Manchester Memoirs, Vol. Ixii. (191 7) 61 



123. Lagena marginata (Walker & Boys.) 



Scrpula {Lagena) marginata, Walker & Boys, 1784, Test. Min., 



p. 2, pi. I, fig-- 7. 

 Lagena marginata, Brady, 1884, Chall. Rep., p. 476, pi. LIX, 



figs. 21-23. 



Frequent and typical but not of large dimensions. 



(A large proportion of the specimens are of the well marked 

 variety Fissurina carinata Reuss figured by von Schlicht (R. 

 1870 F.S.P. p. 469 and S. 1870 F.S.P. pi. V, figs. 1-3.) and 

 named by Silvestri Fissurina schlichti. Included on the same 

 slide are a few specimens which should be referred to L. orbig- 

 nyana (Seguenza) and L. fasciata (Egger.) ) 



« 

 124. Lagena marginata, var. in^quilateralis, J. Wright. 



Lagena marginata, var. incequilateralis, J. Wright, 1886, Proc. 

 Belfast C Nat. Field Club, 1884-5. A PP- 1886, p. 321, pi. 

 XXVI, figs. 10a, b, c. 



Extremely rare, only one specimen found. 



(The single specimen is of the weakest character and 

 hardly worth separating.) 



125. Lagena radiato-marginata. Parker & Jones. 



Lagena radiato-marginata, Parker & Jones, 1865, Phil. Trans., 



p. 355, pi. XVIII, figs. 3a, b. 

 L. radiato-marginata, Brady, 1884, Chall. Rep., p. 481, pi. 



LX[, figs. 8, 9. 



Very rare, three specimens found in Gathering No. 3. 

 These examples ought rather to be classed as a variety of 

 L. orbignyana than one of L. marginata, seeing that besides 

 the marginal keel they also possess two narrower parallel ones. 



(The specimens cannot by any latitude of identification be 

 referred to Parker & Jones' species which is a most character- 

 istic type. They are merely a variety of L. orbignyana char- 

 acterized by the existence of radiating grooves extending from 

 a central boss of clear shell substance, in other words, an ornate 

 modification of Wright's variety walleriana (W. 1891. S.W.I, 

 p. 481, pi. XX, fig. 8.). The little test figured bv Sidebottom 

 (S. 1912 L.S.P. p. 417, pi. XIX, fig. 20) L. orbignyana var. 

 curvicostata is identical in the character of the superficial mark- 

 ings, but differs in the recurving of the carina? at the base. In 

 the Biarritz specimens the carina is continuous as in typical 

 L. orbignyana.) 



