KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 32. N:0 I. 109 



where it forms a thin polypary with the dimensions of 15 X 7 millira. The thickness of 

 the whole amounts only to 0,5 mm. The tiny calicles are scarcely 0,5 millims. in diameter, 

 the short septa triangulär with small tubercles on their surface and larger ones on the 

 central area. The coenenchyma is bristling with blunt points surrounding irregularly 

 stelliform pits. In the weathered specimen figured (fig. 11) from the same locality the 

 spines are gone and the funnelshaped pits are raore visible. If this variety, which belongs 

 to a higher hoi"izon than the English species, must be denominated, I propose to call it 

 Cocc. megastoma, var. minor. 



Coccoseris inicraster n. 



Pl. XII, figs. 16—18. 



This little coral has the form of a sphasroid of only 13 millims. in diameter. The 

 stellulate calicles have a diameter of only 0,3 millimeter, being the sraallest known of all 

 described in this raemoir. They are remote from each other and they radiate from the 

 initial centrum towards all points. The septa, as seen on the surface, are triangulär, broad 

 and stretch near to the centre of the calicle, where there are two or three columellar tubercles. 

 In a longitudinal section the septa are well conspicuous, being of the same structure as in Cocc. 

 Ungerni with the characteristic curved baculi. The large columella, formed of baculi also 

 exhibits the pinnate structure. The coenenchyma, which is copious, consists of minute 

 stellulate pores, surrounded by the chief mäss of thick, closely packed, straight baculi, of the 

 common pinnate structure, which is here well represented. There are no dissepiments at all. 



This species is known only from a single specimen found by the late Mr Wegelin, 

 to judge by the colour of the rock from Ostbjörka, Dalecarlia, consequently from the 

 Lepttena liraestone. 



Gen. Protarcea. M. Edw. & H. 



1850. Astrpeopora d'Orb. Prodr. I, p. 25. 



1851. Protaraja M. P^DW. & H. Pol. terr. pal., p. 146. 

 ? 1856. Diplastrtea ElCHWALD. Bull. Moscou, p. 111. 



1866. Stylarsea VON Seebach. Nachrichten von der K. Gesellseh. der Wissenschaften zu Göttingen, p. 238. 



Corallum growing in a thin crusta on brachiopoda and shells with close set or 

 contiguous calicles, between which there is no coenenchyma or very little of it, distinguished 

 by shallow pits. Twelve granulated septa surround the papilla? in the centre of the 

 calicle. No tabulse, nor dissepiment. Entire sceleton made up of closely united, robust 

 baculi, showing the pinnate structure forming a compact mäss. 



There is nothing in the sclerenchyma of this genus that justifies its being placed 

 in the order of the Perforata of Milne Edwards and Haime as it is an almost solid mäss 



K. Sv. Vet. Akad. Haiidl. Band 32. N:o 1. 14 



