BRACHIOPODA. 
113 
Fig. 22. A. decollata. 
Fig. 23.' A. Neapolitana. 
hoop four-lobed. Argiope. 
1. Argiope decollata. 
B.M. 
Shell transversely semicircular, with a few, smooth, obtuse, 
radiating ribs, which correspond in each valve; colour pale 
brown ; margins thickened internally ; hinge-line straight, as 
vvdde 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 furnished interiorly 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. H hnes (figs. 21, 22). 
Anomia decollata, Chemnitz, Conch. C. viii. p. 96. t. 78. f. 705. 
Dillw. R. S. i. p. 292. 
Anomia detruncata, Gmelin, S. N. p. 3347. 
Terebratula, Lamk. E. M. t. 243. f. 10. 
Terebratula decollata, De^A. in Lamk. Hist. ed. 2. vii.p. 351. 
Sow. Thes. Conch, vii. p. 355. t. 71- f- 68, 69, 70. 
Terebratula detruncata, Blainv. D. S. N. liii. p. 141, 1828. 
Philippi, Moll. Sicil. i. p. 96. t. 6. f. 14 a-h. 
Megathiris detruncata, D’Orh. Ann. Sc. Nat. 1848. 
Terebratula aperta, Blainv. Diet. Sci. Nat. hii. 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, Deslong champs, Mem. Lin. Soc. Normand. 
vii. p. 1, 1839. 
Argiope decollata, Dav. Artn. Nat. Hist. 1852, p. 373. 
Hab. Mediterranean, on corals, 45-105 fathoms. 
Fossil. Pliocene. Calabria. 
Miocene. Gibraltar (James Smith, F.R.S.). 
