90 MR. A. W. WATERS ON 
the determination of S. Peachii and S. ventricosa, and do not 
know of any characters by which they can be saticfactorily 
distinguished. 
An examination of the specimen from Franz-Josef Land which 
Ridley called Mlucronella ventricosa var. connectens, shows the 
pore-chambers distinctly, and these Ridley termed fenestra, but 
they do not furnish any ground for separation as a variety. 
The S. ventricosa has been found from various Arctic localities, 
and is common from the British and French coasts, and Manzoni 
records it from the Mediterranean. 
51. Smrrrra Lanpsgorovit, Johnst., var. (PI. 12. fig. 7.) 
There is a small encrusting specimen from off Elmwood, 
18 fathoms, which seeems to be a variety of S. Landsborovii. 
Above the distal border of the oral aperture there is a projecting 
hood to most zocecia, and in the ovicelligerous zocecia this is 
attached to and extends below the ovicell. The surface of the 
zovecium 1s punctured with large pores. 
There has been much confusion concerning S. Landsborovit, 
especially in the Arctic regions, as no doubt several distinct 
species were alluded to by Smitt under his Escharella Landsborovit, 
and in Busk’s British Museum catalogue a mistake was made 
between S. reticulata, MacG., and S. Landsborovii. 
The type occurs off the British seas, in the Mediterranean, 
Australia, New Zealand; and Ortmann gives it as from Japan. 
Smittia reticulata, MacG., S. reticulo-punctata, Hincks, 8. 
trispinosa, Johnst., S. rigida, Lorenz, S. abyssicola, Norm., have 
been mentioned from Arctic localities. 
52. P PHYLACTELLA LABIATA (Smitt), (Pl. 12. figs. 3 & 4.) 
Discopora coccinea, forma labiata, Smitt, “ Krit. Fort.” 1867, pp. 27 & 
175, pl. xxvii. fie. 176. 
Discopora labiata, Smitt, op. cit. 1878, p. 23. 
Mucronella labiata, Levinsen, Bry. Kara-Havet, p. 325; Bidenkap, 
Bry. von Ost-Spitzbergen, p. 610. 
Phylactella grandis, Hincks, Ann. Mag. Nat. Hist. ser. 5, vol. vi. p. 280, 
pl. xv. figs. 4, 5. 
Although probably Phylactella, which is so largely based upon 
peristomial characters, will not be found to be a satisfactory 
genus as now understood, it has seemed better to leave P. labiata 
here rather than place it under Smttia. 
The peristome in front is much raised and entire, but behind 
it-is nut raised, and there there are four long spines. ‘There is a 
