DENDRITINA. 



[ 241 ] 



DERMANYSSUS. 



Wedl, Path. Hist. 803; R. Beck, Ac/ir. 

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

 265. 



DENDRITI'NA, D'Orb.— The nautiloid, 

 or compactly discoidal, conditiou of Pene- 

 ropUs. Common in tropical seas, 



BiBL. Carpenter, Introd. For. 88. 



DENDROCOME'TES, Stein.— A doubt- 

 ful genus of Acinetiua. The single species, 

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

 by Stein to constitute the resting stage or 

 Acineta form of Spirochona yeminipara. It 

 is found upon the gill-plates of Gammai-us 

 pulex. 



BiBL. Stein, Siebold Sf Kdlliher''s Zeitschr. 

 1852, iii. 492 ; id. Infm. 205 ; Kent, Inf. 



DENDRO'MONAS, Stein.— A genus of 

 Flagellate Infusoria. 



Char. Bodies pyriform, obliquely trmi- 

 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). 



DEXDROSO'MA, Ehr.— A genus of 

 Ehizopoda, of the family Acinetina. 



Char. Consists of a thicli branched pedicle, 

 fixed at its base, the branches supporting at 

 their ends numerous bodies, a little larger 

 than the pedicles, each resembhng an Ac- 

 tinophrys. 



D. radians. Bodies conical, thick, soft 

 and smooth, alternately branched; branches 

 iucrassate and tentaculate at the ends. Size 

 1-96' '. Freshwater. 



BiBL. Ehrenberg, Infus. 316; CI. & 

 Lachni. Inf. iii. 140 (fig.). 



DENDRYPHIUM, Walb.— A genus of 

 Dematiei (Hyphomycetous 

 Fungi), consisting of moidds 

 gi'owing over dead herba- 

 ceous plants, nearly related 

 to Dactyliuni ; 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- 

 tylium (fig, 165) are brought 

 under this genus by Fries. 

 British species : 



D. curtttm, Berk, and 

 Br, On dead stems. Ann. 

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



D. Iaxii7n, Berk, and 

 Br. On dead stems. L. c. 

 fig. 10. 



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

 L. c. fig. 11. 



Dendryiihiiuu fu- 



mosum. 

 JMagn. 200 cliams. 



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

 pi. 6 ; Fries, Siimrna Veqet. 504. 



DENTALI'NA, D'Oibigny.— The bent, 

 oblique, and somewhat excentric varieties 

 of Kodosaria pass under this name for con- 

 venience rather than for zoological reasons. 

 Innumerable modifications of these curved 

 and tapering stichostegian Foramijiifera oc- 

 cui' 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, Pec. For. 17 ; Morris, Brit. 

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

 Parker, and Bradv, Moiioy, Foram. Crag, 

 Pal. Soc. 1866, 53,"' &c, 



DENTALINOP'SIS, Reuss.— A sticho- 

 stegian Nodosarina, commencing in its 

 gi'owth as a Phabdoyoniuni (OrthocerincC), 

 and continuing as a Dentalina. Only fossil ; 

 Cretaceous, 



BiBL, Reuss, Sitz. Ak. Wien, xHv, 367. 



DENTICEL'LA, Ehr. See Biddulphia. 



DENTIC'ULA, Kutz,— A genus of Dia- 

 tomacese. 



Char. Frustides free, single or binate, 

 straight, oblong or linear in front view ; 

 valves elliptical or narrowed at the ends, 

 transversely striated. Freshwater. 



Striae mostly coarse, not resolvable into 

 dots (costse) ; valves -^dthout a median fine 

 or nodules ; ends of the strife \nsible at the 

 margins of the front view of the fioistules ; 

 no internal septa. 



Five British species. Seven Em'opean 

 species ; one fossil (California). 



D. ohttisa (PL 16. fig. 25 : d, front view ; 

 c, valve). Valves lanceolate, attenuate and 

 obtuse at the end ; length 1-830". 



The other species differ principally iu 

 size ; D. sinuata is undulate in side view. 



BiBL. Kiitzing, 6'/;, Aly. 11 ; Smith, Br. 

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



DEPA'RIA, Hook.— A genus of Dick- 

 soniseous Ferns, with stalked indusia, shaped 

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

 Five very rare tropical species. 



BiBL, Hooker, Syn. 56, 



DEPA'ZEA, Fries, See Spimieia, 



DEPOSITS, URINAR Y. See Urine. 



DERMALEPCHUS, Koch = ANALGES 

 (Muii-av, Fcrnt. E7it. 327). 



DERMANYS'SUS, Duges,— A genus of 

 Arachnida, of the order Acarina, and family 

 Gamasea. 



Char. Body mostly soft ; palpi, the fifth 



