322 VERMETID &. 
competition with it are the Trochus magus and Cyprea europea ; 
but the ‘ pullus, when enthroned in a splendidly painted shell, 
surpasses everything we are acquainted with amongst our 
indigena. It is a decided littoral species, at times abundant 
at Exmouth, feeding on the algze of the lowest levels. It has 
always been thought phytophagous, but having examined 
many, we were surprised to find in the stomachs of all a 
number of minute Foraminifera, amongst them the Lobatula 
vulgaris and Textularia oblonga: these objects were whole, 
and did not appear to have been acted on by the tongue, 
which is in this species a powerful organ. It is doubtful 
how the nutriment is extracted ; perhaps the gastric juice may 
ultimately dissolve them. 
Though it is the fashion to admit Phasianella as a Trochi- 
dan, from having on the upper lobe vibracula, we doubt the 
propriety of this arrangement: first, because it has not the 
circular operculum ; secondly, the sexes are distinct; thirdly, 
it has the foot and quality of progression of the Littorine, to 
which genus I think it has more analogy than to Trochus ; at 
any rate it is a transition form; and as Trochus, from its pro- 
bable hermaphroditism, will now precede all the Holostomata, 
so Phasianella will follow it and its associates with circular 
multispiral opercula, Cecum and Turritella,—also probable 
hermaphrodites. 
SCISSURELLA, D’Orbigny. 
S. crispata, Fleming. 
S. erispata, Brit. Moll. 1. p. 544, pl. 63. f. 6. 
VERMETID A, nobis. 
This new family, agreeably to my method of classification, 
is introduced to receive the genus Cecum; and further ob- 
servations have led me to relieve the British list of the Turri- 
telide, by a transfer of its single genus, Tuwrritella, to this 
family ; which genera, from their close affinity to the hitherto 
