514 MESSES. T. E. JONES AND F. CHAPMAN ON THE 



50. I'olymorpMna aihla, Goes, 1894, Kgl. Yet.-Akad. Handl. 

 vol. xxv. no. 9, p. 55, pi. ix. fig. 522. Zool. type : P. gibla, 

 d'Orb. Eecent ; Coast o£ Norway.— Pig. 32. 



51. Misilus a^uatifer, Montfort, 1808, Conch. Syst. vol. i. p. 294, 

 74" genre. See Ann. Mag. Nat. Hist. ser. 3, vol. vi. 1860, 

 p. 345. Zool. type: P. lactea {y^. & Z.). Eecent; Medi- 

 terranean. 



52. ' PoJyniorplia corcula spinosa,' etc., Soldani, 1791, Testaceo- 

 graphia, rol. i. part 2, p. 114, pi. 109. figs. &, M, L j pi. 110. 

 figs. N, s ; pi. 111. figs. X, « a, c c, d d. Zool. type : P. gibla, 

 d'Orb. Eecent; Mediterranean. 



53. Folymorphina gibla (fislulose form), Wright, 1886, Proceed. 

 Belfast. Nat. P. Club, 1884-85, Appendix, 1886, p. 324, 

 pi. xxvi. fig. 11. Zool. type : P. gibla, d'Orb. Eecent ; 

 Belfast Lougb.— Eig. 33. 



54. PolymorpTiina concava, Williamson, 1858, Eecent. Poram. 



Gt. Britain, p. 72, pi. vi. figs. 151, 152 ; refigured by Brady, 

 Parker, & Jones, 1870, Trans. Linn. Soc. vol. xxvii. p. 236, 

 pl.xl. figs. 32, a, &. Zool. type : P. Zac^ea(W. & J.). Eecent; 

 Britisb coast. — Fig. 34. 



55. PolymorpMna concava, E. Jones, Monogr. Crag Poram. 

 Part II. 1895, pi. v. fig. 22 (Millett's Collection). Zool. 

 type : P. lactea (W. & J.). Pliocene ; Suff"olk. 



56. l?olymor'phina concava, var. dentimarginata. Chapman, 1894, 



Quart. Journ. G-eol. Soc. vol. 1. p. 717, pi. xxxiv. figs. 14 a, I. 

 Zool. type : P. lactea (W. & J.). Lower Greensand; 

 Surrey. — Outgrowth a shelly capsule surrounding the initial 

 test, lengthened and acuminate at the oi'al and aboral extre- 

 mities, the edge finely acerate. The whole of the capsule is 

 septate, divided into about five chambers. The surface of 

 attachment, together with the initial test, is perfectly flat 

 and smooth. — Pigs. 35 a, h. 



57. Folymorphina Orbignii (striate-fistulose specimen), Brady, 



Parker, and Jones, 1870, Trans. Linn. Soc, vol. xxvii. p. 244, 

 pi. xlii. fig. 38 m. Zool. type : P. regina, B., P., & J. Plio- 

 cene ; Sufi"olk.— Pig. 36. 



58. FolymorpJiina compressa (fistulose form), Brady, 1884, Chall, 



Eeports, vol. ix. p. 566, pi. Ixxiii. fig. 17. Zool. type: 

 P. compressa, d'Orb. Eecent. — Pig. 37. 



