LIMA. 51 



1000. Lima i>ecvssata., C. Gagel and F. Kaunhowen. Jalivb. d. k. preussisch. gcol. 



Landesanst. fiir 1891», p. 232. 

 1902. — — /. F. J. Itacn. Mollusk. i Danmarks Kridtafl. : I. Lam- 



ellibr. (K. Dauske Vid. Selsk. Skrift., 

 6 Eajkke, nat. og. math. Afd., vol. xi), 

 p. 9G, pi. ii, fig. 11. 

 — — — A. Wollemann. Fauna d. Liineburg. Kreidc (Abhandl. 



d. k. preussiscli. gcol. Laudesanst., 

 N. F., Heft 37), p. .57. 



Description. — Shell inflated, ovate oi* rounded-oblong, nearly equilateral. Um- 

 ])ones small. Bars rather small, nearly equal. 



Ornamentation consists of numerous sharp ribs, sej^arated by narrow grooves. 

 The ribs become less distinct on the anterior and posterior parts of the shell. 

 Numerous fine concentric ridges occur, and sometimes give rise to a tubercular 

 appearance on the sunamits of the larger ril^s. 



Measurements : 



(1) (2) (3) (4) (5) 



Length .10 9 7 7 6-5 mm. 



Height . 13-5 12 11 lO'o 9-5 „ 



(1, 2, 4, 5) A. quadratus zone, East Haruham. 



(3) Uintacrinus band, Devizes Road, Salisbury. 



Affinities. — L. semisnlcata, Nilsson,' is distinguished from L. decussuta by the 

 ribs being limited to the median part of the shell, and hj the relatively higher 

 valves. 



Peron thinks that L. prdinafa, d'Orljigny, may be only a variety of L.decussata. 

 It appears to differ from the latter in having the ribs more tubercular and usually 

 fewer in number. 



Ti/pe. — From the Senonian of Rinkerode, near Miinster. 



Distribution. — Uintacrinus band of Devizes Road, Salisbury. Zone of Actino- 

 caniiLc quadratus of East Ilarnham and Ashley Hill. Zone of IJeleuniilella mucronata 

 of Clarendon. 



Li.M.\ (LiM.\TLi,.\) wiNTONENSis, sp. nov. Plate VII, figs. 21 (/,//, 22 'f — d. 



Description. — Shell inflated, ovate, nearly equilateral, pointed dorsally. 

 Ornamentation consists of 15 or 10 strong, rounded ribs on the median part of 

 the valve only. The ril)s are separated l)y very narrow grooves, and bear many 



1 'Petrif. Suecaua' (1827), p. 2.5, pi. i.\, fig. 3; Hcunig, Kevis. LanicU. i Nilssou's ' Petrif . 

 Suecana' (1897). p. 28, i-l. ii, fig.s. II, 17. 



