OY NEW SOUTH WALES. 127 



perfectly round ; both seem deep. The margin of each of the 

 arched spaces curves round into a loop at each side below the 

 lower pore, and is curved again in a contrary direction at each 

 side so as to form another small loop in which there is another 

 small pore. Beneath the lower of the two large central pores 

 there are one or two conspicuous grooves to the base. Upper 

 convex surface covered with concave cells, with a distinct raised 

 margin ; mouth in the centre, semi-circular, with a raised margin. 

 Shape of cells from oval to circular, a few almost pentagonal ; 

 the centre of the convex surface seems covered with cells, but 

 they are worn almost smooth on both the specimens. The base 

 is vermiculate, but with a radiate tendency, and forming a 

 quinque-partite pattern. Between the margin of the five sides 

 there are upper and lower angular spaces, giving great elegance 

 to the design. 



Dimensions : Alt. 6, diam. of summit 8, of base 4|, lat. of 5 

 lateral spaces 4|, alt. Sg raillim. 



I am unable to suggest any explanation of the pores on the 

 sides or the organs which form the margins, transverse bands, 

 &c. It is quite evident that there must be some individuality in 

 these zoothomes, apart from what we call the animal which 

 dwells in the cells, or the symmetrical arrangements in this 

 specimen could not be explained. Only two were found 

 by the Chevert Expedition in all their dredgings, and 

 both these were a little worn as if they had been dead some 

 time. There is something in the species which recalls the 

 elegent forms of Polyzoa in the European chalk, but there is no 

 fossil form that I have heard of which nearly resembles it. 

 There are fossils from the Maestricht Chalk which seem to have 

 some analogy withEuhtiminaria (one species is named Glenotremites 

 ^paradoxus by Goldfuss), and geologists are not agreed upon their 

 position in classification or their character. M. d'Orbigny con- 

 sidered them as Comatulae without their arms, but there were 

 reasons for rejecting this view. The mouth (?) was surrounded 

 by five funnel-shaped openings and five petaloid grooves which 

 were probably places for the insertion of arms. All the surface 



