1 05 



S F 1 R I y ^ 1^ ambigtius- 

 TAB. CCCLXXVI. 

 Spec Char. Subpentangular, gibbose,^ smooth, 

 with the middle elevated towards tne tront , 

 beak produced, perforated ; hinge Ime very 

 short. 

 The produced beak and three-sided front give this shell 

 .ffive^an-led contour, although the sides are rounded. 

 In 'ene?al appearance it does not agree with mostof the 

 sicifs of tLe Genus Spirifer, but approaches nearer o 

 te smooth Terebratula?; its having a perorated beaU, 

 tdlTttteor no hinge line, still further chstu.guish it; 

 but the actual existence of spiral appendages seems to 

 confirm ita Spirifer, unless its combining the characters 

 of both Genela shoild render it adviseable to construct, 

 a new Genus of it. But as the appendages withu. the 

 Terebratul^ are very variable, it will be well to wait un- 

 ♦ il more of them are known. 



Obtained fro.n decomposed Mountau, Limestone, 

 (R^ttrstone) found near B^kewell and K.nd^y pre 

 sputed to me some years ago, by Mi. White VVatson. 

 The heU is replaced by Silex, which has retained the 

 form ont, although the stone is completely aecomposed 

 and reduced to a brown powder; the spiral appendages 

 are extremely fragile. _^^^__ 



SPIRIFER minimus. ' 



TAB. CCCLXXYIL— Fig. 1. _ 

 Spec Char. Transversely oblong, gibbose 



with 15 longitudinal ridges, the three central 



ones elevated. 

 II vrHEE rhomboidal with rounded angles the ridges are 

 roimded, close together, and sn.ooth ; tlie thi^e elevated 

 ones are less distinct from each other than the others 

 the Ion- line of the hinge, the flat space, and triangulai 

 oramen between the pointed beaks are -^y c<3"^P-^^^^^^ 

 but the appendages characteristic ot the Genus tepinter, 



