702 ME. W. M. HOLMES ON EADIOLAEIA. FROM THE [Nov. I9OO, 



= •18 mm. Breadth of sixth segment ='155 mm. Breadth of 

 second segment =-10 mm. Height of first segment = *07 mm. 

 Breadth of first segment ="065 mm. 



This form is allied to B. multicostata, Zittel, but is about double the 

 size. 



DlCTYOMITRA sp. a. (PI. XXXVIII, fig. 5.) 



The test is slender, conical, with a very rough surface, and with 

 six segments separated by deep constrictions. Length and breadth 

 of the joints gradually increasing towards the base. Height 

 = •285 mm. Breadth of last segment ='11 mm. Breadth of 

 third segment =-55 mm. Pores not shown. 



This form is allied to D. polypora, Zittel, from the Cretaceous 

 rocks of Brunswick. 1 



BicTYOMiT^A sp. (3, (PI. XXXVIII, fig. 6.) 



The test is conical, with six or seven segments. Pores small, 

 circular, in longitudinal rows between small ribs which are pro- 

 longed below the base, forming a crenate margin. Height ='19 mm. 

 Breadth of basal segment = -09 mm. 



DlCTYOMITRA Sp. y. (PI. XXXVIII, fig. 7.) 



The test is long and narrow, conical, with eight segments. The 

 first segment is dome-shaped. Total height =*20 mm. Greatest 

 breadth of basal segment =-09 mm. Breadth of first segment 

 = •03 mm. 



DlCTYOMITRA Sp. C. (PL XXXVIII, fig. 8.) 



The test is conical, slightly ventricose, with five segments. There 

 are indications of pores between the segments. Height of test 

 = •125 mm. Breadth of basal segment ='06 mm. 



DlCTYOMITRA PAGODA, Sp. 110V. (PI. XXXVIII, fig. 9.) 



The test is large, conical, with seven segments of uniform height. 

 The first segment is sharply conical. The segments at the upper 

 part of the test are studded with tubercular prominences. 



It is uncertain whether the hexagonal pores are original, or due 

 to corrosion. Height of test =-31 mm. Height of segments 

 = '05 mm. Basal segment slightly smaller than the one above. 

 Greatest breadth =*14 mm. 



This form differs from D. tiara, PI. XXXVIII, fig. 4, in the 

 conical apex, less inflated segments, smaller size, and the presence 

 of tubercles. 



Dictyomitra regtjlaris, Perner. (PI. XXXVIII, fig. 10.) 



Test large. The upper portion is regularly conical. The seg- 

 ments number either eight or nine, the lowest three being somewhat 

 inflated. The surface is rough, and the pores are secondary. Height 

 of test =-31 mm. Breadth of basal segment =*10 mm. Breadth 

 of segment next to the base =*115 mm. 



1 Zeitschr. d. Deutsch. Geol. Gesellsch. vol. xxviii (1876) p. 75 & pi. ii, fig. 1. 



