8 



BRITISH FOSSILS. 



N. amhitu suborbiculari, subsinuato, lateribus decliventibus ; dorso convexo apice sub- 

 excentrali, supra-anali, vertice excentrico ; ambulacris lanceolatis. ad apices approximatis ; 

 sulco anali oblongo, obtuso, lata, brevi, ab vertice disiante ; lobis posterioribus obsoletis ; 

 ventre cojicavo, ore valde excentrico. 



About the size of the last. Inferior oolite of Stroud (Mr. J. G. Lowe), communicated 

 by Mr. Woodward. 



5. Nucleolites sinuatus (Sp.), Leske. Parkinson, Org. Rem., vol. iii., pi. 2, fig. 1. 2. 

 Galerites patella, Lamarck (? of Agassiz, Echin. Suisses). 



]V. ambitu orbiculari, lateribus decliventibus ; dorso subdepresso, apice vertice-que vix 

 centrali ; ambulacris late lanceolatis, ad apices approximatis; sulco anali lanceolato 

 acuminato, in verticem prolongato, pro/undo, lateribus abruptis ; lobis posterioribus nullis ; 

 ventre concavo. 



Two inches and a half, or more, in diameter. Cornbrash, great oolite, inferior oolite, 

 and coralline oolite in many places. ^ 



In the " Catalogue Eaisonne des Echinides," of Agassiz and Desor, there is a Clypeus 

 rimosus, " Espece plate, discoide a ambulacres costules," evidently nearly allied to this 

 species, and said to be from oolitic strata in Gloucestershire ; it is in the collection of M. 

 Deluc. 



6. Nucleolites emarginatus (Sp.), Phillips, Geol. of Yorkshire, vol. i., t. 3. f. 18. 



JV. ambitu orbiculari, lateribus decliventibus ; dorso subdepresso, apice vertice-que vix 

 centrali ; ambulacris late lanceolatis, ad apices approximatis, sulco anali brevissimo, obtuso, 

 ab vertice valde distante ; lobis posterioribus obsoletis. 



As large as the last species. In the coralline oolite of Yorkshire. 



Besides the above-named species, there is a small Nucleolite from the great oolite of 

 Harleston, apparently distinct, allied to clunicularis. In the British Museum. 



In the same collection there is also a small species from the inferior oolite of Stroud, 

 which is probably new. See also Mr. M'Coy's paper in Ann. N. H. -3rd ser. vol. ii, p. 417. 



B. Species of the Cretaceous Type. 



7. Nucleolites cordatus, Goldfuss, Pet. Germ., pi. 43, fig. 9. 



N. ambitu ovato-rotundo, antice rotundato postice vix bilobato ; dorso convexo, apice 

 vertice-que centrali ; ambulacris anguste lanceolatis ; sulco anali pro/undo, late-lanceolato, 

 superne subacuminato, lobis posterioribus tumidiusculis. 



Upper green sand of Wiltshire. In Mr. Tennant's collection. The specimen agrees in 

 form, tumidity, and size, with that figured by Goldfuss. It is not so distinctly lobed pos- 

 teriorly, and the anal furrow is not so narrow or acuminate. 



8. Nucleolites lacunosus, Goldfuss, Pet. Germ., t. 43, fig. 8. 



N. ambitu ovato, antice obtuso, postice subquadrato, subtrwicato, lateribus subcompressis ; 

 dorso convexo, apice subcentrali seu supra-anali, vertice excentrico ; ambulacris lanceolatis, 

 lateribus subrectis ; sidco anali prof undo, brevi, oblongo, abrupte declivente, lobis posterioribus 

 subdepressis ; ventre excavato. 



Specimens are usually about half an inch in length. Common in the upper green sand 

 of Warminster (Survey Collections). 



9. Nucleolites Morrisii, Forbes ; Cassidulus lapis cancri, Morris, Cat. p. 49 (not of 

 Goldfuss). 



N, ambitu oblongo, antice postice-que obtuso, lateribus] depressis, dorso depresso, apice 

 subcentrali, vertice centrali ; ambulacris linearibus ; sidco anali profundo, brevissimo, sub- 

 triangidari ; lobis posterioribus nullis ; ventre excavato. 



Large specimens are half an inch in length. Upper green sand of Warminster and 

 Blackdown (Mus. Tennant). 



E. Forbes. 



April, 1849. 



