EUGLENIA. 



[ 306 ] 



EUPLOTES. 



EUGLE'NIA, Duj. (Infusoria). See 



ASTASLSSA. 



The essential character of this family is 

 the presence of a contractile integument; 

 this is probably of little importance, as in 

 many cases the nature of the integument 

 has been shown to depend upon season, 

 locality, and stage of development. 



EU'GLYPHA, Duj. A genus of Rhi- 

 zopoda. 



Char. Free ; single ; carapace membra- 

 nous, transparent, resisting, elongate-ovoid, 

 urceolate, covered with rows of tubercles 

 or depressions ; orifice toothed ; expansions 

 numerous, simple. 



This genus appears unnecessarily sepa- 

 rated from Dffiugia, E. 



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

 covered with oblique or longitudinal rows 

 of rounded tubercles. Freshwater ; length 

 1-280". Sometimes posterior spines are 

 present. 



E. alveolata (PI. 30. fig. 64). Carapace 

 covered with polygonal depressions, in re- 

 gular oblique rows. Freshwater; length 

 1-280". Posterior spines also present. 



See DIFFLUGIA. 



BIBL. Dujard. Inf. 251 ; Carter, Ann. N. 

 Hist. 1865, xv. 290. 



EUMERID TON, Kiitz. Consolidated 

 with MERIDION. 



EUNO'TIA, Ehr. A genus of Diato- 

 maceae. 



Char. Frustules free, single or binate, 

 quadrilateral ; linear or linear-oblong in 

 front view, curved or concavo-convex in 

 side view ; valves with terminal puucta 

 (nodules?) and transverse or slightly ra- 

 diating striae, but no canaliculi. Fresh- 

 water and fossil. Allied to Ejnthemia. 



Many of the species have undulations or 

 ridges upon the convex surfaces ; striae re- 

 solvable into dots, but in some species diffi- 

 cult to detect ; transverse section of frustule 

 trapezoidal. 



Kiitzing describes forty-four species; 

 Smith admits seven as British. 



E. tetraodon (Himantidium tetr., K.) (PI. 

 61. fig. 27 : 0, side view ; 6, front view). 

 Frustules with four ridges ; striae distinct ; 

 length 1-570". 



E. monodon (Himant. monodon, K.). Side 

 view lunate, no ridges, slightly constricted 

 near the obtuse ends ; striae obscure ; length 

 1-800". 



E. triodon. Ridges three ; ends attenuate, 

 rounded; striae obscure; length 1-500". 

 BIBL. Kiitzing, Batill. 36, and Sp. Alg. 



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

 H. 1844, xiii. 459. 



EUNOTOGRAMMA, Weisse. A genus 

 of fossil Diatomaceae. 



Char. Front view as in Anaulus; side 

 view lunate, with undulated dorsal and 

 ventral margins. 



E. tri-, quinque-, septem-, et novemlociilata. 

 Side view divided by 2, 4, 6, or 8 transverse 

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



BIBL. Pritchard, Infus. 860; Weisse, 

 Bull St. Petersbotirg, xiii. 278. 



EUODIA, Bailey. A genus of Diato- 

 maceae. 



Char. Frustules areolar or granular, side 

 view lunate. 



3 species: 2 fossil, 1 recent. Perhaps 

 Goniothecia. 



BIBL. Bailey, Pritchard's Infus. 852; 

 Greville, Micr. Tram. 1861, 67. 



ELTPLEURIA, Arn. A genus of Diato- 

 maceae. 



3 species : New Zealand and Africa (Icha- 

 boe guano). 



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

 EUPLO'TA, Ehr. A family of Infu- 

 soria. 



Char. Body surrounded by a carapace ; 

 two distinct alimentary orifices, neither of 

 which is terminal ( = Oxy trichina 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, 

 claws, or 

 hooks 



teeth 



-v 



1 Head distinct ...Dixcocephalus. 



> NQ dutinct h e &d.Himantophorus. 



JoTty^es. I Mouth with teeth CMamidodon. 



Cilia, claws, and styles present Euplotes. 



Dujardin includes this family in his Ploes- 

 conina. 



BIBL. Ehrenb. Infus. 374; Dujard. Inf. 

 429. 



EUPLOTES, Ehr. (Plcesconia, 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. (Plcesconia pat., D.) (PI. 31. 

 fig. 5 : , 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 with fine radiating striae ; cilia form- 



