UKACIIIOI'ODA. W'A 



Fig. 22. A. decollata. Fig. 23. A. Neapolitanu. 



Loop four-lobed. Argiope. 



1. Akgiope decollata. 



B.M. 



Shell transversely semicirculsir, with a few, smooth, obtuse, 

 radiating ribs, which correspond in each valve; colour pale 

 brown ; margins thickened internally ; hinge-line straight, as 

 wide as the shell ; ventral valve deep, truncated by the wide and 

 flat hinge-area ; foramen a wide and deep notch, bordered by the 

 rudimentary deltidia ; dorsal valve furnislied interiorlv with three 

 or five radiating septa, and a four-lobed loop attached to the 

 septa, and sometimes blending with the shell in their inter- 

 spaces. Lon. 4, lat. 2^, alt. !» hues (figs. 21, 22). 



Anomia decollata, Chemnitz, Conch. C. viii. p. 96. t. 78. f. /OS- 



Dillw. R. S. i. p. 292. 

 Anomia detruncata, Gmelin, S. N. p. 3347- 

 Terebratula, Lamk. E. M. t. 243. f. 10. 

 Terebratula decollata, DesA. in Lamk. Hist. ed. 2. vii. p. 351. 



Soiv. rties. Conch, vii. p. 355. t. 71. f. 68, 6.9, 70. 

 Terebratula detruncata, Blainv. D. S. N. hii. p. 141, 1828. 



Philippic Moll. Sicil. i. p. 96. t. 6. f. 14 a-h. 

 Megathiris detruncata, D'Orb. Ann. Sc. Nat. 1848. 

 Terebratula aperta, Blainv. Diet. Sci. Nat. liii. 144, 1828. 

 Terebratula dimidiata, Scacchi, Oss. Zool. ii. p. 17. 

 Terebratula cardita, Risso, E. Merid. f. 180? 1826. 

 Terebratula urna antiqua, Risso, Eur. Mer. f. 177> 1826. 

 Terebratula squamata, (Eichw.) Bronn, Leth. 1837, p. 908. 



Eichwald, 1852, Leth. Ross. p. 54. t. 3. f. 12 (incorrectly 

 figured?). 

 Orthis detruncata, Philippi, Moll. Sicil. ii. p. 69, 70. 

 Argiope detruncata, Deslongchamps, Mem. Lin. Soc. Normand. 



vii. p. 1, 1839. 

 Argiope decollata, Dav. Ann. Nat. Hist. 1852, p. 373. 

 Hab. Mediterranean, on corals, 45-105 fathoms. 

 Fossil. Pliocene. Calabria. 



Miocene. Gibraltar (James Smith, F.R.S.). 



