128 DIASTOPORA. 



DISTRIBUTION. 



BRITISH : 



Bradford Clay : Pound Pill ; Corsham. 



Great Oolite : Bath ; Hampton. 



? Inferior Oolite : Postlip (fide Haime). 



FOREIGN : 



Bathonian : Eanville ; Luc ; Marquise, near Boulogne ; La Jonneliere, 



Sarthe ; Moselle (fide Terquem). Braun Jura: Balin. 

 Bajocian: St. Quentin (fide Haime) ; Montvaux (fide Friren). 



Description of Figure. PL VII. Fig. 3. Fragment of a 

 zoariura, x 17 dia. Great Oolite: Ancliff, near Bath. 24521. 



Affinities. The almost lozenge-shaped zocecia of this species 

 are very different from those of the cylindrical zooecia of all the 

 preceding species, and it is therefore easily distinguished from any 

 of them. D. michelini (Blv.) has an approach to this form, but 

 the zooecia in that species are very crowded, and the peristomes 

 are more raised. 



The main difficulty in regard to this species is whether D. cervi- 

 cornis, Mich., ought not to be kept distinct. The difference is that 

 D. lamellosa has broad, thin fronds, and D. cervicornis narrow, thick 

 ones. At first sight, the difference appears of specific value ; but 

 in some specimens (such as B.M. D. 2092) the terminal expansions 

 are on the D. lamellosa type, and the lower, older parts of the 

 zoarium on that of D. cervicornis. D. ramosissima appears to 

 be only a fragment of this species, with the peristomes worn down. 



LIST OF SPECIMENS. 



24521. Great Oolite. Ancliff, near Bath. Cunnington Coll. Figd. PL 



VII. Fig. 3. 



D. 2223. Great Oolite. Loc. ? 



B. 2301. Great Oolite. Hampton. Var. cervicornis. 

 D. 10, D. 12. Great Oolite. Hampton. Holl Coll. Var. cervicornis. 

 D. 2135, D. 2137, D. 2141. Inferior Oolite. Near Leckhampton. Brodie Coll. 

 60220. Bathonian. Ranville. Tesson Coll. 

 60367. 



60371. ,, ,, ,, Var. cervicornis. 



D. 2219 (7 specimens). Bathonian. Ranville. Tesson Coll. Var. cervicornis. 

 60369. Bathonian. Ranville. Tesson Coll. With Entalophora cellarioides. 

 D.2092. 

 D. 2114. ,, ,, (1\&Multisparsaluceana,T)'Qi\).} 



