'& 



STIGMOPHORA. 



B. Valve having hyaline spaces (sulci) together making the 



figure of a lyre. 



M. Braunii Grun. ! (Verh. Wien. 1863, pi. 13, f. 2 ; H.V.II. Atl., 

 pi. 4, f. 21, 22* Type No. 49), plate 2, fig. 66. 



Valves lanceolate, with apices obtuse, slightly produced ; loculi numerous, 

 those in the centre considerably larger than the others ; central nodule 

 prolonged laterally ; striae about 18 in 1 c.d.m., finely punctate, interrupted 

 on each side of the raphe by a long hyaline line united to the central nodule. 

 Length, 5 c.d.m. 



Brackish water. Heyst (Deby), England (Kitton), North Sea, 



Var. pumila Grun.! (H.V.H. Atl., pi. 4, f. 23). Small, slender, 

 with hyaline spaces in a double curve ; striae 23 to 24 in 1 c.d.m. 

 Length, about 3 c.d.m. 



Not yet found in Belgium. 



Some authors include the Ortlioneis in the genus Mastogloia in con- 

 sequence of their marginal loculi ; we have preferred to retain them in the 

 Cocconeideae, to which they appear to have greater affinity, on account of 

 their structure as a whole. 



GENUS 4*. STIGMOPHORA WALLICH, i860. 



The genus Stigmophora was created by Wallich for two species of 



Mastogloia from Bengal. These 

 two species differ from Mas'ogloia 

 in the first place in the number 

 of the loculi which are only two, 

 and next in each of the loculi, 

 according to Wallich, having a 

 central dot, but this we have 

 been unable to discover in the 

 example of St. rostrata in our 

 possession. 



The two species of stigmo- 

 phora are St. lanceolata Wall. 

 (represented in the text) and St. 

 rostrata Wall, which is distin- 

 guished by its apices being ex- 

 tremely rostrate, produced, and 

 bearing 7 to 8 coarse dots on the 

 raphe. 



The genus Stigmophora should 



Fig. 28. Stigmophora lanceolata, 

 after Wallich. 



