24 Prof. P. M. Duncan on the 
Fig. 81. Mucronella spinosissimna, MacG. Aperture, showing deuticles, 
x 60. 
Fig. 82. Mucronella diaphana, MacG. Aperture, showing denticles, x 50. 
Fig. 33. Mucroneila Peachii, Johnst. Aperture, showing denticles, x 50. 
Fig. 34. Smittia Napier, Waters, X 25. 
Fig. 35. The same, X 85. 
Figs. 36, 37. Evxvochella longirostris, Jullien, X 85. 
Fig. 88. Mucronella variolosa, Johust., X 50. 
Fig. 39. Smittia Smittiana, Busk, Aperture, X 50. 
II.—On the Cretaceous Species of Podoseris, Dune. 
By Prof. P. Martin Duncan, M.B. (Lond.), F.R.S., &e. 
[Plate V.] 
CONTENTS. 
List of old and new Species. 
Reconsideration of the old and Description of the new Species. 
Young Forms of Podoseride. 
Remarks upon some Morphological Details. 
A VERY interesting collection of Corals, numbering nearly 
140 specimens, has been entrusted to me by Thomas Jesson, 
Esq., F.G.S., who obtained them from the Red Chalk of 
Norfolk. The species do not assist the stratigraphical 
geologist in fixing a definite horizon for that interesting Cre- 
taceous deposit. They are all members of the genus of 
Lophoserine Fungida which I established in 1869, under the 
name Podoseris (Pal. Soc. 1869, Monogr. Brit. Foss. Corals, 
2nd ser. pt. ii. no. 1, p. 25) *. The species have not been 
found away from the Red Chalk. The great variability of 
the species of this genus was noticed in the essay which con- 
tained the generic diagnosis, and it is very evident after 
examining the collection lately received. The species P. 
elongata and P. mamilliformis have some very remarkable | 
varieties, which are now described, and it is satisfactory to 
find amongst Mr. Jesson’s treasures a perfect and unworn 
specimen of the last-named species. The diagnosis of both 
of the original species requires slight modification, and it is 
advisable to add some new species to the genus. 
* The genus was considered during the publication of the “ Revision of 
the Madreporaria” (Journ. Linn. Soc., Zool. 1884, vol. xviii. p. 153), and 
it was placed in the Podoserioida, an alliance of Lophoserines. It has of 
course no affinity with Réczangia, Kd. & H., as has been suggested. 
