— 573 — 



Tlierozoa Eichvv. contin. 



Tertius typus animalium , Heterozoorum quarta 

 classis. Ordines: Apoda (= Tunicata), Cirri- 

 peda, Brachiopoda, Acephala, Gasteropoda, Pte- 

 ropoda. 



= Ostracoderma Arist. 

 Tlterozoavia (Eiclnv.) Agass. Nom. Cf. praec. 

 Etym. d-r^Qaco, venor; ^ioaQiov, animal. 



Tlietlty» Cuv. olim. Goldf. Blainv. Pot. et Mich. vid. Te- 



thys Linn. 

 Thetis (Cuv. 1800?) Meckel. Oken. Wiegm. vid. Tethys. 

 Tltetis J. Sow. 1826. Min. Conch. tab. 513. 

 Etym. Ghig, filia Nerei. 

 Novum genus Veneri affine. 

 Defr. 1829. Dict. sc. nat. tom. 54. p. 274. 

 Bronn 1838. Leth. p. 704. 

 Sow.jun. 1839. Conch. Man. p. 106. et 1842. ed. 2a 



p. 274. 

 Gray 1842. Syn. Br. Mus. p. 91. — genus Lucini- 



darum. 

 MoRRis 1843. Brit. foss. p. 102. 

 Geinitz 1846. Grundr. d. Verst. p. 419. — genus 



Cytheridarum. 



Synon. Venus (sp.) Mantell. 



Thetis Adams 1845. Proc. Bost. Soc. Jan. p. 9. 

 Novum genus Astartae affine. 



Tlietys Fer. Desh. Philippi vid. Tethys. 

 Tliiara Bolt. Muhlf. vid. Tiara Bolt. 

 Tltiarella Swains. err. typ. vid. Tiarella. 

 Tltiatyra Sow. j u n. vid. T h y a s i r a. 

 Tbleolia Gray 1842. Syn. Brit. Mus. p. 56. 89. 

 Genus Turbinidarum. 

 ?= Tricolia Risso. 

 v«L 11. 36** 



