38 Transactions of the Society. 



Lagyiiis, in a family, Lagynidse. Squaniulina lasvis, the type, is 

 thus described : — " Shell irregularly circular, very flat, the convex 

 lialf thick, exteriorly smooth; the ])laue side very thin, and with 

 difficulty separable from the foreign bodies to which it is firmly 

 attached. The yellowish animal protrudes numerous pseudopodia 

 {Fortsdtze) from a large eccentrically placed aperture. Greatest 

 diameter • 26 mm." Biitschli in 1889 * places the genus witli 

 Nnhecularia, following Carpenter, who placed it witli the Miliolida^.t 



Carter in 1870, J disregarding the calcareous definition of Squa- 

 mulina, placed two new species in the genus, S. scopula — which is 

 only a synonym for Haliphysema tumaiioiviczii Bowerbank — and 

 S. vnrians, which is described as " white, more or less circular, 

 ])lano-convex, raised or depressed, . . . presenting all kinds of 

 forms." Carter's figures are very diagrannnatic and not of much 

 use for identification purposes, but his species iS'. varians appears 

 to be a composite of two distinct forms, which lie describes as the 

 " elevated convex form " and the " amoeboid form." There is no 

 evident connexion between the two, and the magnifications attached 

 to his figures are opposed to any such connexion. The " amoeboid 

 form " is unquestionalily the same organism as that subsequently 

 recorded and described by us, doubtfully, from Bognor and Selsey 

 Bill as Thurammina peipillata Brady (?) §. and later assigned l>y 

 us to the new genus Iriclia H-A. & E.|| 



The " elevated convex form," althoufrh suggestive of the hemi- 

 spherical early stage of /no^m recorded and figured, also doubtfully, 

 by us from Selsey Bill as Webbina hemisphtvrica J. P. & B.,1" 

 differs in many material points : — (1) its far greater convexity : it is 

 more than a hemisphere ; (2) its extraordinarily symmetrical and 

 prominent aperture, which is funnel-shaped, and described as 

 widening outwards, sometimes crescentic and lateral, at others 

 produced in a circular form on a short neck ; (3) its rough spicular 

 exterior ; (4) its basal flange of attachment, to which Carter appears 

 to attach considerable importance; (5) its very thick shell-wall; and 

 (6) its large size as compared with the young stage of /. diaphana. 



Brady, in his " Synopsis," ** includes Carter's species under 

 Placopsilina as P. varians (Carter), and as a synonym includes 

 P. kingsleyi Siddall.ft He says: " I am not prepared to say w-liat 



* 0. Butschli, iu Bronn's " Klassen und Ordnungen des Thierreichs," 

 edn. 1S89, i. p. 188. 



t C. P. & J. 1862, I.F. p. 67, pi. i. fig. 22 (after Schultze). 



X C. 1870, S. pp. 310 and 321, pi. v. figs. l-f,. 



§ E. 1905, F.B.S. p. 201, pi. xi. figs. 6, 7 ; pi. xiv. figs. 1-3 ; and H-A. & E. 

 1908, etc., S.B. 1909, p. 323. 



II H-A. & E. 1914, F.K.A. pt. 1, p. 371, pi. xxxvi. 



t H-A. & E. 1908, etc. ; S.B. 1909, p. 325, pi. xv. fig. 14. 

 ** B. 1887, S.B.R.F. p. 890. 

 tt S. 1886, F.L.M.B.C. p. 54, pi. i. fig. 1. 



