DE. T. DAVIDSON ON EECEXT BEACHIOPODA, 141 



marginal elevated septum. Sliell-structure i:)unctate. Propoi-tions variable ; the largest 

 specimen measured — length 2.j lines, breadth 2 lines, depth If lines. 



Hab. This species Avas obtained at a depth of GO fathoms, off the north-east coast of 

 Jamaica, by Lucas Barrett. 



Ohs. I published this description in 1SG6, and have never seen any specimens besides 

 those obtained by Mr. Barrett. Cistella JFoodicurdiaiia is a stout little shell, and 

 differs from its congeners in shape as weU as in its smooth and spotted surface. 



80. Cistella cuneata, Eisso, sp. (Plate XXII. figs. 30-31.) 



Terebratiila ciineata, llisso, Hist. Nat. Europe meridionale, t. iv. p. 388, pi. 4. fig. 179, 1826. 



Terebratulu Solduniana, Eisso, Hist. Nat. Europe meridiouale, t. iv. p. 389, pi. 4. fig. 178, 182(5. 



Terebratula cuneata, de Blainville, Diet. Sci. Nat. t. liii. p. 143, 1828. 



Anomia Peru, ]\Iuhlfcld, A^erhandl. d. Gesellscli. naturforsch. Frcunde, Berlin, i. p. 205, 1829. 



Terebratula cinxuitii, Pliilippi, Enum. Moll. Sicilise, vol. i. p. 90, pi. vi. fig. l;5, 183G ; E. Forbes, 

 Eeport ou the ^lollusca of ^Egean Sea, Brit. Assoc. Report for 1843, p. 1G5. 



Terebratula pera, Kiister, Conch. -Cab. vol. vii. p. 30, pi. 2 b. figs. 14-17, 1843. 



Orthis Peru, Pliilippi, Euum. Moll. Siciliie, vol. ii. p. 69, 1844. 



Terebratula cuneata, G. B. Sowerby, Thes. Concli. i. p. 355, pi. Ixxi. figs. 83 & 84, 184G. 



Ortliis Pera, O. G. Costa, Fauna del regno di Napoli, p. 37, pi. iii. bis, fig. 1, 1851. 



Argiope cuneutu, Davidson, Ann. & Mag. Nat. Hist. 2ud ser. vol. ix. p. 373, 1852; and Proc. Zool. 

 Soc. 1852, pi. xiv. fig. 27 ; Woodward[& Gray, Catalogue of BracLiopoda in Brit. Mus. p. 114, 1853 ; E. 

 Suess, Ueber die Wolinsitze der Bracbiopoden, Sitzungsb. k. Akad. Wissenseh. Wien, p. 21 1, 1859. 



Terebratula [Argiope) cuneata, Lovell Eceve, Concb. Icon. pi. x. fig. 44, 1801 ; Ann. & Mag. Nat. 

 Hist. 3rd ser. vol. vii. p. 185, 1861. 



Terebratulu cuneata, Verany, Zool. des Alpes Maritimes, 1862. 



Arr/iope cuneata, H. C. Weinkauff, Die Coneb. des Mittelmccres, vol. i. p. 288, 1867. 



Aryiope Peru, S. Brusina, Moll. Dalmati, p. 47, 1800. 



Terebratula cuneata and T. Soldaniana, Davidson, Notes on some Recent Mediterranean Species, 

 Ann. & Mag. Nat. Hist. 4tb ser. vol. iii. p. 374, 1809. 



Orthis pera, Terquem, Coquilles de Corse, p. 99. 



Aryiope cuneata, Montcrosato, Cat. delle Coq. Mediterranea, 1875; G-nyn Jeffreys, Proc. Zool. 

 Soc. 1878, p. 410; Sdmlgin, Zeitschrift i'iir wissenseh. Zool. Bd. xli. p. 121, pi. viii. fig. 3, 1885; 

 A. E. Shipley, On the Structure and Development of Aryiope, Mittheilungen a. d. Zool. Station zu 

 Ncapcl, Bd. iv. p. 495, 1883. 



Shell very small, somewhat transversely semicircular, obtuse posteriorly, slightly 

 indented in front, rounded laterally, wider than long. Iliuge-line straight, about as long 

 as the greatest breadth of the shell; cardinal angles gently rounded. Dorsal valve semi- 

 circular and very gently convex. Ventral valve deeper and more convex than the dorsal 

 one ; beak tumidly produced, slightly incurved and truncated l)y a very large, broad, 

 incomplete foramen, thickened posteriorly, anteriorly margined by the umbo of the 

 dorsal valve, and laterally by small rudimentary deltidial plates ; beak-ridges sharply 

 defined, leaving betAveen them and the hinge-line a widish triangidar flattened space. 

 Surface of valves marked with from six to eight simple, rather flat, rounded radiating ribs, 

 with interspaces of nearly equal breadtli, three or four on each side of a rather wide 

 median groove ; ribs corresponding in both valves. Colour white, or bright yellow, tinted 



19* 



