LD1NICYTIIERE. 



[ 471 ] 



LINGULINA. 



ceoli or sheaths single ; rotatory organ with 

 two lobes. Teeth forming a row in each jaw. 



L. ceratophylli (PI. 43. fig. 45). Urceolus 

 at first whitish, subsequently becoming 

 brown or blackish, smooth, or in conse- 

 quence of its viscidity covered with foreign 

 bodies. Freshwater ; length 1-24 to 1-18". 



BIBL. Ehr. In/us. 401. 



LIMNICYTHE'RE, Brady. An Ostra- 

 code, allied to Cythere, the antennae having 

 setge instead of spines, and the valves being 

 hin, and spinous or tubercled. 



BIBL. G. S. Brady, Linn. Tr. xxvi. 419. 



LIMNOCH'ARES, Latr. A genus of 

 Hydrachnea (Acarina), 



C. aquatica (Jiolosericea) (PI. 6. fig. 27), 

 the only species. It differs from other 

 water-spiders by its walking instead of 

 swimming. 



Body very soft and often spontaneously 

 variable in form; epidermis covered with 

 little conical granules (?) ; no hairs upon the 

 body, and but few upon the legs ; eyes at- 

 tached to a lanceolate scaly piece (d), and 

 surrounded by hairs; rostrum partly con- 

 cealed beneath the skin, the anterior ex- 

 serted half (b) cylindrical and accompanied 

 by the palps, the last joint of which is very 

 slender and obtuse ; by pressure the broader 

 base of the rostrum is made to protrude (/); 

 tarsi (c) thickened at the end, with Jarge 

 claws ; coxa3 of four posterior pairs of legs 

 longer than the others, which is contrary to 

 what occurs in Hydrachna, Atax, &c. ; coxae 

 of the two anterior pairs of legs closely 

 approximate, as are also those of the two 

 posterior pairs (e) ; but the two groups are 

 widely separated. 



Larvae with six legs, a large head-like 

 rostrum, with two large palps and two black 

 lateral anterior eyes, fixing themselves on 

 the head of Gerris lacustris ; they subse- 

 quently detach themselves, fall into the 

 water, and pass their nymph-stage under 

 submersed stones, the perfect animal making 

 its appearance at the end of fifteen days. 



BIBL. Duges, Ann. Sc. Nat. 2 eer. i. 

 159 ; Gervais, Walckenaer 's Arachn. 208 ; 

 Koch, Deuts. Crust etc. 



LIMNODIC'TYON, Kiitz. A genus of 

 Protococcacese. 



Char. Cells angular from mutual pres- 

 sure, forming membranous layers, in a 

 parenchymatous form; multiplication by 

 gonidia. 



L. Rocmerianum (PI. 52. fig. 14), in 

 pools. 



BIBL. Rabenh. Fl Alg. iii. 61. 



LIMNO'RIA, Leach. A genus of ma- 

 rine Crustacea, Order Jsopoda, and family 

 Asellota. 



L. terebrans (PL 36. fig. 27) is of interest 

 on account of the great ravages which it 

 commits in submerged timber, as the piles 

 of piers, flood-gates, docks, &c., which it 

 perforates in every direction. Head large, 

 rounded; antennas four, of nearly equal 

 length ; eyes two, lateral, black, composed 

 of about seven ocelli ; body elongato-sub- 

 cylindrical, thorax with seven joints, legs 

 seven pairs, formed for walking ; abdomen 

 six-jointed, the last joint large, suborbi- 

 cular, and with two styles ; length about 

 1-6". It contracts into a ball when dis- 

 turbed. 



BIBL. Leach, Linn. Tr. xi. 370 ; Cold- 

 stream, Edin. New Phil. Jn. 1834 ; Dalyell, 

 Wonders of Creation, i. 



L1NDIA, Duj. A genus of Rotatoria, of 

 the farnilv Hydatiusea, E. (Furcularina, 

 Duj.). 



Char. Body oblong, almost vermiform, 

 with 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 im- 

 perfectly described). 



L. tondosa (PI. 43. fig. 40). Freshwater ; 

 length 1-75". 



BIBL. Duj. In/us. 653; Cohn, Sieb. $ 

 Roll. Zeit. 1858, 286 ; Pritch. In/us. 



LINDS^EA, Dryander. A genus of 

 Lindsayese (Polypodiaceous Ferns). Exotic 

 (fig. 404). 



Lindsaea. 

 A pinnule. Magn. 10 diams. 



LINGULl'NA, D'Orb. A hyaline sti- 

 chostegian Foraminifer, differing from No- 



