KOKENOSPIRA LINGUALJS. 85 



dorsum, siibangular ? umbilical edge, and short rather steep umbilical slope. 

 Slit-baud broad, slightly raised, with 18 — 20 closely-placed, regular, thick, 

 revolving parallel lines on each side of it, rather smaller and more crowded close 

 to it, 4 — 5 lines lying in a space equal to its width. No revolving lines on 

 umbilical slope. A few concentric transverse growth-lines are developed close 

 to the apertural margin. 



Dimeitsio)is. — Height of shell, about 15 mm. 



Horizon. — Llandovery Series : Camregan Group. 



Localitij. — Cuddystone Glen, near Girvan. 



ReniarJiS. — Though this species is based on only one specimen in Mrs. Gray's 

 Collection, yet the characters are sufficiently well marked and distinctive as to 

 prove that it cannot be placed in any previously described species, though it is 

 allied to several of the other Girvan forms defined below. 



3. Kokenospira latidorsata, sp. nov. Plate VII, fig. 2, 



Specif c Characters. — Shell suliglobose, of 3-4 low transverse whorls. Uml)ilicus 

 ver}^ large, conical, deep, about four-fifths the diameter of the shell. Outer whorl 

 increasing slowly in width to mouth, with very transverse cross-section. Dorsum 

 broad, slightly convex ; umbilical edge subangular. Slit-band somewhat elevated, 

 broad, not well preserved. Umbilical slope flattened, making an angle of about 

 30° with dorsum. 



Dimensions. — Height of shell, 19 mm.; width of uml)ilicus, 14 mm. 



Horizon. — Bala Series. 



Locality. — Cardington, Shropshire. [G. 2070G Bi'it. Mus.] 



Remarlis. — Only one internal cast of this species is known, but it shows the 

 entire shell with the dorsum and the wide-open umbilicus. It is uncertain if the 

 surface has any ornament, and the details of the slit-band cannot be observed. 

 The allied species, K. maccullocJii, from the Balclatchie Beds, differs by possessing 

 a less acute umbilical edge and more rounded whorls. 



4. Kokenospira lingualis (Salter). Plate VI, fig. IG; Plate VII, fig. 1. 



1854. Bellerophon (Bucania) sidcatinus,Enuuons? , Salter, Quart. Jouru. Geol. Soc, vol. x, pp. 68, 74, 



(nom. j)rop. B. linguatis). 

 ? 1884. Belleroplioa sulcatinus, Emmons, J. D. La Toucbe, Handbook to the Greology of Shropshire, 



p. 59, pi. V, fig. 101. 



Specific Characters. — Shell subglobose, discoid, of few whorls. Umbilicus 

 deep, about three-fifths the diameter of the shell ; umbilical edges narrow, 

 subangular ; umbilical slopes steep. Whorls transverse, more than twice as 

 wide as high, very slowly increasing in size ; dorsum gently convex, becoming 



