DIMORPHOCOCCCJS. 



[ 264 ] 



DINOPHYSIS. 



Fig. 178. 



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

 phous Polymorphina. Fossil and recent. 



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

 3. xvi. 28 ; D'Orb. For. Foss. Vien. 221. 



DIMORPHOCOCCUS, Braun. A ge- 

 nus of Palmellaceous Algae ; consisting of 

 free botryoidal substipitate groups of ovate 

 or lunate green cells, 4 in each. 



D. lunatus (PI. 61. fig. 43). In pools ; 

 Germany. 



BIBL. Braun, Alg. Unicell. 44. 



DINEMASPO'RIUM, Le>. A genus of 

 Sphaeronemei (Stylosporous Fungi), con- 

 sisting of minute plants forming spots upon 

 the leaves of grasses. D. gramineum, Lev., 

 the only British species, = 

 Excipida graminis, Berk. Br. 

 Fungi, No. 328, and Exc. 

 gram., Corda. It has a scat- 

 tered conceptacle, closed at 

 first, and subsequently widely 

 opened, forming a disk covered 

 with white spores of a peculiar 

 form, abruptly produced into 

 filaments at each end (fig. 

 178). 



BIBL. Berk, and Broome, 

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

 Le>eille, Ann. Sc. Nat. 3 ser. 



V.274; Corda, Icon. Fung.lU. Dinemasporium 

 pi. 6. fiff. 79 gramineum. 



DINEMOU'RA, Latr.-A **S*^' 

 genus of Crustacea, belonging 

 to the order Siphonostoma and family Pan- 

 daridae. 



Char. Lamellar elytriform appendages 

 covering the thorax, only one pair. First 

 three pairs of legs setiferous ; the posterior 

 foliaceous and membranous. 



D. alata and D. Lamnne have both been 

 found upon the Beaumaris Shark (Lanma 

 monensis). 



BIBL. Baird, Brit. Entomostr. 282. 



DINENY.MTHA, Leidy. A genus of 

 Holotrichous Infusoria. 



Free, elongate, flexible, ciliated all 

 over. 



D. gracilis, in the intestines of white ants. 

 (Kent, Inf. 555.) 



DINOBRYI'NA, Ehr. A family of 

 Flagellate Infusoria. 



Char. Bodies variable in form, with two 

 flagella, one short, one long ; contained in 

 urceolate capsules, which are either single, 

 or aggregated into a branched zoary 

 from the new capsules remaining adherent 

 by their bases to the summits or the bases 

 of the preceding : the result of multiplica- 



tion by gemmation ; freshwater. (Astasiaea 

 with a carapace.) 



Two genera, Dinobryon and Epipyxis. 



In Dinobryon 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 

 constantly. 



BIBL. Ehr. Inf. 122; Duj. Inf. 320. 



DINOB'RYON, Ehr.-A genus of In- 

 fusoria, of the family Dinobryiua. 



Char. Carapaces urceolate, united in the 

 form of a branched polypidom. 



D. sertularia, E. (PI. 30. tig. 41X 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 j 

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

 pace 1-1420". 



BIBL. Ehr. In/us. 124, and Berl. Ber. 

 1840, 199 ; Duj. Inf. 321; Archer, Qu. Mic. 

 Jn. 1866, 123 ; Kent, Inf. 409. 



DINO'CHARIS, Ehr. A genus of Ro- 

 tatoria, of the family Euchlamdota. 



Char. A single cervical eye; foot forked; 

 carapace closed beneath, and without teeth 

 at the ends. 



Jaws with one (or two?) teeth each. 

 Aquatic. Two horns at the base of the foot. 



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

 Carapace acutely triangular, two horns at the 

 base of the foot, and two toes; length 1-120". 



Two other species. 



BIBL. Ehr. Infus. 471. 



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

 gellate Infusoria, of the family Peridinaea ; 

 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 

 Pendinium. The transverse furrow is close 

 to the truncated anterior end ; and from this 

 furrow there extends down the body a folded 

 crest or fringe, like that of Sientor, except 

 that it is a part of the carapace. A crown of 



