Manchester Memoirs, Vol. I. (1906), No. 5. 7 



pi. 7, fig. 11), two curved bands appear on each side of the 

 shell. In L. faba, Balkwill and Millett ('84, p. 81, pi. 2, 

 fig. 10), these bands are slightly raised, whilst they 

 become costae in L. quadricostulata, Reuss, L. fasciata, 

 Egger, and L. meyeriana. Chapman ('94, p. 706, pi. 34, 

 fig. 7). These bands may or may not unite at the base 

 of the shell ; Dr. Egger's examples show both conditions, 

 whilst in the only known specimen of L. meyeriana, the 

 costae, although continuous, are recurved, and form a 

 sinus at the aboral extremity." 



The peculiarity of the Delos examples is that the 

 grooves, or shallow sulci, have their edges raised above 

 the body of the shell. 



In the varieties figs. 14, 15, 16, 17, this feature is well 

 marked, whilst in fig. 13 there is a doubt as to its being 

 present, owing to the fineness of the markings, and I 

 have been unable to satisfy myself on this point. In 

 only two or three cases are the grooves continuous at 

 the base of the shell. This range, with few exceptions, 

 has a short entosolenian tube which is straight, and 

 therefore not attached to either face of the test. This 

 tube is often split at the end, instead of having the well- 

 known trumpet orifice. 



The Delos forms are evidently closely allied to 

 L. annectens, Burrows and Holland, and future research 

 may connect them with L. alveolata, Brady. Rare to 

 very rare. Only the forms represented by figs. 14, 15, 

 16, occur at Palermo. 



Lagena fasciata, Egger, var. carinata, nov. (PL i., 



fig- 1;)- 



This variation has a central keel ; the test is very 

 finely pitted all over, and so has not the same transparency 

 as we find in the other varieties. A short, stout, straight 



