CYSTOTRICHA, 



[ 233 ] 



CYTHERURA. 



CYSTOT'RICIIA, Berk, and Jiioome — 

 A supposed genus of Sphasroneniei (Couio- 

 mycetous Fungi). Minute fungi forming 

 dots or lines upon wood from which the 

 baric has been stripped. Only one species 

 is described. 



C.striohl,^^evk. and Br. Perithecia black, 

 with a reddish tiuo-e, opening by a reddish 

 disk. 



BiBL. Berk, and Br. Ann. N. H. 1850, v. 

 467, pi. 1-2. tig. 10. 



CYTII'ERE, Miill.— A genus of Euto- 

 mostraca, of the order Ostracoda,aud family 

 Oytheridpe. 



Char. Shell usually hard, calcareous, 

 rough and uneven ; mouth with a lip and 

 labr urn ; masticatory organs well developed ; 

 maudibles toothed at the end ; lower an- 

 temi{B four-jointed; upper antennae five- 

 jointed, last three joints elongated, spini- 

 ferous ; feet in the male and female alike ; 

 internal lobe of the first pair of maxillae 

 weU developed. Not capable of swim- 

 ming. 



Those having the valves almost regidarly 

 oblong, with the surface very irregular ,being 

 wrinkled, ridged, and beset with tubercles, 

 and crenulate or strongly toothed on the 

 margin, have been separated by Rupert 

 Jones imder Cythereis. 



46 living British species. Many fossil 

 Cytherae are recorded, which, however, 

 most probably belong to allied genera, un- 

 distinguishable by the valves alone. Brady 

 records 22 species as occurring in post-ter- 

 tiary deposits of Britain. 



BiBL. Baird, Brit. JEnfom. 163 ; Brady, 

 Linn. I'r. xxvi. 394, and Ann. N. H. ser. 4. 

 ix. 68 ; Zool. Tr. v. 376. 



CYTHERE'IS, Rup. Jones. See Cy- 



THERE. 



C YTHEREL'LA, R. Jones and Bosquet. 

 — A genus of Ostracode Entomostraca, fa- 

 mily Cytherellidse. 



Char. Valves unequal, very thick and 

 calcareous, not notched in front. Upper 

 antennse very large, seven-jointed, and geni- 

 culate at the base ; lower broad, flattened, 

 and two-branched; mandibles very small, 

 witb a large pectinate-setose palp ; three 

 pairs of hinder limbs, scarcely pediform, the 

 two anterior pairs branchial, the others 

 rudimentary. Abdomen terminating in two 

 vei-y small, uaiTow, spiniferous lamintc. 

 Ova and embryos borne beneath the shell 

 of the female. 



2 living British species, C. scofica and C. 

 Icevis; from deep dredging in tho Minch. 



Numerous fossil species, from the Carboni- 

 ferous to Tertiary strata inclusive. 



BiBL. Brady, Linn. Tr. xxvi. 472 ; Zool, 

 Tr. V. 362 ; R. Jones, Mon. Cret. EnUmi. 

 1849, 28 ; Mo7i. Tert. Lntom., Palceont. Soc. 

 1856, 54. 



C YTIIERELLI'N A, Jones.— An obscure 

 fossil Ostracod, very common in the upper 

 Silurian strata of Britain and Europe. 



BiBL. R. Jones, Aim. N. IT. ser. 4. iii. 

 215. 



CYTHERID'EA, Bosquet.— A genus of 

 Ostracode Entomostraca, family Cytheridse. 



Char. Shell subtriangular, thick and com- 

 pact, smooth, pitted, papillose or rugose. 

 Mouth with a lip and labrum ; masticatory 

 organs well developed ; mandibles toothed 

 at apex; lower antennae four-jointed ; upper 

 five-jointed, last three joints elongated, 

 spiniferous ; feet in male and female unlike ; 

 right foot of first pair in the male prehen- 

 sile, right of the second pair weak and 

 rudimentary. 



10 living British species. Several fossil 

 Cretaceous and Tertiary species. 



BiBL. Brady, Linn. Tr. xxvi, 421 ; Zool. 

 Tr. V. 370 ; R. Jones, Mon. Tert. Entom., 

 Pal. Soc. 1856, 40, and Geol. Mag. vii. 76, 

 158. 



CYTHERIDETS, Jones.— A subgenus 

 of Ostracode Entomostraca. 



1 living British species, C. subulata ; 

 some fossil reputed species, Cretaceous and 

 Tertiary. 



BiBL. Jones, Monogr. Tert. Entom., Pa- 

 IcEontog. Soc. 1856, 46 (shell) ; Brady, A7in. 

 N. IL 1872, ix. 58 (animal). 



CYTHEROPSIS, Sars = Eucythere, 

 Bradv. 



CYTHEROP'TERON, Sars.— A genus 

 of Ostracode Entomostraca, 



Char. Valves of shell unequal, with pro- 

 minent lateral alee. JNlouth with labium 

 and labrum ; masticatory organs well deve- 

 loped ; maudibles toothed ; lower antennae 

 five-jointed; upper five-jointed; postabdo- 

 miual lobes broad and short, with three 

 setae ; eyes none. 



9 living British species. Also some Cre- 

 taceous and Tertiary species. 



BiBL. Brady, Linn. I'rans. xxvi. 447, 

 and Ann. N. II. ,1872, ix. 61 ; R. Jones, 

 Geol. Maq. vii, 76 and 158, 



C YTIIERU'RA, Sars,— A genus of Os- 

 tracode Entomostraca, 



Char. Shell oblong or subtriangular, pos- 

 terior extremity prolonged into a beak. Su- 

 perior antennae six-jointed, shortly setose, 



