LOPHOCOLEA. 



[ 401 ] 



LUNGS. 



allied genera by the remarkable form of the 

 perithecia. 



BIBL. Berk. Brit. Flor. ii. pt. 2. p. 280; 

 Fries, Syst. Myc. ii. p. 533, Summa Veg. p. 

 401; Greville, Sc. Crypt. Flor. pi. 177- 



LOPHOCOLEA, Nees. A genus of 

 Jungermannieae(Hepaticaceae), including the 

 J. bidentata, L. and J. heterophylla, Schrad., 

 growing in moist situations, at the roots of 

 trees, &c. 



BIBL. Hook. Brit. Jungerm. pi. 30, 31, 

 Brit. Flor. ii. pt. 1. p. 122. 



LORICA. See CARAPACE. 



LOUSE. See PEDICULUS and ANO- 

 PLURA. 



LOXODES, Ehr. A genus of Infusoria, 

 of the family Trachelina. 



Char. Body covered with rows of cilia; 

 no teeth ; anterior and upper portion of the 

 body (lip) obliquely truncate, or bent towards 

 one side (hatchet-shaped, E.), and with a row 

 of large cilia. Ehrenberg describes four 

 species. 



L. bursaria, E. (Paramecium bursaria, 

 Focke) (PI. 24. fig. 41). Oblong, green, 

 anterior end depressed and obliquely trun- 

 cate, posterior end rounded and turgid; 

 aquatic; length 1-288". 



The rotation of the contents of the body 

 takes place in this infusorium. Repro- 

 duction by the formation of swarm-germs, 

 according to the process 2 b (p. 235), has also 

 been observed. 



L. rostrum, E. (Pelecida rostrum, D.) (PL 

 24. fig. 39). White, lanceolate, anterior por- 

 tion bent on one side ; aquatic ; length 1-144 

 to 1-60". 



Dujardin's genus Loxodes does not agree 

 with that of Ehrenberg ; but, according to 

 Stein, the observations upon which the dif- 

 ferences are founded depend upon faulty 

 observation. 



Thus L. cucullulus, D. and L. dentatus, D. 

 (PL 24. fig. 40) are young states of Chilodon 

 cucullulus, E. ; and L. reticulatus, D. is the 

 same infusorium distended with alimentary 

 matters. 



BIBL. Ehrenberg, Infus. p. 323; Dujar- 

 din, Infus. p. 449 ; Stein, Infus. p. 238, &c. 

 and the Bibl. 



LOXOPHYLLUM, Duj. A genus of 

 Infusoria, of the family Paramecia. 



The species belong to the genera Amphi- 

 leptus, E. and Trachelius, E. See PARA- 

 MECIA. 



BIBL. Dujardin, Infus. p. 487. 



LOXSOMA, R. Brown. A genus of Hy- 

 menophyllaceous Ferns, distinguished by the 



projecting column bearing the sporangia 

 (figs. 419, 420). 



Fig. 418. Fig. 419. 



Fig. 420. 



Loxsoma Cunningham!!. 



Fig. 418. A pinnule with marginal sori. Magn. 5diams. 

 Fig. 41Q. A sorus opened. Magn. 25 diams. 

 Fig. 420. Columella with sporanges. Magn. 50 diams. 



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 

 not all possess the same minute structure. 

 The thyroid, cricoid, and arytenoid cartilages 

 consist of true cartilage, the basis being 

 homogeneous, and containing disseminated 

 cartilage corpuscles. The walls of the cor- 

 puscles are usually thick. The basis often 

 becomes fibrous, and both corpuscles and 

 basis encrusted with calcareous salts, or 

 completely ossified. Their perichondrium is 

 firm, and is composed of areolar tissue, with 

 fine elastic fibres, vessels, and nerves. 



The epiglottis (PI. 40. fig. 40), and the 

 appendices of the arytenoid consist of fibro- 

 cartilage ; and the corpuscles are frequently 

 more or less filled up by secondary deposit. 



The mucous membrane, as also the sub- 

 mucous tissue of the larynx, consists of 

 areolar tissue with networks of fine elastic 

 fibres ; at the surface it becomes more ho- 



2o 



