HERPETOMONAS. 



[ 391 ] 



HETEROSTOMELLA. 



BiBL. Hooker, Br. Jung. I. c. ; Eud- 

 liclit'i', Oen riant, uos. 472-'J ; Ekart, Syn. 

 Jum/. pi. •i. iiu's. ^1, '2'2. 



liEKPJ-yrO'MONAS, Kt.— A geuu3 of 

 Flagellate Ini'usoria. 



Char. Iree, elongate or vermicular, 

 highly llexible ; iiagelluin single. 



H. intiscce, in the intestine of the house-fly. 

 H. Lewisi (PI. 53. fig. 18), in the blood 

 of Indian rats ; perhaps also in the blood 

 of the lield-mouse and mole; 1. 1-1500". 

 (Kent, Infus. 245 ; Lewis, Qu. Mic. Jn. 

 1870.) 



HETEROCORDY'LE, Allm.— A genus 

 of llydroid Zoophj-tes, fam. Atractylidas. 



H. Conyheurei. Ou old shells ; marine. 

 Ireland. 



BiBL. Allman, Ann. N. H. 1864, xiv. 

 59 : Hiucks, Brit. Zooph. 107. 



ilETERODES'jlUS, Brady.— A genus 

 of recent Ostracode Entomostraca, family 

 Cypridinida; ; subglobose, with the hinges 

 of the valves developed into large processes 

 at the dorsal angles. 



H. Adamsii. Sea of Japan. 



BiBL. Bradv, Zool. Trans, v. p. 387. 



HETEKU1)1C'TY0X, Grev.— A genus 

 of Biatomaceas. 



Char. Fr. free, disciform ; disk with 

 radiate or scattered puncta in the middle 

 portion, and a ring of large intra-margiual 

 cell ides. 



//. Rylandsianum and H. splendidmn. 

 Barbadoes deposit. 



BiBL. Grev. Mic. Tr. 1863, iii. 66 (fig.). 



IIETEROMAS'TIX, Clk.— A genus of 

 Cilio-flagellate Infusoria ; corresponding to 

 a Euylena with two anterior flagella, one 

 trailing; and an anterior oral fringe of cilia. 



II. pruteiformis, in fresh water. (James- 

 Clark, Mein. Bost. Soc. N. H. 1868 ; Kent, 

 Infus. 403.) 



"HETERO'MITA, Duj.— A genus of Fla- 

 gellate Infusoria. 



Char. Body globular, ovoid, or oblong, 

 with two filaments arising from the same 

 point in front — one, more delicate, and with 

 an imdulatory motion, causing' progression ; 

 the other thicker, and floating freely be- 

 hind, or adhering here and there to the 

 slide, so as to produce by its contraction 

 sudden motion backwards. 



Distinguished from Anisonema and Ilete- 

 ronema by the absence of a tegument, shown 

 bv the glutinous appearance of the body, 

 the facility with which it adheres to other 

 objects and becomes drawn out, and the 

 presence iaterually of certaiu corpuscles 



which can only have entered by vacuola 

 formed on tbe surface. 



Found in both fresh and salt water, and 

 in lish-maceratious, 



H. ovata=Bodo graudis, E. (PI. 30. fig. 

 18 a) ; among freshwater plants. 



//. granulosa. Body globular, surface 

 granular; marine; length 1-2300". 



H. angusta. Body lanceolate, .slightly 

 sigmoid; freshwater; length 1-980". 



Other species. 



BiBL. Dujardiu, ////(W. 297; Kent, iw/ws. 

 290. 



HETERONE'MA, Duj.— A genus of 

 Flagellate Infusoria, of the family Euglenia. 



Char. Form variable, oblong, irregularly 

 expanded posteriorly ; with a slender flagel- 

 liform filament, and a thicker trailing, re- 

 tracting filament ; tegument obliquely stri- 

 ated. 



Differs from Heteromita in the presence 

 of a tegument, and from Anisonema in the 

 tegument being contractile. 



H. marina (PL 31. fig. 17). Filaments 

 longer than the body; length 1-4300". 



BiBL. Dujardin, Infus. 370; Kent, Inf. 

 430. 



HETEROTHRYS, Archer.— A genus of 

 freshwater Rhizopoda. 2 species. 



BiBL. Ai-cher, Qu. Mie. Jn. 1869, Lx. 267 



HET'EROPUS, Newp. — A genus of 

 Acaviua. 



H. ventricosus occurs in the nests of An- 

 thophora rettisa, living upon the larvae. 

 (Newport, Linn. Tr. 1850 ; Mm'ray, Ec, 

 Ent. 290, figs.) 



HETEROSTEGI'NA, D'Orb.— A flat, 

 discoidal Nummuline Foraminifer, with 

 whorls rapidly increasing in breadth and 

 reticulated by the primary and secondary 

 septa of the narrow carved chambers and 

 their rectangular partitions. Living in tiie 

 Eastern Archipelago ; fossil in the Tertiary 

 beds, especially forming one stratum in the 

 island of Malta. 



BiBL. Carpenter, Intr. For. 288 ; Jones, 

 Geol. Maq. ii. 151. 



HETE'ROSTOMEL'LA, Reuss.— One of 

 the Textularian Foraminifera, in which the 

 chambers are at first set on alternately, but 

 not neatly, on either side of a straight axis, 

 and afterwards, gro"wing in a single row, as 

 in Bigenerina, not only open terminally, in- 

 stead of laterally, but have a tubular, and 

 even a lipped, aperture, such as we see in 

 Uvigerina. Shell often prickly. Fossil in 

 the Chalk of Europe and America. 



