KNIFE. 



[ 451 ] 



LAFOEA. 



KNIFE, VALENTIN'S. Introduc- 

 tion, p. xxvi. 



KONDYEOS'TOMA, Diij.— A geuiis of 

 Lifusoria, of the family Bursurina. 



Char. Body elongated, cylindrical or 

 fusiform, slightly arcuate, the ends obtuse 

 and depressed, with a very large mouth 

 margined with stout cilia, and situated late- 

 rally at the anterior end ; surface obliquely 

 strinted and ciliated. 



K. jMfcm (PL 31. fig. 31 ; fig. 32, slightly 

 compressed). 



BiBL. Duj. Infus. 51G; Clap, et Lacli. 

 Inf. 244. 



"KR A USE'S CORPUSCLES.— The ter- 

 minal bulbs of the nervous plexus and in- 

 terlacing nerve-tibres of tlie conjunctiva. 

 They consist of a connective-tissue sheath 

 with nuclei, au internal bulb of finely granu- 

 lar dull-shining material, within which is a 

 pale terminal fibre with a somewhat thick- 

 ened end. 



BiBL. Krause, U. term. Korper, 1868; 

 Strieker, Geu-ebe, ii. 123. 



KKITHE,B., C., and R. See Ilyobates. 



L. 



LABREL'LA, Fr.— A genus of Phaci- 

 diacei (Ascomycetous Fungi), growing upon 

 living leaves. L. Ptarmicce, Desm., grows 

 upon the leaves of AchiUea Ptarmica. 



BiBL. Berk. Ann. N. H. i. 208, pi. 7. 

 fig. 7 ; Fries, Stimma J^eq. 422. 



LABYRINTHODON'TA.— A group of 

 extinct Amphibia. Transverse sections of 

 the teeth of the species of this group are 

 beautiful microscopic objects. 



BiBL. Owen, Odontography. 



LABYRIN'THULA, Cieukow.— a ge- 

 nus or group of Protozoa. Composed of 

 microscopic, thin, reticular, colourless, rigid 

 filaments, on which fusiform bodies glide 

 very slowly in various directions ; the fila- 

 ments arise from imbedded globular red or 

 yellow masses. Two 

 posts; Odessa. 



BiBL. Oienkowski, Arch. mik. An. iii. 

 274. 



LACE-BARK. See Thymeleace^. 



LACINULARIA, Oken.— a genus of 

 Rotatoria, of the family Floscularifea. 



Char. Eyes two (when young); urceolior 

 gelatinous sheaths aggregated into a spheri- 

 cal mas,-< ; rotatory organs with two lobes. 



L. socialis (PI. .50. fig. 15). Urceoli ge- 

 latinous, yellowish ; rotatory organ veiy 

 broad, in the form of a horseshoe ; fr. wat. ; 

 length 1-36". 



species, on submerged 



BiBL. Ehrenb. Inf. 403; Huxley, Mic. 

 Jn. 1852 ; Leydig, Siehold mid KiHl. Zeit. 

 18.52 ; Ukedem, Ann. Set. N. 3 st5r. 1851 j 

 Cubitt, 31. Mic. Jn. 1872-73. 



LACRYMA'RIA, Bory.— A genus of 

 Infusoria, of the family Traclielina, Clap, et 

 Lach. 



Char. Body rounded behind, not ciliated; 

 with a long and slender neck, which is 

 dilated at the end, and furnished with a 

 ciliated mouth and a lip, but no teeth 

 (= Trachelocerca without a tail). 



L. proteus, syn. L. olor. Body oblong, 

 turgid, colourless, with delicate oblique 

 strise ; neck very long ; freshwater ; length 

 1-140". 



Two doubtful species : one (Z. gutta) 

 colourless and without strise ; the other 

 (L. rugosa) containing gi'een matter, with 

 the body wrinkled. Claparede describes 

 two other species. 



BiBL. Ehrenb. Inf. 309; Duj. Inf. 468; 

 Clap, et Lach. hf. ; Kent, Inf. 51 7. 



LACTA'RIUS.— A genus' of Hymeno- 

 mycetous Fungi, distinguished from Agari- 

 cus by the inner substance of the gills 

 (trama) being vesicidar instead of filamen- 

 tous. Most of the species abound in milky 

 juice; and several of them are esculent. 

 Amongst the most approved is L. deliciusus, 

 remarkable for its bright orange-coloured 

 milk. Some acrid species, however, as L. 

 jnperitus, are largely consumed in Russia, 

 having first in general been preserved in 

 salt and vinegar. The milk is contained in 

 pecidiar vessels, similar to the laticiferous 

 vessels of Phanerogams. See Laticife- 

 rous Tissue. 



BiBL. Fr. Epia: 333; Berk. Outl. 203; 

 Cooke, Handb. 206; Corda, Jc, fasc. 4, 

 pi. 10. fig. 1.30. 



LACTATES. See the bases lactate of 

 lime (PL 11. fig. 19), lactate of zinc (fig. 

 20). 



LACTEALS. See Villi. 

 L.-EMAR'CtUS, Kroyer.— a genus of 

 Crustacea, of the order Siphonostoma, and 

 family Cecropidae. 



L. muricatus. Found upon the sun-fish 

 (Orfhagoriscus mo/a). Length of female 1"; 

 male much smaller. 



BiBL. Baird, Brit. Entovios. p. 293. 

 LAFO'EA, Lamx: — A genus of Lafoeidae, 

 of the suborder Thecaphora (or Hydroida 

 with true calycles). 



Char. Stem a simple creeping tubular 

 fibre, or erect and composed of many tubes 

 aggregated together, rooted bv a filiform 



■2g 2 



