CORDYCEPS. 



[ 209 ] 



CORINNA. 



found adhering to its surface, and contains 

 abundance of spicula (PI. 41. fig. 7). 



The furrows seen upon the outer surface 

 of unprepared coral, are the impressions of 

 vessels which traverse the cortical substance 

 and form a medium of communication be- 

 tween the various polypes. 



The structure of coral is rather obscure. 

 The transverse section (PI. 41. fig. 8 a) ex- 

 hibits somewhat undefined lines, some of 

 which are semiconcentric with the marginal 

 furrows, and appear to be lines of growth ; 

 these are intersected by darker and narrower 

 lines, apparently canals. The orifices of 

 larger canals are also visible. The longitu- 

 dinal section (PL 41. fig. 8 b) exhibits lon- 

 gitudinal lines, probably those of growth, 

 with an indistinct intermediate structure. 

 When treated with acid, the residue is soft 

 and easily folded so as to produce a lined 

 appearance ; and in parts the organic skele- 

 tons of spicula may be distinguished. Hence 

 it probably consists of spicula, aggregated 

 and ultimately consolidated, so that their 

 structure is no longer distinguishable. 



BIBL. Cuvier, Regne Animal, 1853, Zoo- 

 phytes ; Lacaze-Duthiers, Hist. Nat. Corail, 

 1864; Dana, Corals, 1872; Nicholson & 

 Etheridge, An. N. H. 1877, xx. 161, 388 >; 

 Milne-Edwards & Haime, Monog. fossil 

 (Pal. Soc.) ; Duncan, ibid. 



COR'DYOEPS, Fries. See SPHJERIA 

 and CLAVICEPS. 



CORDYLO'PHORA, Allman. A genus 

 of Zoophytes, order Hydroida, and family 

 Clavidae. * Freshwater. 



Char. Polypidom horny, branched, rooted 

 by a creeping tubular fibre ; branches tubu- 

 lar ; polypes existing at the extremities of 

 the branches, ovoid, the mouth at the distal 

 extremity, and furnished with scattered fili- 

 form tentacula. 



C. lacustris, the only species; height 2-3 

 inches. The only compound Polype found 

 in fresh water. 



BIBL. Allman, Ann. N. H. xiii. 330; and 

 Phil. Tr. 1853; Johnston, Br. Zoophytes, 

 44 ; Hincks, Zooph. 15 5 Schnitzels Archiv, 

 1871. 



CORE'MIUM, Link. A spurious genus 

 of Mucedines (Hyphomycetous Fungi), not 

 really distinct from PENICILLIUM ; but dif- 

 fering from the characteristic form of that 

 genus in having the erect fertile filaments 

 compacted into a kind of cellular pedicle to 

 bear the strings of spores (fig. 142). C. leu- 

 copus, Pers. ; filaments white, spores green ; 

 not uncommon on decaying fruits, &c.= 



Floccaria glauca, Grev. Sc. Crypt. Fl. i. 301, 

 and is Penicillium crustaceum /3, Fries. C. 

 candidum, Nees, filaments and spores white, 



Fig. 142. 



Coremium niveum, Corda. 

 Magnified 200 diameters. 



on decaying substances, is Penicillium can- 

 didum /3, Fries. 



BIBL. Hook. Brit. FL v. pt. 2. 344; 

 Fries, Syst. Mycol iii. 408 ; Greville, loc. cit. j 

 Corda, IconesFung.\\. pi. 11. fig. 73; Pracht- 

 flora, pi. 25. 



CORE'THRA, Meig. A genus of Dip- 

 terous Insects, of the, family Tipulidse. 



The larva of C. plumicornis forms a beau- 

 tiful microscopic object; it inhabits fresh 

 water. 



BIBL. Karsch, Monog. d. Coreth. plum. ; 

 Ray Lankester, Pop. Sc. Rev. 1865 ; Ley- 

 dig, Sieb. $ Kott. Zeitsch. iii. 435 ; Rymer 

 Jones, Mic. Tr. 1866. 99 ; Weismann, Sieb. 

 $ Koll. Zeitsch. 1866, 45. 



CORE'THRIA, Wright. A genus of 

 Rhizopoda, family Actinophryina (?). Body 

 oblong, with a long club-shaped appendage, 

 bearing a thick brush of 8-40 tentacles at 

 its summit. 



C. sertularia. On Sertularia pumila. 



BIBL. Pritchard, Infus. p. 563. 



CORWNA, Heib A genus of Diato- 

 maceae. 



Char. Frustules punctate-areolate, united 

 into semicircular fasciae, angles produced, 

 spiniferous, the uppermost longest, inter- 

 mediate portion hemispherical, with septa ; 

 valves ellipsoidal, transversely bicostate, 

 apiculate at each end. 



