Manchester Memoirs, Vol. Ixii. (191 7) 59 



117. Lagena striato-punctata, Parker & Jones, var. 



caudata, nov. 



PI. Ill, fig. 12a, b, 



Lagena sulcata war. striato-punctata, Parker & Jones, 1865, Phil. 



Trans., vol. CLV., p. 350, pi. XIII, figs. 25-27. 



This variety differs from the type in having the costse pro- 

 longed backwards beyond the base of the test which is further 

 ornamented by the addition of a central basal spine. Specimens 

 are frequent in Gatherings Nos. 4 and 5, and the type is alto- 

 gether absent. (See ii6a. H-A. & E.) The drawing given 

 here shows the basal spine at its fullest development. 



(This is a very distinctive variety, and occurs with its 

 features still more strongly accentuated in some of the Austra- 

 lian Tertiaries. The costas in some Australian specimens pro- 

 ject as recurved basal claws, approaching L. plumigera Brady.) 



118. Lagena flexicollis, sp. nov. 

 PI. Ill, fig. 11. 



Test elongate, cylindrical, ornamented with about eighteen 

 longitudinal rows of minute perforations; the neck of the test 

 furrowed by three deep grooves; the base of the neck less 

 deeply furrowed by six to nine grooves. Base of test flat, with 

 notched circumference. Length, .38 mm. 



This form is a near ally of L. striato-punctata, showing its 

 relationship by the rows of perforations, and also bv the 

 notching of the base and the furrowing of the lower part of the 

 neck, which are evidently the remains of the costse which orna- 

 ment Parker's & Jones' species. The species is rare, only three 

 examples being found in our collections, these occurring in 

 Gatherings Nos. 6 and 9. 



(The three specimens are all calcite casts, and we have little 

 doubt that they should be referred to L. feildeniana, Brady, the 

 lines of perforation following what have apparently been the 

 depressions between sulci in the original shell, and not perfor- 

 ating the sulci as in L. striato-punctata. The asymetrical 

 position of the neck is a feature of frequent occurrence in this 

 group of the Lagena:. Cf. Sidebottom's figures of L. striato- 

 punctata. (S. 1912 S.W.P. pi. XVI, figs. 7, 8, 10.) ) 



119. Lagena hexagona (Williamson.) 



Entosolenia squamosa, var. hexagona, Williamson, 1848, Ann. 



Mag. Nat. Hist. (2), vol. I, p. 20, pi. II, fig. 23. 

 Lagena hexagona, Brady, 1884, Chall. Rep., p. 472, pi. LVIII, 



figs. 32, 33. 



