NATURAL SCIENCES OF PHILADELPHIA. 193 



Orthis, sp. Phil. Hagen, Michellotti, nou Djilmim. 

 1. Megathyris decollata, Chemnitz. 



Anomia decollata, Chemn. Conch. Cab. viii. p. 9G, pi. 78, 

 fig. 705. 



Anomia detruncata, Gmelin, Syst. Nat. 



Terebraiula ungula, Retz, Nov. Gen. Test. 1788. 



Terebratida decollata, Deshayes, An. s. Yert. Ed. ii. vii. p. 

 350. 



Terehratula aperfa, Blainville, Diet. Sci. Xat. Also Hi- 

 dalgo, teste Jeffre3's. 



Terehratula pectiniformis, Costa, Fauna del Reg. Nap. 

 1852. 



Terehratula dimidiata, Scacchi. 



Terehratula cardita, Risso, Faun. Eur. Mer. 



Terehratula aura-antiqua, Risso, 1. c. 



Argiope decollata, Desl. 1. c. (t^'pe.) Dav. Rve. Conch. 

 Icon. pi. X. and most modern authors. 



IlegatJujris decollata, D'Orb. 1. c. (type.) Dall, Am. Journ. 

 Conch, vi. p. 145, figs. 22, 23, 1870; vii. p. 68, 1871. 



Atlantic coast of Spain, Ilediterranean. 



Subgenus Cistella, Gray. 



Cistella, Gray, B. M. Cat. p. 114. Jan. 1853. H. & A. Adams, 

 Gen. Rec. Moll. ii. p. 581. Dall, 1. c. vi. p. 145, vii. p. 68. 

 Bull. Mus. Comp. Zool. 1. c. p. 19. 

 Zellania, Moore, Proc. Somerset Arch. Nat. Hist. Soc. 1854. 

 Davidson, Mem. Soc. Lin. de Norm. p. 141. 1856 (type 

 Z. Davidsoni, Moore). Chera. Man. de Concliyl. ii. p. 210. 

 1. Cistella Barrettiana, Davidson. 



Argio2?e Barrettiana, Dav. P. Z. S. p. 108, pi. xii. fig. 3 a-c. 



Feb. 1866. 

 Argiope antillarum, Crosse & Fischer, Journ. de Conch3'l. 



p. 270, pi. viii. fig. 7. Mar. 1866. 

 Cistella Barrettiana, Dall, 1. c. vi. p. 146. 



Jamaica ; Guadaloupe. 

 \a. Cistella Barrettiana, var. lutea, Dall. 



G. Barrettiana, var. lutea, Dall, Bull. Mus. Comp. Zool. iii. 

 No. 1, p. 20, pi. i. fig. 5, 5a, pi. ii. figs. 4-8. May, 1871. 



Tortugas. 



