tubercles. Freshwater ; length 

 1-280". Sometimes posterior spines are 

 present. 



E. alveokita (PI. 30. fig. 54). Carapace 

 covered Avith polygonal depressions, in re- 

 gular oblique rows. Freshwater; length 

 1-280". Posterior spines also present. 



See DiFFLUGiA. 



BiBL. Dujard. Ltf. 251; Carter, ^«?j. iV". 

 Hist. 1805, XV. 290. 



EUMEEID 'ION, Kiitz. — Consolidated 

 with Meridion. 



EUNO'TIA, Ehr.— A genus of Diato- 

 macete. 



Char. Frustules free, single or binate, 

 quadrilateral ; linear or linear-oblong in 

 front view, curved or concavo-convex in 

 side view ; valves with terminal puncta 

 (nodules ?) and transverse or slightly ra- 

 diating striae, but no canaliculi. Fresh- 

 water and fossil. Allied to Epithemia. 



Many of the species have undulations or 

 ridges upon the convex surfaces; stria3 re- 

 solvable into dots, but in some species diffi- 

 cult to detect ; transverse section of frustule 

 trapezoidal. 



Kiitziug describes forty-four species ; 

 Smith admits seven as British. 



E. tetraodon {Himanfidium Mr., K.") (PI. 

 51. fig. 27: a, side view; i, front view). 

 Frustules with four ridges ; striae distmct ; 

 length 1-570". 



E. vwnodon {Himant. monodo7i, K.). Side 

 view lunate, no ridges, sliglitly constricted 

 near the obtuse ends ; slriie obscure ; length 

 1-800". 



E. triodon. Bidges three; ends attenuate, 

 rounded; striae obscure; length 1-500". 

 BiBL. Kiitzing, Bacill. 3(3, and Sp. Al;/. 



4 ; Smith, Brit. Dial. i. 15 ; Ralfs, Ann. N. 

 H. 1844, xiii. 450. 



EUXOTOGRAMMA, Weisse.— A genus 

 of fossil Biatomaceae. 



Char. Front view as in Anatdiis', side 

 \iew lunate, with undulated dorsal and 

 ventral margins. 



E. tri-, qidnque-y septem-, et 7iovemIocidata. 

 Side view divided by 2, 4, 0, or 8 transverse 

 septa into 3, 5, 7 or 9 loculi. Russia. 



BiBL. Pritchard, In/us. 860; Weisse, 

 Bull. St. Petersbonrg, xiii. 278. 



EUODIA, Bailey.— A genus of Diato- 

 macefe. 



CJiar. Frustules areolar or granular, side 

 view lunate. 



3 species: 2 fossil, 1 recent. Perhaps 

 Ooniothecia. 



BiBL. Bailey, Pritchard's Infus. 852; 

 Greville, Micr. Trails. 1861, 67. 



EUPLEURIA, Am.— A genus of Biato- 

 maceae. 



3 species : New Zealand and Africa (Icha- 

 boe guano). 



BiBi,. Arnott, Qu.Mic.Jn. 1858, vi. 89. 

 EUPLO'TA, Ehr.— A family of Infu- 

 soria. 



Char. Body surroimded by a carapace ; 

 two distinct alimentary orifices, neither of 

 which is terminal ( = Oxytrichiua with a 

 carapace). 



Locomotive organs consisting of cilia, 

 hooks, claws, or styles. Dujardin states 

 that the carapace undergoes diffluence like 

 the substance .of the body. 



The genera are thus distinguished : — 



Cilia, fArouth ) 



claws, or J "^. I , ( Head distinot ...Discocephahis. 



hooks N fp >f h \ ^o distinct head. Hiininitophoriis. 



noTn"es [ Mouth with teeth Chlamidodoii. 



Cilia, claws, and styles present Euplotes. 



Dujardin includes this family in his Ploes- 

 conina. 



BiBL. Ehrenb. Infus. 374 ; Dujard. Inf. 

 429. 



EUPLO'TES, Ehr. (Ilccscama, Duj., for 

 the most part). — A genus of Infusoria, of 

 the family Euplota, E. 



Char. Furnished with cilia, styles, and 

 hooks ; teeth absent. 



The species are very numerous. 



E. patella, E. (Plcesconmpat., D.) (PI. 31. 

 fig. 5 : a, under view ; b, side view). Cara- 

 pace a testa, oval or suborbicular, slightly 

 truncated in front, margins extending be- 

 yond the depressed body ; dorsum raised or 

 bossed •vvith fine radiating striae ; cUia form- 



