ENTEROBRYUS. 



[ 285 ] 



ENTOMOSTRACA. 



with red eye-spots behind the head; spicule 

 single. 



P. micans. Eye-spots contiguous; cirrhi 

 two. In the intestine of the larva of a 

 neuropterous insect. 



P. barbiger. Cirrhi four ; red spots se- 

 parate. In stagnant water. 



Enchilid'ium. Filiform, a single red eye- 

 spot, as broad as the body, situate at some 

 distance from the head. Marine. 



See ANGUILLTILLDJE. 



BIBL. Dujardin, Helminth. 236; Nord- 

 mann, Lamarck's Anim. sans Vert. iii. 564 ; 

 Bastian, Linn. Tr. xxv. 73. 



ENTEROBRY'US, Leidy. A supposed 

 genus of Kiitzing's Leptomitese, probably 

 the mycelium of some fungus, found in the 

 intestines of insects. 



ECCRI'XA, Leidy, is another of these 

 forms. 



BIBL. Leidy, Proc. N. H. Soc. Philadel 

 1849, 225, Ann. N. H. 1850, v. 72 ; Robin, 

 Veget. Paras. 1853, 395, pi. 4. figs. 5, 6. 



ENTERO'COLA, Van Ben. A genus 

 of Copepodous Entomostraca. 



E. ei-uca, is found adhering to the intes- 

 tine of Ascidia intestinalis. (Brady, Cope- 

 poda, Ray Soc. i. 147.) 



ENTE'ROMORTHA, Link. A genus of 



Ulvacese (Confervoid Algae), consisting of 

 freshwater and marine plants, with branch- 

 ed, tubular, green fronds, the walls of the 

 tubes being composed of a single flat layer 

 of polygonal cells. Reproduction by ciliated 

 zoospores, formed in considerable numbers 

 from the transformed contents of the cells 

 (PI. 9. fig. 4). In this genus, Thuret states 

 that two forms of zoospores occur, one 

 large and four-ciliated ; the other, in fronds 

 with a yellower tint, smaller and with two 

 cilia; both kinds germinate. The zoospores 

 escape from the cells by a pore on the outer 

 surface (PI. 9. fig. 4 a) near the centre of 

 the cells ; and the latter persist for some 

 time in an empty condition. The marine 

 forms, of which nine species are described 

 by Harvey, are mostly from 1-2" 'to several 

 lines in diameter, but many inches long. 

 E. Grevtilei, Thuret (Ulva Lactuca, Grev., 

 Harv.), however, is thicker and saccate, 

 finally bursting. E. intestinalis, which 

 grows both in the sea and in brackish- and 

 freshwater ditches, often attains a length of 

 2 feet and more, and varies in thickness 

 from 1'" to 2-3". 



BIBL. Harvey, Mar. Alg. 213, pi. 25 D, 

 Phyc. Brit. pis. 63, 262, 282 ; Greville, Alg. 

 Brit. 179, Sc. Crypt. Fl. t. 313, Eng. Sot. 



2137 & 2328 ; Thuret, Ann. Sc. Nat. 3 se*r. 

 xiv. 224, pi. 20. figs. 8-12 ; Mem. de Cher- 

 bourg, ii. ; Rabenhorst, Fl. Alg. iii. 312. 



ENTERO'PLEA, Ehr. A genus of Ro- 

 tatoria, of the family Hydatingea. 



Char. Eye-spots none; teeth absent; foot 

 forked. 



E. hydatina (PL 43. fig. 27). Body co- 

 nical, hyaline ; foot small; aquatic; length 



1-120": 



Probably the male of Hydatina. 



BIBL. Ehrenb. In/us, p. 411. 



ENTODIN'IUM, Stein. A genus of Pe- 

 ritrichous Infusoria. 



Char. Free, ovate, flattened; surface 

 smooth, indurated ; often with one or more 

 terminal spines. Three species ; in the ru- 

 men and reticulum of Ruminants. 



BIBL. Stein, Inf. ii. 168; Kent, Inf. 

 653. 



ENTOGO'NIA, Grev. A genus of fossil 

 Diatomaceae. 



Char. Frustules in side view triangular, 

 containing a central triangular figure, having 

 a broad border divided by transverse costae 

 into punctate or cellulate compartments : 

 = species of Triceratium. 



11 species. Barbadoes. 



BIBL. Greville, Qu. Mic. Jn. 1863, 235 

 (figs.). 



EN'TOMIS, Jones. An extinct bivalved 

 Entomostracan, known by its oval, trans- 

 versely sulcate, and sometimes concentri- 

 cally wrinkled valves. The sulcus is nuchal 

 and much stronger than in some of the Cy- 

 pridiniform allies marked with this feature. 

 Silurian, Devonian, and Carboniferous. 



BIBL. Jones, Mem. Geol. Surv. Edinb. 

 1861, 137 ; Ann. N. H. 1879, iv. 183. 



ENTOMONE'IS, Ehr.=Amphiprora, pt 



ENTOMOSTE'GIA. One of D'Or- 

 bigny's orders of Foraminifera, having the 

 chambers in two rows, alternate, coiled 

 into a spiral. This alternation of chambers, 

 however, in the coiled Foraminifera arises 

 from very different modes of growth, and 

 is not a group-character. It is due : 1 to 

 bilateral asymmetry (Cassidulina'} ; 2, to 

 lateral elongation and intercalation of the 

 chambers in Robertina (Bulimind) 3, to 

 extreme alar division with interdigitation 

 of the chambers on one face (Amphistegina) j 

 4, to irregular growth of semi-annular 

 chambers (Heterostegina) ; and 5, to tent- 

 like cavities under umbilical flaps (Asterige- 

 rind). 



ENTOMOSTRACA. A division of the 

 class Crustacea. 



