28 Messrs. Jukes-Broivne and Milne — 



fine sand. The abundance of sponge spicules shows that the con- 

 ditions were such as to favour the growth of siliceous sponges. 



Beinarhs on some of the Fossils. 



The collection sent to me includes some species which have not 

 yet been recorded from the Moreseat rock, and as these are all 

 Lower Cretaceous forms, the Vectian element in the fauna is clearly 

 very strong — so strong indeed that I am led to doubt the existence 

 of some of the Upper Cretaceous species which have been supposed 

 to occur. I shall thei-efore offer some remarks on certain species, 

 and give a complete revised list of the Moreseat fauna, so far as 

 it is at present known. 



Micrahacia coronula, Goldf. — This identification requires confirma- 

 tion. It depends solely on Saltei''s authority, for the specimen 

 he saw is not in the Jermyn Street Museum, and no other 

 specimen has been detected in the collections recently made. The 

 species is not known to occur below the Upper Greensand zone of 

 JPecten asper, and would be difficult to recognize from a cast only. 



JEcJiinobonus castanea, Brong. — This also requires confirmation, for 

 the specimen so named b}'^ Mr. Salter has not been found at Jermyn 

 Street, and no other example has been seen. In England its 

 earliest appearance is near the top of the Upper Greensand, but 

 in Switzerland it ranges down to the base of the Gault (see De 

 Loriol in "Echinologie Helvetique"), so that it may in some localities 

 range even lower. No species of Echinocouus, however, has yet 

 been recorded from rocks of Lower Cretaceous age. 



Discoidea decorata (?), Desor. — This specimen was among those 

 sent by Mr. Milne. It consists of a nearly perfect external mould 

 in two parts. It differs from D. suhucida in having close-set 

 rows of nearly even-sized tubercles, eight rows on the inter- 

 ambulacral areas, four on each set of plates, and four rows on 

 the ambulacral areas ; but the two inner ambulacral rows do not 

 reach either to the apex or to the peristome. The mouth and vent 

 are both rather large. In these respects it agrees with D. decorata. 



Mr. C. J. A. Meyer having informed me that he possessed 

 specimens of a Discoidea from the Vectian of Hythe, the Moreseat 

 specimen was sent to him for comparison. He reports that it agrees 

 with those from Hythe, but he is doubtful whether they are 

 referable to D. decorata, Desor, or J), macropyga, Ag. Both are 

 Lower Cretaceous species. 



Wiynclionella compressa. — The specimen so named by Salter is at 

 Jermyn Street, and has been examined again by Messrs. Sharman 

 and Newton, with the result that they think it is only a compressed 

 variety of Bh. sulcata, Park. As specimens of Bh. sulcata are not 

 uncommon at Moreseat, and as it is a veiy variable form, Bh. 

 compressa may safely be excluded from the list. 



Waldheimi(( faba, D'Orb. [non Sow.).— One specimen apparently 

 referable to this species is among those sent to me. As it is only 



