LORICA. 



[ 477 ] 



LUNGS. 



orifices scattered ; ova elliptical, with a 

 ring, but no spines. 



BIBL. Allruan, Fresh. Polyzoa (Ray Soc.), 

 83; Johnston, Brit. Zooph. S9I. 



LORI '0 A. See CARAPACE. 



LOUSE. SeePEDicuLusandANOPLURA. 



LOVEXEL'LA, Hincks. A genus of 

 Campanulariidae (Hydroid Zoophytes). 



Char. Sterns simple or slightly branching, 

 rooted by a thread-like stolon ; capsules 

 turbinate, elongate, operculum of distinct 

 segments ; proboscis large and prominent. 

 L. clausa, in dredginsrs, Torbay. 



BIBL. Hincks, Brit Hyd. Zooph. 177. 



LOXOCEPH'ALUS, Eberh. A genus 

 of holotrichous Infusoria. 



Char. Free, ovate-oblong, constricted 

 towards the front, with one or more short 

 setae at the constriction, and one or more 

 caudal setae. 



Two species. Freshwater, with decaying 

 vegetation. (Kent, Inf. 488.) 



LOXOCON'CHA, Sara. A marine Os- 

 tracode, allied to Cythere, with long setife- 

 rous antennas, and strong subrhomboidal 

 valves, which have toothed hinges and often 

 a pitted surface. Common in the British 

 and other seas, and fossil in the Tertiary 

 and post-Tertiary strata. 



BIBL. Brady, Linn. Tr. xxvi. 432. 



LOXO'DES, Ehr. A genus of hypo- 

 trichous Infusoria, family Trachelina. 



Char. Body curved, with a longitudinal 

 row of transparent vesicles, each of which 

 contains a highly refracting body, and with 

 a more or less arborescent distribution of 

 the digestive canal. 



L. rostrum, Ehr., Pelecida rostrum, Duj. 

 (PI. 31. fig. 39) ; freshwater. 



L. bursaria (PI. 81. fig. 41) is a Parame- 

 cium. L. cucullulus and L. dentatus belong 

 to Chilodon. 



BIBL. Ehr. Inf. 323 ; Duj, Inf. 449 ; 

 Stein, Inf. ; Claparede et Lach. Inf. 339. 



LOXOPHYL'LUM, Duj. A genus of 

 holotrichous Infusoria, fam. Trachelina. 



Char. Body flat and leaf-like ; contractile 

 vesicle posterior, near the anus ; anterior 

 part of the body sometimes produced. 6 

 species. L.fasciola (PI. 30. fig. 10). They 

 belong to the genera Amphileptus and Tra- 

 chelius, Ehr. 



BIBL. Duj. Infus. 487; Claparede et 

 Lachmann, Infus'. 360; Kent, Inf. 527. 



LOXOSO'MA, Keferst A genus of 

 Polyzoa, fam. Pedicellinidae. Like Pedi- 

 ce/lina, but united in colonies. 3 species, 

 on marine annelida. (Hincks, Polyz. 572.) 



LOXSO'MA, Brown. A genus of Hy- 

 menophylleaa (Polypodiaceous Ferns), dis- 

 tinguished by the projecting column bearing 

 the sporangia (figs. 414 ; 415, 416). 



Fig. 414. 



Fig. 415. 



Loxsoma Cunninghamii. 



Fig. 414. A pinnule with marginal sori. Magn. 5 diams. 

 Fig. 415. A sorus opened. Magn. 25 diama. 

 Fig. 416. Columella with sporanges. Magn. 50 diams. 



New Zealand (Hooker, Syn. 56). 



LUCERNARIA, Fabricius. A genus of 

 Medusae. L. auricula is common in the 

 summer in the seas of England and Norway. 

 It can be kept for some time in an aqua- 

 rium, and from the small size of many indi- 

 viduals, is a very interesting object for the 

 microscope. 



BIBL. M. -Edwards & Haime, Coraill. iii. 

 457; Agassiz, Sea-side Stud., 1871, 46 j 

 Keferstein, Zeit. f. wiss. Zool. xii. 



LUMBRI'CUS. A genus of setigerous 

 Annulata. L. ten-estris, the earthworm. 

 Ray Lankester, Qit. Mic. Jn. 1864 & 1865 ; 

 Lockhart Clarke, Proc. Roy. Soc. 1857, 344 

 (nervous system) ; Rolleston, Forms of An. 

 Life. 



LUNGS. The internal respiratory sacs 

 of animals. 



Under this head we shall notice also the 

 larynx, trachea, and bronchi. 



Larynx. The cartilages of the larynx do 



