Manchester Memoirs, Vol. Ixii. (191 7) 55 



FAMILY CHILOSTOMELLIM:. 



Genus Chilostomella, Reuss. 

 106. Chilostomella ovoidea, Reuss. 



Chilostomella ovoidea, Reuss, 1850, Denkschr. k. Ak. Wiss. 



Wien, vol. I, p. 380, pi. XLVIII, fig. 12. 

 C. ovoidea, Brady, 1884, Chall. Rep., p. 436, pi. LV, figs. 12-23. 



Rare, but seemingly persistent from top to bottom of the 

 Marls. 



FAMILY LAGENIMi. 



SUB-FAMILY LAGENIN^E. 



Genus Lagena, Walker & Boys. 

 107. Lagena l^evis, (Montagu.) 



V ermicuhim Iceve, Montagu, 1803, Testae. Brit., p. 524. 

 Lagena Icevis, Brady, 1884, Chall. Rep., p. 455, pi. LVI, figs. 

 7-14, and 30. 



Frequent, generally distributed, and very variable in form. 



(The majority of the specimens are of the globular type 

 with produced necks, but inasmuch as nearly all the specimens 

 are represented by calcite casts, their specific identity in many 

 cases is more or less uncertain.) 



108. Lagena globosa, (Montagu.) 



Serpula (Lagena) Icevis globosa, Walker & Boys, 1784, Test. 



Min. Rar., etc., p. 3, pi. I, fig. 8. 

 V ermiculum globosum, Montagu, 1803, Testae. Brit., p. 523. 

 Lagena globosa, Brady, 1884, Chall. Rep., p. 452, pi. LVI, 



figs. 1-3. 



Frequent, and generally distributed. The finest specimens 

 are nearly all provided with an entosolenian tube, and a pro- 

 jecting basal tube at the other extremity of the test. As regards 

 the specimens with radiate apertures it must at all times be 

 very difficult if not impossible to say whether such tests are to 

 be referred to Lagena, or are the primordial segments of other 

 genera of the same family. In other words, to say whether the 

 shell has arrived at its adult condition, or whether it will not 

 add to itself additional chambers. 



(On one of the type slides is an unnamed specimen, a 

 calcite cast which was probably assigned by Halkyard to this 

 species, but which possessing a large apical aperture and 



