106 l:xplai\ t atio> t of plate 



2. P. sxiuato-puncxata, F. Sf M. Polystoinella umbilicatula; 

 and P. umbilicatula, var. incerta. Pec. For. Gt. Br. 

 PI. Ill, figs. 81, 82, 82a 



Common. Small clear-shelled specimens very abundant in the 

 brackish-water pools of Hylton Dene, near Sunderland ; also in 

 brackish water near the mouths of the Wansbeck and Coquet. 



2, NONIONINA, D'Orb. 



1. N. tukgida, Will. Potalina turgida. Rec. For. Gt. Br. 



PI. IV, figs. 95-97. 



Berwick Bay, 30 to 40 fathoms, rare. Off Holy Island, rare. 



2. N. umbilicatoxa, Montagu. Nonionina Barleeana. Rec. 



Por. Gt. Br. PI. IV, figs. 68, 69. 



Durham coast, 40 to 48 fathoms, rare. 



3. N. depressula, W. Sf J. Nonionina crassula (page 33); 1ST. 



umbilicatula (page 97). Rec, Por. Gt, Br. PI. IV, figs 

 70, 71. 



Found sparingly both in littoral sands and in material dredged 

 from various portions of the coast ; common in brackish water at 

 the mouth of the "Wansbeck. 



4. N. Scapha, F. 8f M. [PI. XII, figs. 10, a.b.] 



Two beautiful and well marked specimens of this form, its 

 first occurrence on the British coast, were collected from the 

 sands dredged in 40 to 48 fathoms off Seaham. It is one of the 

 Norwegian species figured by Messrs. Parker and Jones as Wonio- 

 nina communis, D'Orb. (Ann. Mag. Nat. Hist,, 2nd Series, vol. 

 XIX, p. 287) ; but it is also found in the seas of temperate and 

 tropical regions, and occurs in a fossil condition in many Tertiary 

 deposits. 



EXPLANATION OF PLATE XII. 



Fig. 1, Spii'oloculina excavata, D'Orb. Magnified 25 diameters. 



a. Side view. 



b. Edge view. 



Fig. 2. Quinqueloculina subrotunda, Montagu. Magnified 50 diameters 



