R. F. Tomes — Inferior Oolite Ufadreporaria. 395 



calicular margin, which is sometimes partially everted as in the speci- 

 men originally described. The thickness of the septa near to and at the 

 wall is observable in all the specimens I have seen, and is a dis- 

 tinctive character. 1 It occurs in the Pisolite at Crickley Hill, Leck- 

 hampton Hill, and at Huddiknoll near the Horsepools, and a single 

 example has been taken from a sandy bed immediately above the 

 Upper Lias sands at Dover's Hill near Chipping Campden. 



Montlivaltia de la Bechei, MM. Milne Bdw. and Haime. 



I have collected specimens of this species from the well-known 

 section of the Inferior Oolite at Frocester Hill, where it is confined 

 to the upper layer of the compact stone marked C in Dr. Wright's 

 section, 2 which immediately underlies the equivalent of the Pisolite. 

 The stratigraphical position corresponds therefore with that of the 

 allied species Montlivaltia lens at Crickley and Leckhampton Hills. 

 It is by no means rare at Frocester, but is with difficulty extracted 

 from the stone. I have also taken this species from an exposure of 

 a few feet of Inferior Oolite in the road leading from Bath to Combe 

 Down, at a place called Holloway, and by the kindness of Mr. 

 George I have had the use of a number of small examples which 

 had been collected at Dundry. By the list of Dorsetshire species it 

 will be seen that it occurs in several places in that county. 



Montlivaltia oupulifoemis. 



A single example of this species was all I had seen in 1882, and 

 no other one has been met with from the same locality. I have, 

 however, been favoured by Mr. S. S. Buckman with several ex- 

 amples from the Inferior Oolite of Bradford Abbas. In the original 

 specimen obtained by me from Crickley, the adherent base is as 

 broad as is represented in the figure given by the original describers, 

 but in those from Bradford Abbas the constriction near the foot is, 

 generally speaking, much greater, and the upper part of the corallum 

 much more globose. None of the specimens from Mr. Buckman are 

 attached, the narrow foot having been fractured. 



Montlivaltia sp. 



There is a very distinct layer about the middle of the Pisolite at 

 Cleeve Hill, Cheltenham, containing large flat concretions. Some of 

 these are much overgrown with Bryozoa and small sponges, and 

 occasionally a very young and attached Montlivaltia may be observed. 

 The species is not determinable, none of the examples yet examined 

 having attained to any visible height, while the greater number of 

 them have not even reached that period of growth when the in- 

 closing wall first shows itself. 



1 I think it right to suggest the possibility of this and some other MontlivaltiaB 

 having wavy and everted margins, being merely the peduncles of a compound genus. 

 The abnormal septa of the present species, as well as the excessively numerous ones 

 of the species from the Middle Lias of Charmouth which I have described under the 

 name of Montlivaltia foliacea, may prove to be costal prolongations of the septa in 

 progress of development preparatory to gemmation. 



2 Quart. Journ. Geol. iSoc. vol. xvii. p. 9, 1860. 



