D. M. S. Watson — On Linuilus Woodnardi, Loicer Oolite. 15 



Avhich lie at once recognized. This specimen he has now presented to 

 the Manchester Museum, and by his kindness I am enabled to offer 

 a short description of it here. 



The fossil consists of an iron-stained cast of the dorsal surface of 

 a carapace, the left side of which had suffered considerable abrasion 

 before the specimen was collected. The matrix is a grey, fine-grained 

 sandstone, somewhat calcareous, and containing small Pelecypods and 

 apparently some oolitic grains. I do not know any rock exactly like 

 it from any other locality, but it considei^ably resembles some types of 

 the Jforthampton sand to which it almost certainly belongs, as most 

 walls in the neigh botirhood are built with rocks belonging to that 

 formation. Despite this uncertainty as to the exact horizon of the 

 specimen, it seems to me worth description as being the only known 

 example of a Mesozoic Mero.stome in Britain. 



Cephalic shield or carapace of Limuhis Woodwnrdi, Waison, sp. iiov. Natural pize. 

 From the Inferior Oolite (?) of Doddington, Northamptonshire. 



The anterior edge of the carapace is smooth and forms a large arc 

 of a circle, considerably more than 180°. 



The posterior edge of the carapace is bounded by three distinct 

 lines ; these are a central, nearlj' straight edge, to which the abdomen, 

 was attached. This attachment is about half the entire width of the 

 carapace, and is considerably in advance of the genal angles. From 

 the ends of this line two other edges curve out in gentle ogees to the 

 genal angles. These angles are not produced, but end in blunt spines. 

 The edge of the carapace along these lateral portions is curved 

 downwards, forming a groove. 



The carapace bears the following marks : — In the centre, starting 

 from the back, is a distinct area — the glabella — separated by grooves 

 from the general surface. These bounding grooves approach each 



