320 Transactions of the Society. 



One of them has a Long neck devoid of external ornament, another 

 is entosoleniau with a small produced external aperture. The afnni- 

 tiea between tin- rugose L«u<-i\;i: have been recently made the subject 

 of an ingenious study by Signor Fornasini.* 



345. Lagena lineatu Williamson sp. 



Entosolenia Uneata Williamson, 1848, Ann. and Mag. Nat. Hist., ser. 2 vol i. 



p. 18, pi. ii. fig. 18. 

 Entosolt in', i ghbosa, var. Uneata Williamson, 1858, Eecent Foraminifera of Great 



Britain, p. 9, pi. i. fig. 17. 

 Lagena caudata (d'Orbij-ny) Parker and Jones, 1862, Carpenter's Introduction 



to the Foraminifera, Appx. p. 309. 

 Lagena Uneata (Williamson) Reuss, 1863, Sitzungsb. d. k. Akad. Wiss. Wien, 



vol. xlvi. p. 328, pi. iv. fig. 48. 

 Ditto. (Williamson) Brady, 1884, Foram. ' Challenger,' p. 461, pi. Mi. fig. 13. 

 Ditto. (Williamson) Brady, 1887, Synopsis British Eecent Foraminifera. 

 Ditto. (Williamson) Millett, 1901, Malay Foraminifera, Journ. E. Micr. Soc, 



p. 7. 



Numerous specimens, the majority recent, a few pyritized fossils. 

 The species is common in recent British shore-gatherings and has 

 been recorded from Post-Tertiary deposits in Scotland and Ireland. 



346. La;jena orbignyana var. walleriana J. Wright. 



Lagena orbignyana var. walleriana Wright, 1886, Proc. E. Irish Acad., ser. 2, 

 vol. iv. p. 611; and ibid. 1891, ser. 3, vol. i. p. 481, pi. xx. fig. 8. 



Ditto. (Wright) Millett, 1901, Malay Foraminifera, Journ. E. Micr. Soc, 

 p. 627, pi. xiv. fig. 19. 



One specimen, fossil, probably from an Eocene shell sand. This 

 variety, which has the centre of the convex faces ornamented with 

 a solid boss of shell-substance, was recorded by Wright from dredg- 

 ings at various depths off the south coast of Ireland, but does not 

 appear to have been noticed previously in the fossil condition, 

 although its fossil distribution probably coincides more or less 

 with that of the type, i.e. from the commencement of Tertiary 

 time-. 



317. Lagena perlucida Williamson. 



(Plate X. fig. 13.) 



Lagena vulgaris var. perhccida Williamson, 1858, British Eecent Foramini- 

 fera, p. 5, figs. 7, 8. 



Many typical examples, all recent. 



Williamson's figures represent transition types between L. Isevis 

 Montagu sp. and L. semidriata Will sp. and L. sulcata W. & J. 

 sp., hut hardly referable to any of these three species. 



As such they are perhaps worth recording under their original 

 name, although having no specific value. 



* 0. Fornasini, Eevisione delle Lagena scabre fossili in Italia. R. Accad. ScL 

 dell' 1st. di Bologna, 27 Feb. 1910. 



