44 PORAMINIFERA OF THE CRAG. 



traversed by pseudopodial tubes, with a somewhat radial arrangement, often giving the 

 margin the appearance sometimes of being more or less regular plicated. 

 Length 5!5th inch. 



In fact, we have in this case one of the subvarieties of Lagena marginata mentioned 

 in ' Phil. Trans.,' 1865, p. 335, and alluded to above in our account of the last-named 

 form. Among the several modifications of the type, this presents one with the radiating 

 canals visible only at the margin. Prof. Williamson's Entosolenia marginata, var. ornata, 

 especially possesses the subtypical character above mentioned ; and his E. marginata, 

 var. lagenoides, as represented by the fig. 26 in his ' Monograph ' (badly copied in Prof. 

 Reuss's 'Monograph of the Lagenida,' 1862, pi. 2, fig. 27, and misnamed " ajjj^endi- 

 cidata" in the plate), has this character plain enough, though not so symmetrically perfect 

 as in our specimen from the Crag. Prof. Seguenza has recorded some beautiful spe- 

 cimens ; his Fissiirina trapezoides is almost identically the same as Williamson's fig. 26 ; 

 but his F. radiafa and F. Eeussiana are beautiful developments of the same form ; 

 indeed, we regret that the exigencies of zoological nomenclature debar us from keeping 

 our highly esteemed German friend's name permanently associated with so elegant a Lagena. 



L. ornata, with its neatly radiate margin, does not seem to be a very rare form among 

 other Lagena (Davis' Straits and British coast, recent ; Sicily, fossil) ; besides two or 

 three small specimens, we have from the Crag of Sutton one at least as beautiful as 

 Seguenza's L. Beussiana. 



10. Lagena apiculata, Beuss. Plate. I, fig. 27. 



OoLiNA APICULATA, Rmss, 18.50. Haiding. Nat. Abhandl., vol. iv, p. 22, pi. 1, fig. 1. 

 Lagena — Id., 1862. Sitz. Akad. Wieu., vol. xlvi, p. 319, pi. 1, figs. 



4—8, 10, 11. 

 FissuRiNA ACUTA, Id. lb., p. .340, pi. 7, figs. 40, 41. 



OvuLiNA CAUDIGERA, Seguetisa, 1862. Foram. Mon. Mioc. Mess., p. 39, pi. 1, fig. 3. 



— PEKFOBATA, Id. lb., p. 40, pi. 1, fig. 4. 



Amphorina globosa, Id. lb., p. 50, pi. 1, fig. 31. 



TENUICALCAR, Id. lb., fig. 32. 



— ELONGATA, Id. lb., fig. 34. 



Lagena sulcata, var. (Entosolenia) apiculata et caudata, P. and /., 186.'). Phil. 



Trans., vol. civ, p. 358. 



Characters. — Shell oval, subspherical, or flask-shaped ; smooth, with the base either 

 merely apiculate, or drawn out into a tubular prolongation. 

 Length yggth inch and upwards. 



Similar forms are often ornamented with striae and costulse, such as L. caudata, D'Orb. ; 

 and the two groups together, as we have already noticed (p. 35), when referring to our 

 scheme of the division of the Lagena, may be referred to under that name, as an intermediate 



