AMBERLEYA. 293 
Relations and Distribution—This form is very rare, and would seem to 
represent the most extreme phase of the large and diverse series which I have 
ventured to group under Amberleya. Both specimens occur in the Murchisonex- 
zone, the smaller one at Bradford Abbas, the larger one in the Pisolite at 
Longfords. 
Pl. XXIII, fig. 10, represents a specimen from the Murchisonx-zone of 
Stoford, which seems in some way to combine the characters of Amb. turbinoides 
and Amb. elongata. The specimen is unique, and I have not ventured to 
name it. 
226, P AmperLeya (Turso) Dunpriensis, Tawney, 1873. Plate XXIV, fig. 11. 
1878. Turso Dunpriensis, Zawney. Dundry Gasteropoda, p. 80 (22), pl. ii, 
; fig. 2. 
Description. Shell elongate, acutely conical. Whorls seven, angular, 
outline slightly convex above the keel, and then bending in towards a deep 
suture. Aperture angular, trapezoidal.” The spiral angle is about 50°. The 
ornaments are fine; it is uncertain whether there are two or three spirals above 
the keel, the one nearest the suture having the most distinct nodulations; axial 
stria conspicuous throughout. About nine spirals in the base. 
Relations and Distribution.—Mr. Tawney refers to several shells from the Lias 
which come near this shape, such as Trochus imbricatus-Suecicus, Quenstedt ; 
T. concinnus, Moore; T'. Gaudryanus, @’Orbigny. He further says, “This and 
allied forms might form a distinct genus; they seem to differ from the recent 
Turbo.” 
There can be no doubt that “ Turbo” Dundriensis takes the place at Dundry 
of Purpurina (Hucycloidea) bianor, d’Orb., already noticed in this Monograph.' 
At that time I was not aware that several of d’Orbigny’s Purpurinas were 
really Amberleyas, and that the Purpwrina-like mouth in many cases was merely 
a stage in the development of Amberleya. I should be now disposed, therefore, 
to withdraw Hucycloidea from its supposed relationship to Purpurina. Whether 
Eucycloidea should be retained or merged in Amberleya is at present uncertain. 
Since Amberleya is likely to become too large and comprehensive, Hucycloidea 
might, perhaps, be retained as a sub-genus for shells of this class. 
1 Page 95, Purpurina (Eucycloidea) bianor, d’Orb, Pl. II, figs. 5a—h. 
