DENDRITINA. 



[ 241 ] 



DEEMANYSSUS. 



Wedl, Path. Hist. 803; R. Beck, Achr. 

 Micr. 6, pi. 24. fig. 1 ; Megnin, Parasites. 

 265. 



DEXDRITI'NA, D'Orb. The nautiloid, 

 or compactly discoidal, condition of Pene- 

 roplis. Common in tropical seas. 



BIBL. Carpenter, Introd. For. 88. 



DENDROCOME'TES, Stein. A doubt- 

 ful genus of Acinetina. The single species, 

 D. paradoxus (PI. 32. fig. 36), is supposed 

 by Stein to constitute the resting stage or 

 Acineta form of Spirochona gemmipara. It 

 is found upon the gill-plates of Gammarus 

 pulex. 



BIBL. Stein, Siebold # Kolliker^s Zeitschr. 

 1852, iii. 492 ; id. In/us. 205 ; Kent, Inf. 



DENDRO'MONAS, Stein. A genus of 

 Flagellate Infusoria. 



Char. Bodies pyriform, obliquely trun- 

 cate, single at the ends of a rigid homo- 

 geneous branched pedicle ; flagella two ; one 

 long, and the other short, lateral. Fresh- 

 water. 2 species. (Kent, Inf. 265). 



DENDROSO'MA, Ehr. A genus of 

 Rhizopoda, of the family Acinetina. 



Char. Consists of a thick branched pedicle, 

 fixed at its base, the branches supporting at 

 their ends numerous bodies, a little larger 

 than the pedicles, each resembling an Ac- 

 tinophrys. 



I), radians. Bodies conical, thick, soft 

 and smooth, alternately branched ; branches 

 incrassate and tentaculate at the ends. Size 

 1-96' '. Freshwater. 



BIBL. Ehrenberg, Infus. 316; 01. & 

 Lachm. Inf. iii. 140 (fig.). 



DENDRYPHIUM, Wallr. A genus of 

 Dematiei (Hynhomycetous 

 Fungi), consisting of moulds 

 growing over dead herba- 

 ceous plants, nearly related 

 to Dactylium ; but there are 

 often several spores chained 

 together at the tips of the 

 branches; perhaps not di- 

 stinct from Brachycladium, 

 Corda, whose species of Dac- 

 tyUwn(&g. 165) are brought 

 under this genus by Fries. 

 British species : 



D. curtum, Berk, and 

 Br. On dead stems. Ann. 

 N. H. 1851, vii.pl. 6. fig. 9. 



D. laxum, Berk, and 

 Br. On dead stems. L. c. 



fig. 10. Magn. 200 diams. 



D. griseum, Berk, and Br. On dead stems. 

 L. c. fig. 11. 



Fig. 165. 



BIBL. Berkeley and Broome, I. c. 176, 

 pi. 6 ; Fries, Summa Veget. 504. 



DENTALI'NA, D'Orbigny. The bent, 

 oblique, and somewhat excentric varieties 

 of Nodosaria pass under this name for con- 

 venience rather than for zoological reasons. 

 Innumerable modifications of these Curved 

 and tapering stichostegian Foraminif era oc- 

 cur in all formations from the Carbonifer- 

 ous to the Tertiary, and abound in existing 

 seas. D. communis, D'Orb. (PI. 23. f. 33) 

 is the type, and has persisted the longest of 

 any. 



BIBL. D'Orb. For. Foss. Vien. 1846; 

 Williamson, Rec. For. 17 ; Morris, Brit. 

 Foss. 34 ; Carpenter, Foram. 163 ; Jones, 

 Parker, and Brady, Monog. Foram. Crag, 

 Pal. Soc. 1866, 53, &c. 



DENTALINOP'SIS, Reuss. A sticho- 

 stegian Nodosarina, commencing in its 

 growth as a Rhabdogonium (Ch'thocerina), 

 and continuing as a Dentalina, Only fossil j 

 Cretaceous. 



BIBL. Reuss, Site. Ak. Wien, xliv. 367. 



DENTIOEL'LA, Ehr. See BIDDULPHIA. 



DENTIC'ULA, Kiitz. A genus of Dia- 

 tomacese. 



Char. Frustules free, single or binate, 

 straight, oblong or linear in front view ; 

 valves elliptical or narrowed at the ends, 

 transversely striated. Freshwater. 



Striee mostly coarse, not resolvable into 

 dots (costse) ; valves without a median line 

 or nodules ; ends of the strise visible at the 

 margins of the front view of the f rustules ; 

 no internal septa. 



Five British species. Seven European 

 species ; one fossil (California). 



D. obtusa (PI. 16. fig. 25 : d, front view ; 

 c, valve). Valves lanceolate, attenuate and 

 obtuse at the end ; length 1-330". 



The other species differ principally in 

 size ; D. sinuata is undulate in side view. 



BIBL. Kiitzing, Sp. Alg. 11 ; Smith, Br. 

 Diat. ii. 19 ; Rabenhorst, Fl. Alg. i. 114. 



DEPA'RIA, Hook. A genus of Dick- 

 soniaeous Ferns, with stalked indusia, shaped 

 like ancient flat goblets (fig. 166, p. 242). 

 Five very rare tropical species. 



BEBL. Hooker, Syn. 56. 



DEPA'ZEA, Fries. See SPH.EBIA. 



DEPOSITS, URINARY. See URINE. 



DERMALEI'CHUS, Koch=ANALGES 

 (Murray, JEcon. Ent. 327). 



DERMANYS'SUS, Duges. A genus of 

 Arachnida, of the order Acarina, and family 

 Gamasea. 



Char. Body mostly soft; palpi, the fifth 



B 



