CORDYCEPS. 



[ 209 ] 



CORINNA. 



found adhering to its surfece, and contains 

 aLundance of spicula (PL 41. lig. 7). 



The furrows seen upon the outer surface 

 of unprepai-ed coi-al, 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 ti-ansverse section (PI. 41. hg. 8 a) ex- 

 hibits somewhat uudetined hnes, some of 

 which are semicoucentric with the marginal 

 furrows, and appear to be lines of growth ; 

 these are intersected by darker and narrower 

 lines, apparently cauals. The orifices of 

 larger canals are also visible. The longitu- 

 dinal section (PI. 41. tig. 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 

 appeai-ance ; 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, 18-53, Zoo- 

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

 1864 ; Dana, Corals, 1872 ; Nicholson & 

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

 Milne-Edwards & Haime, Monoy. fossil 

 (Pal. Soc.) ; Duncan, ibid. 



COR'DYCEPS, Fries. See Sph^ria 

 and Claviceps. 



CORD YLO'PHORA , Allman.— A genus 

 of Zoophytes, order Hydroida, and family 

 Clavidas. 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 teutacula. 



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

 inches. The only compound Polype found 

 in fresh water. 



BiBL. Allman, ^ww. iV. ^.xiii. 330; and 

 P/iil. Tr. 1853 ; Johnston, Br. Zoophi/fes, 

 44 ; Hincks, Zooph. 15 ; Schnitzels Arckiv, 

 1871. 



CORE'IMIUM, 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 gi-een ; 

 not uncommon on decaying fruits, &c.= 



Floccaria glauca, Grev. 8c. Crypt. Fl. t. 301, 

 and is Penicilliuin crastaceiuii ^, 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, Si/st. Mycol. iii. 408 ; Greville, loc. cit. ; 

 Corda,, IconesFimy.ii. pi. 11. tig. 73; Pracht- 

 flora, pi. 25. 



CORE'THRA, Meig.— A genus of Dip- 

 terous Insects, of the family Tipulidae. 



The larva of C. jyJumicvrnis forms a beau- 

 tiful microscopic obj ect ; it inhabits fresh 

 water. 



BiBL. Karsch, Monoy. d. Coreth. plum. ; 

 Ray Laukester, Pop. Sc. Bev. 1865; Ley- 

 dig, Sieb. 4' B^oll. Zeitsch. iii. 435 ; Rymer 

 Jones, Mic. Tr. 1860. 99 ; Weismaun, 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. sej'tularice. On Scrtidaria pumila^ 



BiBL. Piitchard. Infus. p. 563. 



CORIN'NA, Heib.^A genus of Diato- 

 macete. 



Char. Frustides punctate-areolate, united 

 into semicircrdar fascife, angles produced, 

 spiniferous, the uppermost longest, inter- 

 mediate portion hemispherical, with septa ; 

 valves ellipsoidal, transversely bicostate, 

 apiculate at each end. 



