VOL. xvI. (1) | BUCKMAN—GENUS C/NCTA 57 
19. CINCTA PAUPER, sf. z., Pl. VI, figs. 9, 10. 
Description .—Broadly pentagonal, stout, anterior mar- 
gin truncate and thickened ; posterior end broadly fastigate. 
Apical angle about 122. 
Distinction :—From C. obolus, broader apical angle, less 
gibbous valves; margin thickened at a size when that 
of C. obolus is plain. From C. tnops, broader, shorter, and 
thicker. 
Locality and Stratum /—Somerset, Radstock; Mr 
Tutcher’s and Mr Marshall’s collections. 
20. CINCTA MISERA, sf. z., Pl. V, figs. 5, 6. 
Description :—Elongate, thin, margins acute, front mar- 
gin narrow, just rounded. Apical angle about 90. 
Distinction :—This is like a dwarf C. paupercula. It is 
not a young of that form, because at the size that this 
is elongate that form is circular ; and this is the distinction 
between them. From C. zzops, narrower, and without the 
thickened margin. 
Remarks :—The specimens may not be adult: the 
species might have older specimens which developed a 
thickened or a bilobate margin, or both. But the elongate 
shape shews that this form is not the young of any other 
species described ; at this size they are all broader. 
Localities -—Somerset, Radstock; specimens in Mr 
Tutcher’s and Mr Marshall’s collections. 
B. Forms not depicted in the Plates 
a1. CINCTA CAUSONIANA (a’Orbigny) 
Tad. WOrbigny, Prod. Pal. Strat. I. 221. [1850.] (Tere- 
bratula causoniana. ) 
PF’ None: 
Tl. ‘France, Angy-sur-Aubois, St. Didier, prés de 
Lyon, Nancy, Metz.” 
Hor. ‘* Sinemurien.” 
