DIMORPHOCOCCCS. 



[ 264 ] 



DIXOPIIYSIS. 



Modele no. 60, is the type of this dimor- 

 phous Poh/inur])lnna. Fossil and recent. 



BiBL. Parker and Jones, Ann. N. H. ser. 

 3. xvi. 28; D'Orb. For. Foss. Vien. 2l>l. 



DIMORPIIOCOCCUS, Braun.— A ge- 

 nus of Palmellaceous Algse ; consisting of 

 free botryoidal substipitate groups of ovate 

 or lunate green cells, 4 in each. 



D. lunatus (PI. 51. fig. 43). In pools ; 

 Germany. 



BiBL. Braun, Ah/. Unicell. 44. 



DINEMASPO'RIUM, Lev.— A genus of 

 Sphoeronemei (Stylosporous Fungi), con- 

 sisting of minute plants forming spots upon 

 the leaves of grasses. F>. gramineum, Lev., 

 the only British species, = 

 Excijmla grammis, Berk. Br. 

 Fungi, No. 328, and Frc. 

 gram., Corda. It has a scat- 

 tered conceptacle, closed at 

 first, and subsequently widely 

 opened, forming a disk CO vered 

 with white spores of a peculiar 

 form, abruptly produced into 

 filaments at each end (%. 

 178). 



BiBL. Berk, and Broome, 

 Ann. N. H. 2 ser. v. 456 ; 

 Leveille, Ann. Sc. Nat. 3 ser. 



v. 274; (u OV^a,, Icon. Fung. \il. Dinemasporium 

 pi. 5. fig. 79. gramineum. 



DI^ EMOU 'RA, Latr.— A eoo diams^ 

 genus of Crustacea, belonging 

 to the order Siphouostoma and family Pan- 

 daridse. 



Char. Lamellar elytriform appendages 

 covering the thorax, only one pair. First 

 three pairs of legs setiferou's ; the posterior 

 foliaceous and membranous. 



D. alata and D. Lammc have both been 

 found upon the Beaumaris Shark {Lamna 

 mo7iensis). 



BiBL. Baird, JBrit. Entomostr. 282. 



DINENYMTHA, Leidy.— A genus of 

 Holotrichous Ir.fusoria. 



Free, elongate, flexible, ciliated all 

 over. 



D. gracilis, in the intestines of white ants. 

 (Kent, Inf. 555.) 



DINOBRYl'NA, Ehr.— A family of 

 Flagellate Infusoria. 



Char. Bodies variable in form, with Iwo 

 flagella, one short, one long ; contained in 

 urceolate capsules, which are either single, 

 or aggregated into a branched zoary 

 from the new capsules remaining adlierent 

 by their bases to the summits or the bases 

 of the preceding : the result of multiplica- 



tion by gemmation ; freshwater. (Astasiaea 

 with a carapace.) 



1\a'o genera, Dinohryon and Fpipg.vis. 



In Dinohryon an interior red eye-spot is 

 present, but not in Epipyxis. In the former 

 a flagelliform filament is present ; this is 

 sometimes met with in the latter, but not 

 con.-tantlv. 



BiBL. Ehr. In-f. 122; Duj. Inf. 320. 



DINOB'RYON, Ehr.— A genus of In- 

 fusoria, of the family Binobryina. 



Char. Carapaces urceolate, united in the 

 form of a branched polvpidom. 



D. serialaria, E. {n. 30. fig. 41). Cara- 

 paces sessile or subsessile, slightly constric- 

 ted near the somewhat expanded and ex- 

 cised end ; length of zoary 1-144 to 1-120", 

 of bodies 1-570". 



Hermann and Archer point out that the 

 bodies become encysted at the mouth of the 

 capsules, forming Chlamydomonas - like 

 organisms. 



Bodies yellow or green, with a red eye- 

 spot in front. 



D. sociale, E. Carapace conical, truncate. 



D. gracile, E. Carapace slightly con- 

 stricted in the middle. 



D. petiolatum, D. (PI. 30. fig. 42). Ca- 

 rapaces with long stalks, bodies green ; 

 length of the polvpidom 1-100", of a cara- 

 pace 1-1420". 



BiBL. Ehr. Infus. 124, and Beri. Ber. 

 1840, 109; Duj. Inf 321; Archer, Qu. Mic. 

 Jn. 186G, V23 ;' Kent, Inf. 409. 



DINO'CIIARIS, Ehr.— A genus of Ro- 

 tatoria, of the family Euchlanidota. 



Char. A single cervical eye; foot forked; 

 carapace closed beneath, and without teeth 

 at the ends. 



Jaws ^v^th one (or two.^) teeth each. 

 Aq uatic. Two horns at the base of the foot. 



D. tetractis (PL 43. fig. 23; fig. 24, teeth). 

 Carapace acutely triangular, two horns at the 

 base ofthe foot, and two toes; lengthl-120". 



Two other species. 



BiBL. Ehr. Infus. 471. 



DINO'PIIYSiS, Ehr. -A genus of Fla- 

 gellate Infusoria, of the family Peridina3a ; 

 marine. 



Char. Free, single; carapace membranous, 

 urceolate, with a transverse ciliated furrow, 

 and a median plicate crest ; no eye-spot. 



Form, that of Vaginicola; nature, that of 

 Peridmium. The transverse furrow is close 

 tu the truncated anterior end ; and from this 

 furrow there extends down thebody a folded 

 crest or fringe, like that of Sientor, except 

 that it is a part of the (jarnpace. A crown of 



