78 CRISTATELLA MUCEDO. 



1824. Cristatella vagans. Goldfuss, Naturhistoriscli Atlas. (Figures copied from 



Roscl.) 

 1828. Akyonella, secundus evolutionis gradus. Raspail, Hist. Nat. de FAleyou. fluv., 



Mem. dc la Soc. d'Hist. Nat. de Paris, vol. iv, p. 129. 

 1830. Cristatella mucedo. Cuvier, Keg. An., 2d edit., vol. iii, p. 296. 

 1834. Cristatella mirabilis. Dalyell, Rep. Brit. Assoc., p. 604; and Edinb. Nevv 



Phil. Journ., vol. xviii, p. 414. 

 1834. Cristatella vagans. De Blainville, Man. d'Act., p. 489, pi. 85, fig. 7. (Figure 



copied from Rosel.) 

 1834. Cristatella vagans. De Blainville, Diet. Sc. Nat., art. Cristutelle, fig. 7. 



(Figure copied from Rosel.) 



1836. Cristatella vagans. Lamarck, An. sans Vert., 2d edit., vol. ii, p. 110. 



1837. Cristatella mucedo. Turpin, Ann. Sc. Nat., 2d series, tom. vii, p. 65, pi. 2, 3. 



(Original figures.) 



1837. Cristatella mucedo. Gervais, Ann. Sc. Nat., 2d series, tom. vii, p. 77, pi. 4. 



(Original figures.) 



1838. Cristatella mucedo. Jolmston, Brit. Zooph., 1st edit., p. 308, pi. 43. (Figures 



copied from Turpin.) 



1839. Cristatella mucedo. Gervais, Ann. rran9. et Etrang. d'Anat., tom. iii, p. 133. 



1840. Cristatella moisissure. Gervais, Diet. Sc. Nat. Suppl., art. Alcyonelle, Planches 



Supplementaires, Pol. fluviatiles. (Original figures.) 



1843. Cristatella mucedo. Thompson, Rep. Brit. Assoc, p. 285. 



1844. Cristatella mucedo. Allraau, Ann. of Nat. Hist., vol. xiii, p. 330. 



1846. Cristatella mucedo. Allman, Rep. Brit. Assoc, Trans, of Sect., p. 88. 



1847. Cristatella mucedo. Johnston, Brit. Zooph., 2d edit., p. 387, pi. 73. (Figures 



copied from Turpin.) 



1848. Cristatella mucedo. Van Beneden, Bryoz. Fluv. de Belg., p. 16 ; Mem. de 



I'Acad. Roy. de Belgique. 

 1848. Cristatella mirabilis. Dalyell, Rare and Remarkable Animals of Scotland, 

 vol. ii. (Original figures.) 



Iconoffraphif. — The original figures are those of Rosel, Turpin, Gervais in ' Ann. Sc. Nat.,' 

 Gervais in ' Diet. Sc. Nat.' Suppl., and Dalyell. 



Habitat. — In clear lakes and ponds, where it creeps slowly over the upper side of sub- 

 merged stones and the stems of aquatic plants, delighting in sunlight. 



Localities. — British: A raillpond near Little Baddow, Essex; Union Canal, Edin- 

 l)urgh ; a beautiful little subalpine lake near Glandore, County Cork ; Lakes of Killarney, 

 Grand Canal, Dublin ; a lake near Armagh, and several other Irish localities. G. J. A. — 

 Duddingston Loch, near Edinburgh ; Coklingham Loch, Berwick ; a garden pond at Binns 

 House, Linlithgowshire. Sir J. G. Dah/ell. 



Foreign: Lake of Lucerne; "Grand Etang," Fontainbleau. G. J. A. — Near Paris. 

 Gervais and Turpin. — Belgium. Van Beneden. — Germany. Rusel. 



The first perfectly developed specimen of Cristatella mucedo was described in 1834, by 

 Sir John Graham Dalyell, who discovered it near Edinburgh, and perceiving it to be so very 



