LIMNOCIILIDE. 



[ 397 ] 



LITIIOFELLINIC ACID. 



animal making its appearance at the end of 

 fifteen da3^s. 



BiBL. Duges, Ann. d. Sc. nat. 2 ser. 

 i. p. 159 ; Gervais, Walckenaer's Arachn. 

 p. 208 ; Koch, Deutschlands Crustac, ^-c. 



LIMNOCHLIDE, Kutz. See Aphani- 



ZOMENON. 



LINDIA, Duj. — A genus of Rotatoria, of 

 the family Hydatinsea, E.(Furcularina, Duj.)- 



Char. Body ol)long, almost vermiform, 

 ^yith transverse folds, rounded in front, but 

 no rotatory organ, cilia or eye; tail-like foot 

 with two conical and short segments or toes ; 

 jaws very complicated (and imperfectly de- 

 scribed). 



L. torulosa (PI. 34. fig. 40). Aquatic; 

 length 1-75". 



BiBL. Dujardin, Infus. p. 653. 



LINDS^EA, Dryander. — A genus of Lind- 

 saeeae (Polypodaeous Ferns). Exotic (fig. 408). 



LINDSxEEiE.— A sub-tribe of Polypo- 

 daeous Ferns with indusiate sori. 



ScHizoLOMA. Sorus infra- marginal, li- 

 near, continuous. Indusium linear, elon- 

 gated, continuous, parallel with the margin 

 of the leaf, free outside. Veins anastomo- 

 sing in hexagonoid meshes. 



DiCTYOxiPHiuM. Sorus infra-marginal, 

 linear, continuous. Indusium linear, elon- 

 gated, continuous, parallel to the margin of 

 the leaf, free outside. Veins anastomosing, 

 with free venules. 



LiNDSiEA. Sorus infra-marginal, linear, 

 continuous. Indusium linear, elongated. 



Fig. 408. 



Lindssea. 

 A pinnule. Magn. 10 diams. 



continuous, parallel with the margin of the 

 leafjfree outside. Veins dichotomous(fig,408). 



LINUM, L. See Flax. 



LIOTHEUM, Nitzsch.— A genus of In- 

 sects, of the order Anoplura, and family 

 Liotheidae. 



Char. Antennae clavate or capitate ; max- 

 illary palpi conspicuous ; mouth with strong 

 mandibles; tarsi with two claws. 



Antennae four-jointed; mandibles with two 

 teeth; maxillarypalpiloug,filiform,4-jointed ; 

 labial paljn very short, two-jointed. 



The genus has been subdivided into seven 

 subgenera. The species are very numerous, 

 and are parasitic upon birds. 



L. {Menopon) 2)allidum (PL 28. fig. /)• 

 Elongate, of a pale straw colour, shining and 

 smooth ; head slightly sinuate on each side, 

 with a dark pitchy spot before each eye. 

 Length 1-24 to 1-16". Common upon the 

 domestic fowl. 



BiBL. Denny, Anoplur. Monographia, 

 p. 204. 



LITHIC ACID. See Uric Acid. 



LITHOBROCHYA, Presl.— A genus of 

 Pterideffi (Polypodaeous Ferns). Exotic. 



LITIIOCYSTIS, Allm.— A genus of Co- 

 rallinaceae (Florideous Algae), consisting of a 

 single species, L. Allmanni, Hass., which 

 has been found as an epiphyte, forming 

 minute white dots upon Chrysimenia clavel- 

 losa. The minute dots consist of one or 

 more fan-shaped fronds composed of square 

 cells. The i)lant is colourless, brittle, and 

 effervesces in acid. The fan-siiaped frond 

 somewhat resembles in structure imperfect 

 or segmental fronds of Coleoch^te. 



BiBL. Hass. Brit. Mar. Alg. p. 111. pi. 

 14 B; Phyc. Brit. pi. 166. 



LITHODESMIUM, Ehr.— A genus of 

 Diatomaceae. 



Char. Frustules in side view triangular, 

 united so as to form a prismatic filament. 

 Marine. 



h. undulatum (PI. 13. fig. 4 a, front view, 

 4 h, side view). Surface without markings, 

 very pellucid, two of the sides undulate, the 

 third plane and with two marginal notches ; 

 angles obtuse; length of joints 1-480". 



This organism requires fLui;her examina- 

 tion ; its Diatomaceous structuie is very 

 obscure. 



BiBL. Ehrenberg, Ahhandl. d. Berl. Akad. 

 1840; Kiitzing, Bacill. p. 135, and Sjj. Alg. 

 p. 133. 



LITHOFELLINIC ACID.— This sub- 

 stance is a component of certain concretions 

 called bezoars, and found in the alimentary 

 canal of various kinds of goat in the East, as 

 in Persia, &c. 



It is crystalline, insoluble in water, readily 

 so in hot alcohol, but little in aether. 



The perfect crystals form six-sided prisms 

 with truncated ends ; but when somewhat 



