FROM THE NORTH SEA. 131 



(37) Vemeuilina polystropha Reuss sp. All the specimens of 

 this species, one of the most abundant and typical North Sea 

 forms, belong to the large coarsely built type, except in Haul 770 

 Northern Area, where also a few individuals of the minute and 

 delicate type described and figured by us in the Clare Island 

 Survey Report were observed. 



(38) Clavulina obscura Chaster (PI. 10, figs. 7, 8), occurs in 

 both Areas, but whereas the Northern Area yielded only a single 

 specimen, the species attains an extraordinary development both 

 as regards size and abundance in Haul 871 in the Southern 

 Area. It is usually a very rare species, though widely distributed 

 round our coasts in muddy gatherings. 



(91) Lingulina carinata d'Orbigny. The single specimen from 

 Haul 869 Southern Area is of a minute type. Such specimens 

 occur sparingly in most of the " Goldseeker" dredgings from 

 muddy areas. 



(92) Marginulina glabra d'Orbigny. The single specimen from 

 Haul 871 is very minute. Rut the species is abundant and 

 attains a very large size in the deeper waters of the North Sea 

 to the N.E. of Shetland. 



(106) Globigerina rubra d'Orbigny (PI. 10, figs. 13-15). This 

 species is one of the commonest Globigerinae all over the North 

 Sea and often forms a large proportion of the finer material 

 dredged on muddy bottoms. 



(110) Discorbina Chasterl Heron-Allen and Earland. Origin- 

 ally described by the late Dr. Chaster of Southport under the 

 specific name Discorbina minutissima. This specific name having 

 been previously used by Seguenza for another form, we have 

 (in the Report on the Foraminifera of the Clare Island Survey) 

 renamed the species after its original discoverer. It is of common 

 occurrence in muddy dredgings from all the shallow coastal 

 deposits of the North Sea and around the Western shores of 

 Britain generally. 



(112) Discorbina Mediterranensis d'Orbigny sp. and (115) Dis- 

 corbina Peruviana d'Orbigny sp. are old specips which we propose 



