REPORT OF THE DIRECTOR 1918 169 



sion was more likely to have been simple as shown in many published 

 figures of this species, such as the excellent wood cuts (figs. 3a, 

 b; p. 17) of the Triassic forms found by Vadasz in Bakony. 

 There is of course a possibility that this type, shown in cross section, 

 isLagena marginata since there is no method of determin- 

 ing the flattening of the margin in any cross section longitudinally 

 made, although this would at once be apparent in transverse view. 

 Because this species has had such a long history, and since the 

 shape is the same as the type figures, we have little hesitation in 

 referring these two specimens to the above species. 



The geographical distribution of this species is worldwide in 

 existing oceans, even in Arctic waters, and it is also known at great 

 depths. Many synonyms have been given to this species, perhaps 

 the most common being Lagena vulgaris Williamson (Rec. 

 Foram. Great Brit., p. 4, pi. i, fig. 5) and Phialina ovata 

 Seguenza (from Italy). Vadasz mentions the frequent occurrence 

 of the species in the Protrachyceras Reitzi-zone of the Trias near 

 Felsoors as well as from the Estheria-marl of Csopak. Lagena 

 1 a e V i s appears therefore • to have a geological range equal to 

 Lagena globosa (Montagu) . 



We judge from the illustrations given by Brady (Notes on Some 

 Silurian Lagenae, Geol. Mag., n. s., Dec. iii, 1888, 5: 481-84, pi. xiii) 

 that the Wenlock forms were coarser and larger than the more 

 typical, minute specimens we recognize in the Bonaventure chert. 



Lagena marginata (Walker & Boys) 



Plate 3, figures 12, 13 



Serpula marginata, Walker & Boys, 1784, Test. Min., p. 2, pi. i, fig. 7 

 Lagena sulcata var. marginata, Parker & Jones, 1865, Phil. 

 Trans., 155: 355, pi. xiii, figs. 42-44, pi. xvi, fig. 12 



There is seen on slide 3 an oval Lagena with wide margin identical 

 with L. marginata (Walker & Boys) which seems to belong 

 to this species. We have no means of determining, however, 

 whether this form is compressed, as a transverse section would be 

 necessary to reveal this feature. The aperture appears as a depres- 

 sion centrally located, but the shell is somewhat more spherical 

 than typfical L. marginata forms. 



In the Challenger monograph Brady reports this cosmopolitan 

 type from every sea and from most northern latitude to the 

 Antarctic ice fields. The depth also varies from shoal water to 

 beyond 3000 fathoms. Geologically, the species is known in the 



