298 BRITISH PALAZOZOIC FOSSILS. (GAsTEROPODA. 
I think the whorls are only connected by the keel in this rare species, which would therefore form a 
connecting link between Huomphalus and those evolute species forming the genus called Kecyliomphalus, 
Serpularia, and Phanerotinus, by different authors. 
Position and Locality.—Rare in the Pentamerus limestone of Leintwardine, Shropshire. 
EvoOMPHALUS DISCORS (So7.) 
Ref—la. id. Sow. Min. Con. t. 52. f. 1. 
Sp. Ch.—Discoid, spire depressed below the level of the last whorl, of about three whorls in the adult 
(with a hole in the centre from which the dead, early turns of the spire have fallen); upper fourth of 
the basal whorl sloping downward and inward, slightly concave or convex, and bounded externally by an 
obtuse spiral ridge, from whence the sides (or second quarter) slope outwards to a similar thick ridge at 
the circumference, there being one less prominent ridge midway between these two; lower half of the 
volutions rounded ; all the turns half exposed in the wide umbilicus; surface of upper half of the volutions 
crossed by slightly-flexuous, irregular, imbricating laminze (about six or seven in the space of one line), 
forming thick scales on the ridges; the under half of the turns has the striation abruptly finer and closer 
from the lower side of the ridge of the circumference. Diameter two inches five lines, proportional diameter 
of last whorl 2, depth of last whorl ;;;, diameter of umbilicus =. 
Position and Locality—Common in the Wenlock limestone of Wenlock, Shropshire; Wenlock lime- 
stone of Woolhope. 
EvoMpHALUS FUNATUS (Sow.) 
Ref —Id. Sow. Min. Con. t. 450. f. 1. 2. 
Sp. Ch.—Very obtusely conic; apical angle about 135°; spire of little more than two very convex whorls 
(rarely more than one and half present); mouth nearly circular, sutures deep, umbilicus very small, rounded ; 
surface girt with about twenty round, subequal, cord-like spiral ridges, about equal in thickness to the space 
between them; the eight or nine on the upper aspect of the volutions a little larger than the others; three 
or four larger than the rest within the umbilicus; all crossed by fine, direct, sharp lines of growth. Average 
diameter one inch two lines, proportional height =, height of mouth =;. 
The wider spaces between the ridges and strong transverse scaly lines of growth distinguish this species 
from the L. sculptus, in which the ridges are very close and smooth. 
Position and Locality—Abundant in the Wenlock limestone of Wenlock, Shropshire ; Wenlock lime- 
stone of Woolhope ; common in the sandstone of May Hill. 
EvomMpHatus tyratus (M<Coy). Pl. 1. L. fig. 23. 
Sp. Ch.—Spire only slightly elevated, of two very convex turns, each with three narrow spiral ridges, one 
at the upper suture, one considerably above the middle of the body whorl and corresponding to the lower suture 
on the spire, and the third half-way between these two; surface crossed by slightly oblique, thin, cord-like 
ridges, nearly twice their thickness apart. Diameter about six lines, proportional height about =. 
Only one imperfect specimen has occurred of this obviously distinct species, not allowing of the characters 
of the base or spire being completely ascertained. 
Position and Locality—Rare in the Bala schists at Llansantfraid, Glyn Ceiriog, Denbighshire. 
Explanation of Figure.—PI. 1. L. fig. 23, natural size. 
EvoMPHALUS RUGOSUS (So.) 
ef —Id. Sow. Min. Con. t. 52. f. 2. 
Sp. Ch.—Discoid, depressed, spire slightly elevated; apical angle 140°; of about three whorls (those 
forming the apex being absent through decay); upper half of the spiral whorls and upper third of the 
