EUGLTPHA MUCUONATA. 23 



circular bordered by a single ro\v of 6 to 8 denticulated 

 scales ; plasma normal. 



Length (without spine) 100-140 ;u,; diameter 32- 

 60 /A ; aperture 15-20 yu, ; spine 12-44 [x in length. 



Habitat.— Submerged sphagnum. 



England. — Hawkeshead, Lancashire (West). 



This species was first recorded from New Jersey, 

 U.S.A. The size of the individual recorded from 

 England by West was 123 /x in length and 60 /x, in 

 breadth; this breadth is greater than observed by 

 Leidy or myself in United States specimens. 



Fig. 116. — Spines of Huglypha mucronata. x 1000. a, narrow view ; 

 b, broad view ; c, double spiue. 



The terminal spine is usually single but may be 

 double ; it may be straight or slightly curved, inclined 

 or coincident with the axis of the test; a single 

 straight spine about 23 [x in length is the typical form 

 at Lakehurst, N.J. 



In the accompanying figures (fig. 116 a~c) is shown 

 how the spines originate from the terminal scale or 

 scales of the test ; the apex is completely closed by 

 the accurate fitting together of the adjoining scales 

 and by a transverse diaphragm placed across the apex 

 at the base of the spine ; the spines are oval in section 

 at the base, about 2 /x in breadth and 1'25 /x in thick- 

 ness ; the aperture scales are rounded with three 

 raised blunt denticulations on each. 



No active individuals were observed by me nor does 



