EUTERPE. 



[ 308 ] 



EXPECTORATION. 



Char. Subquadrangular (in side view) ; 

 abdomen very broad, flattened, densely ser- 

 rated ; beak blunt, slightly curved down- 

 wards. Freshwater. 



E. lamelhdus (PI. 20. fig. 39). Shell olive, 

 ciliated on the anterior ventricose margin, 

 arched behind ; beak rather blunt and short; 

 superior antennae terminating in six short 

 spines, each with a line seta or bristle ; an- 

 terior branch of inferior antennte wdth five 

 long filaments — one from the end of the first 

 and second joints, three from the third, as 

 also a small spine ; posterior branch with 

 three long filaments at the end of the last 

 joint, the first and second each with a short 

 spine only. 



It generally lives at the bottom of the 

 vessel in which it is kept. 



BiBL. Eaird, Brif.. Entom. p. 123. 



EUTER'PE, Glaus.— A genus of Cope- 

 poda. 



1 species: Ireland. (Brady, Coiwpoda, 

 Bay Soc. ii. 22.) 



EUTREP'TIA, Perty.— A genus of Fla- 

 gellate Infusoria. 



Char. Free, ovate, or pyriform, green; 

 swimming or creeping ; flagella two, equal ; 

 an anterior red eye-spot. 



E. viridis. Length o^o"- Pond- water. 



BiBL. Perty, Kl. Lebensf. 1G8 ; Kent, 

 Inf. 410. 



EVADNE, Loven. — A genus of Eutom- 

 ostraca, of the order Cladocera, and family 

 Polypheniid^te. 



Char. Abdomen short, scarcely projecting 

 from the shell ; head not distinct from the 

 body ; marine. 



E. Nordmanni (PI. 19. fig. SO). Colom-- 

 less, excepting the eye. 



Forms part of the food of the herring. 



BiBL. Lov(5n, Wiec/manns Archiv. 1838, 

 Bd. i. 143; M.-Edwards, Crust, iii. 390; 

 Baird, Brit. Entom. 114. 



EVER'NIA, Ach. — A genus of Lichena- 

 ceous Lichens, tribe Ramalinei; cosmopo- 

 litan in its range; recognized by its fiat- 

 tened, flaccid, laciuiate, white or grey thal- 

 lus, lateral apothecia, and simple spores. 

 Two species: E.furfaracea {E. But. pi. 984) 

 and E. prunastri (E. But. pis. 8o9 «& 1353) 

 occur in Great Britain. 



BiBL. Nylander, Si/n. 283 ; Leightou, 

 Lich. Fl. G. B. 81. 



EXCIP'ULA, Fr.— A genus of Spha-ro- 

 nemei (Stylosporous Fungi), forming horny 

 tubercles on dead stems and leaves, finally 

 o]iening by an entire orbicular apeiture. 

 The stylosporcs are elongated, lauceolate or 



fusifomi; and long hair-like processes are 

 sometimes mixed with the sporophores 

 which line the disk. Fom* British species 

 are recorded : E. fusispora and E. strujosa 

 of Fries, and E. macrosticha and E. chceto- 

 stroma of Berk, and Br. Perhaps related 

 to some Ascomycetous form, (See Gonio- 



MYCETES.) 



BiBL. Berk, in Hook. Br. Fl. ii. pt. 2, 

 296 ; Berk, and Broome, Ann. N. H. 1850, 

 V. 450. pi. 11. fig. 2. 



EXIB'IA, Fr.— A genus of Tremellini 

 (Hymenomycetous Fungi), forming gelati- 

 nous, truncated black or coloured bodies on 

 the trunks and branches of trees. Gommon 

 in autumn and winter. Tulasne has lately 

 published some interesting observations on 

 the structure of the hymenium which 

 clothes the upper face. This is composed 

 of a densish layer of very slender filaments, 

 which bear at their free surface globular 

 cells (basidia) divided vertically into two or 

 four chambers ; fiom each of these arises a 

 slender process (sterif/nia), at the end of 

 which is developed a stylospore. In E. spicu- 

 losa, spermatia were also observed in young 

 specimens, at the ends of very slender fila- 

 ments passing through the mucilaginous 

 layer overlying the layer of basidia. (See 

 Backymyces, Hkeneola, and other genera 

 of Tremellini.) 



BiBL. Berk, in Hook. Br. Fl. ii. pt. 2. 

 217 ; Tulasne, Ann. Sc. Nat. 3 ser. xix. 202, 

 pis. 11 & 12. 



EXOAS'GUS. See Ascomyces. 



EXOBASIDIUM, Wor. — The lowest 

 form of Hymenoniycetes. E. Vaccinii is 

 common on Ixhodvdendron and Vaccinivm, 

 causing fleshy swellings on the leaves. It 

 is Ascomyces carnosa, Berk. 



BiBL. Be Barv and Woronin, Ber. Nat. 

 Gesell. Freiburf/,\x. 397 ; Sachs, Bat. 336. 



EXOCOG 'G'US,Nageli.— Probably a P/v- 

 tococcus or PalmeUa. 



BiBL. Niigeli, Netc, Alyensyst. p. 169. 



EX'OGEN. See Dicotyledons. 



EXOS'MOSE. See Enbosmose. 



EXPEGTORATION.— The various ob- 

 jects which may be fomid in the expectora- 

 tion are noticed under their respective heads, 

 ■jr those of the tissues from which they are 

 derived ; a list only need be given here. 



Mucous corpuscles ; epithelial cells, of the 

 pavement, cylinder, or ciliated forms ; exu- 

 dation globules, or granule-cells ; pus and 

 pyoid corpuscles ; coloured corpuscles of the 

 blood ; pseudo-membranous flakes of fibrine ; 

 tubercle ; fatty matter in the form of glo- 



