ENTOPHYTES. 



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] 



ENTOSTHODON. 



taining the ova and young; eye very 

 large ; legs four pairs, not contained 

 within the shell. 

 Fam. 3. Lynceid^. Superior antennae 

 very short ; inferior of moderate size, 

 branched, each branch three-jointed ; 

 legs five pairs ; eye single, with a black 

 spot in front; intestine convoluted, 

 having one complete turn and a half. 



Acroperus, Alona, Camptocercus, 

 Chydorus, Eurycercns, Peracantha, 

 Pleuroxus. 

 See Crustacea and Siphonostoma. 

 BiBL. Baird, Brit. Entomostr. ; M. -Ed- 

 wards, Hist. nat. d. Crustac. iii. ; Straus, 

 Mem. d. Mus. d. Hist. nat. 1819. v. p. 380, 

 and 1821,vii.p.33; Koch, Deutschl. Crustac; 

 Desmarest, Cons. Gen. s. I. Crustac. ; Jones, 

 Entom. of the Cretaceous form. {Palceontogr. 

 Soc.) ; Zenker, Midler's Archiv, 1851, 

 (Micr. Trans, i. p. 273), and the Bibl. of the 

 genera. 



ENTOPHYTES.— A general term applied 

 to parasitic plants (chiefly Fungi), growing 

 in the interior of animal or vegetable struc- 

 tures. See Parasites, vegetable. 



ENTOPLYA, Ehr.— A genus of Diato- 

 macese. 



Char. Frustules prismatic, compressed, 

 multivalve(?); valves contiguous, in a simple 

 straight series like the leaves of a book, the 

 inner ones with a very large median aperture, 

 the two end valves transversely striated, not 

 alike, one of them being convex outwards and 

 entire (not perforated), the other concave, 

 and with a large pore (?) at each end. 



It is stated to approach Achnanthes in the 

 curved form; in its tabellar form, Tessella, 

 and that it most nearly agrees with Biblarium, 

 E. australis {Surirella'^ austr. K.). Valves 

 linear, rounded at each end, with more than 

 forty transverse costae, traversed by a longi- 

 tudinal flexuous line; inner plates in the 

 adult state sixteen, in the yovmg state only 

 three ; marine, and found in guano ; length 

 1-240", in the young state 1-720", and with 

 only six costae between the pores. 



(The pores are probably only inflated pro- 

 ductions of the valves, like those of Biddul- 

 jjhia; and the plates are perhaps only hoops; 

 they are not valves, because the holes in 

 them are continuous, so that there is but a 

 single cavity in the frustule.) 



Bibl. Ehr. Ber. d. Berl. Akad. 1848. p. 6. 

 ENTOSELENIA, Ehr.— A genus of La- 

 genae. 



Char. Shell calcareous, globose or ovate, 

 sometimes compressed, with a tube arising 



from the orifice and projecting downwards 

 into the cavity of the shell. 



These elegant organisms are found living, 

 adlierent to marine algae, fuci, &c., and fossil 

 in sea-sand and mud. 



E . globosa {V\. 19; fig. 19 &, longitudinal 

 section). Shell ovato-globose, smooth, not 

 compressed ; mouth slightly projecting, ob- 

 tuse ; internal tube patulous at the extre- 

 mity, and sometimes reaching nearly the 

 bottom of the cavity. 



Very rare. Shell densely perforated with 

 very minute foramina; length 1-144''. 



E. marginata. Shell nearly orbicular, 

 smooth, compressed, surrounded by a thin 

 marginal layer; mouth slightly and gradually 

 produced ; internal tube usually curved ; 

 length 1-150". 



a. lucida. Elongate, pyriform, marginal 

 lamina thickened, tube mostly straight ; 

 length 1-80". 



E. lineata. Shell ovate, truncate, some- 

 times with a minute neck ; surface with fine 

 longitudinal striae; tube straight, nearly 

 reaching the bottom ; dull leaden colour ; 

 length 1-120". 



E. squamosa. Shell ovato-globose, neck 

 minute ; surface pitted, pits irregular in 

 form and arrangement ; tube patulous ; 

 length 1-127". 



a. catenulata (PI. 19. fig. 20). Pits very 

 small, square or hexagonal, arranged in lon- 

 gitudinal rows ; length 1-100". 



/3. scalariformis. Pits as in the last, but 

 few and large; length 1-115". 



y. hewagona (PL 19. fig. 23). Pits large, 

 hexagonal, not in distinct longitudinal rows; 

 length 1-130". 



Bibl. Williamson, Ann. Nat. Hist. 1848. 

 i. p. 1. 



ENTOSTHODON, Schwagr.— A genus 



Fig. 200. 



^X3 



Entosthodon Templetoni. 

 Fragment of the peristome. IMagTiified 100 diameters. 



of Funariaceae (Acrocarpous Mosses), inclu- 

 ding some of the Gymnostoma and Weissice 

 of authors. 



