82 . THE FORAMINIFERA 



Lagena clathrata (PI. II., Fig. 14). — A variety of Z. Orbig- 

 nya?ia ; the surface is marked by parallel striae.* 



We have also found a few specimens which are intermediate 

 between Z. clathrata and Z. castrensis. 



Lagena lagenoides (PI. II., Fig. 2). — Has the wing tubulated. 

 The tubules are in shape like a rose-prickle, springing from a 

 broad base. Each surface of the shell is like an oval or elliptical 

 shield, which overlaps the base of the tubes. The minute circular 

 aperture is in the centre of a narrowly-oval mouth, with beauti- 

 fully convex, revolute contour. Our specimens have short necks, 

 and differ from Z. ornata in not having the wing cellulated. 



Lagena lagenoides, variety tenuistriata (PI. II., Fig. 12); 

 Brady, MSS. — The neck is more produced than in Z. ornata, and 

 form " oblongo ovate." The variety tenuistriata is a Challenger 

 form, finely striate; very rare;t 6 specimens, 



Lagena lagenoides, variety trigono-tenuistriata (PI. III., 

 Fig. 12), is the trigonal form of the last variety. It bears a con- 

 siderable resemblance to that of Lage?ia ornata (Will.), but is dis- 

 tinguished by its striae. 



Lagena bicarinata (PI. II., Fig. 4) J. — This oval form is like 

 the F. RizzcB of Seguenza. It has a median depression between 

 two keels ; aperture small, circular in the centre of a rhomboid 

 mouth. This species is allied to Z. ornata, to which its edge- 

 aspect, as well as its shape and mouth, approach in resemblance. 



Seguenza's Fissurina niarginata, loc. cit., PI. 2, Figs. 27, 28, 

 page 66, is a compressed form, with a thick keel slightly canalicu- 

 late. It approaches the bicarinate form, but we prefer the name 

 given by Terquem § to a more characteristic example. 



Lagena trigono-bicarinata (PI. III., Fig. 9). — Very rare ; 6 

 or 8 specimens. 



Lagena flmbriata (PI. II., Fig. 5); Brady, 1881, Quart. 

 Journ. Mic. Sci., Vol. XXL, N.S., p. 61. — New to British waters; 

 very rare ; three specimens. 



In coanrmation of the views of Parker and Brady, that punc- 



* H. B. Brady says: — "The tropical specimens only differ in having fewer 

 stouter costse." 



t This variety has been found elsewhere on British coasts ; exceedingly rare 

 (J. S. Wright). 



J Seguenza speaks of his Fissurina Rizzce. : — "Margin white and opaque, there- 

 fore distinct from the other portion, which is glassy and transparent " ; and of 

 Fissurina apcra : — " Margin white, keel acute." N.B. — The whiteness of margin 

 in these two species points to the liicida type. 



§ Terquem, Mem. de la Soc. Geol. de France, Ser. 2, Vol. 2, 1882, p. 31, 

 PI. IX., Fig. 24. 



