VEEEUCULIiSrA. 39 



Verruculina pustulosa, tiinde, n. sp. (Plate III. figs. 2, 2 a.) 



1845. Manon miliare, Reuss, p. p., Bohm. Kreide. p. 78, t. 19. f. 13. 



1864. Chenendopora tenuis, F. A. Roemer, p. p., Palseont. Bd. 13, t. 15. f. 4, non Manon 

 tenue, F. A. Roem. Nordd. Kreide, 1. 1. f. 7. 



Sponges wide funnel-shaped, formed by a convoluted plate, which generally over- 

 laps at the margins. The walls are from 4 to 5 mm. in thickness; the margins are 

 rounded and of the same thickness as the walls. An average specimen is 64 mm. in 

 width at the summit, and 42 mm. in height. 



The upper or inner surface is covered with small projecting oscules 0"5 mm. in 

 width, disposed in horizontal lines about 1 mm. apart. The oscules have thickened, 

 slightly projecting margins, and are about their own diameter from each other. The 

 under surface has similar but slightly smaller oscules, disposed either irregularly or 

 in sinuous lines. 



There are several examples in the collection which have the same distinguishing 

 features, and thus appear to belong to a distinct species, characterized by thin 

 walls, the regular horizontal disposition of the oscules of the inner surface of the 

 walls, and the closely arranged oscules of the outer surface. The examples of 

 this species are also, as a rule, smaller than those already described. Eeuss has 

 figured [Jog. cit. t. 19. f. 13) a fragment of a specimen of this species, and included 

 it in his Manon miliare ; but there is clearly a specific difference between this and 

 the other forms (figs. 10, 11) which he has placed under this name. The Chenen- 

 dopora tenuis, figured by F. A. Rcemer in the ' Palseontographica ' [l. c. f. 4), has the 

 same disposition of the oscules of the inner surface as the present form ; but it is 

 different from the figure of the original type of his species in the 'Nordd. Kreide' 

 {I. c. f. 7), to which alone the name should be applied. 



Distribution. Upper Chalk : Flamborough. 



Verruculina miliaris, Beuss, sp. (Plate III. figs. 3, 3 a.) 



1846. Manon miliare, Reuss, p. p., Bohm. Kreide. p. 78, t. 19. f. 10-12. 

 1878. Amphithelion miliare, Zittel, Stud. II Ab. p. 60. 



Sponges fan-shaped, or, by the coalescence of the incurved margins, becoming 

 funnel-shaped. The margins rounded, and of the same thickness as the walls. In 

 some examples the margins are extended into finger-like projections. The walls are 

 from 5 to 8 mm. in thickness. The largest specimen in the collection is ]00 mm. 

 wide at the summit, and 98 mm. in height. 



The upper or inner surface with sparsely scattered oscules 1"2 mm. wide, which 

 strongly project, obliquely upwards, from the surface. The apertures of the lower 

 surface of the wall are 0'5 mm. in width, with slightly projecting margins; they are 

 about their own diameter apart, and not infrequently disposed in sinuous lines. The 

 spicular structure and the interior canals are destroyed in all the specimens. 



