Geological Society of London. 323 
The specimen described is a portion of the shield from the anterior 
dorsal region, and was obtained from the later Tertiary deposits of the 
borders of Croatia. It was originally regarded by Von Meyer as the 
armour of an Edentate mammal, but it was afterwards suggested by 
him and Prof. Fuchs that Sphargis presented a nearer affinity. A 
keel runs along the middle of the specimen, and is regarded by the 
author as one of the outer folds of the shield. The dermal skeleton is 
made up of irregularly polygonal plates of various sizes, closely 
resembling those of Sphargis, except that each plate is almost twice as 
large as those of that form. The plates usually show a radiate orna- 
ment on the surface. On the underside of the slab are the remains of 
several vertebrae, apparently from the base of the neck, and these differ 
from the vertebree of all known Chelonians in having strong transverse 
processes for the attachment of ribs. The neural arch, like the pro- 
cesses, is anchylosed to the centrum. The author considers that the 
dermal skeleton is not represented in the carapace of ordinary Chelonia, 
but is represented by the granulations on the surface of the carapace of 
the Trionychide. He is hence led to indicate three primary divisions 
of the Chelonian order—viz. 1. Aspidochelyide, in which the bony 
carapace is covered with symmetrical horny scutes, including Turtles, 
Emydians and Tortoises; 2. Peltochelyide, in which the bony carapace 
has a granular surface-structure, and is covered with an undivided 
dermis without scutes, including only the Trionychide ; and 3. The 
Dermatochelyida, in which the carapace is not developed, but is func- 
tionally represented by a bony skeleton within the skin, asin Sphargis 
and Psephophorus. 
3. “On the Occurrence of the Glutton (Gulo Juscus, Linn.) in the 
Forest Bed of Norfolk.” By E. T. Newton, Esq., F.G.S. 
Remains of the Glutton have hitherto been obtained only from cave- 
deposits. The author has lately received from Mr. R. Fitch, of 
Norwich, a portion of the lower jaw of this animal obtained from the 
Forest-bed of Mundesley, Norfolk. The specimen consists of about two 
inches of the left ramus, bearing the first true molar and the hinder 
half of the fourth premolar in place. The jaw is smaller than in 
average specimens of the recent Glutton, but presents all the characters 
of the species as described in detail by the author. 
4. “A Review of the Family Diastoporide, for the Purpose of 
Classification.” By George Robert Vine, Esq. Communicated by 
Prof. Duncan, F.R.S., F.G.S. 
This family of the Cyclostomatous Polyzoa, never very prolific, has 
representatives from the Lower Silurian era to the present time, and is 
now northern and of deep-sea habit. The author discusses the limits 
of the family, and gives a list of the recent and fossil genera and 
species included in it. He points out that there are important differ- 
ences in the Palzeozoic forms, several of which, though he leaves them 
provisionally among the Diastoporide, he considers, on fuller examina- 
tion, will have to be removed. The author describes the characteristics 
of some Paleozoic genera of true Diastoporide. 
5. “On Annelid Jaws from the Wenlock and Ludlow Formations of 
the West of England.” By G. J. Hinde, Esq., F.G.S. 
Referring to his paper on annelid jaws from the Palzozoic rocks of 
