— 571 — 



Thecosoma (male Thecosomata) Blainv. 1824. Dict. sc. 

 nat. toin. 32. p. 271. et 1825. Mal. p. 480. Conf. 

 Desh. Enc. melh. 111. p. 1036. 

 Eiym. S^rjxt] , theca; o(o(.ia, corpus. 

 Prima fam. Aporobranchiorum. Genera : Hyalea, 



Cleodora, Cymbulia, Pyrgo. 

 Gray 1842. Syn. Brit. Mus. p. 86. 92. — primus 

 ordo Pteropodum. Familiae: Cleodoridae, Lima- 

 cinidae, Cuvieridae, Cymbuliadae. 

 Synon. Hyaleacea Menke. 

 'riieeosoinata Blainv. Grav. vid. praec. 

 Tlieeotliera (bene!) Agass. 1847. Nom. zool. hid. univ. 



vid. Thecathera. 

 Tlielicomis Svvains. 1840. Malac. p. 312. 



Etym. &i]h'], mamma; xcjpog^ conus. Hinc Thelo- 

 conu.s. (Minus recte d^t^Xvxogy femineus, et corr. 

 Thely cus Agass.) 

 Subgenus Coni. Typus: Conus nussatella L. 

 = Hermes Montf. 

 Titelitlerma Swaixs. !840. Mal. p. 267. 378. 



Etym. ^r]lr], mamma; dsQi-ia y cutis. Hinc Thelo- 

 derma. (Nec d^ijXvg, tener, et Thelyderma 

 Agass.) 

 Subgenus Unionis. Typus: Unio metaneurus Rafin. 

 = Obliquaria Rafin. (subg. Quadrula.) 

 Thelitlomiis Swains. 1840. Malac. p. 227. 353. 



Etym. d-t]k)], mamma; 66f.iog, domus. Hinc Thelo- 

 domus. (Nec d-rjXvg, lener, et inde orl. corr. The- 

 lydomus Agass.) 

 Genus Lxotellinarum fictitium, sine dubio ad Mala- 

 cozoa non spectans, sic bene monente Gray 1840.. 

 Jun. Ann. of Nat. Hist. p. 257., cf. Sow. jun. 

 Conch. Man. ed. 2a p. 274. 

 Thelitlomu»ii Swains. 1840. Malac. p. 194. 330. err. typ. 



pro Thelidonta. 

 TheUtlonta .Swains. 1810. xMalac. 194. 418. (et Theli- 

 domus err. typ. p. 194. 330.) 



