the Cirripede Genus Stramentum, 67 
Anton Fritsch (1889) described and figured aseries of twelve 
specimens, which he described as varieties of L. pulchella, 
namely L. pulchella, var. gigas, and L. pulchella, var,minor. 
One of them, L. pulchella, var. gigas, had already been 
described by Fritsch (1877) as a separate species, The 
specimens occurred in the Turonian (Middle Chalk) of 
Weissenberg, Bohemia, and were found attached to ex- 
amples of the ammonites, Ammonites peramplus and A. wool- 
gari, no less than seven individuals being attached to a single 
shell of the latter species. 
In the same year (1889) J. F. Whiteaves described a new 
species under the name L. canadensis. It was founded on 
a very fine specimen collected by Mr. J. B. Tyrrell in the 
Cretaceous (Fort Benton group), at South Duck iRiver, in 
Township 34, Range 23 W., Manitoba. Other specimens 
occurred, for the author stated that ‘‘ A few isolated capitular 
plates of Z. canadensis were also collected by Mr. Tyrrell in 
1887, at the Vermilion River, in Township 24, Range 20 W., 
from Fort Benton Group, or lower part of the series.” 
S. W. Williston (1897) followed by describing a remark- 
ably complete specimen from the Cretaceous (Niobrara 
group) of Kansas, under the name Pollicipes hawortht. 
That specimen was subsequently described by W. N. Logai 
(1897), and together with a second species, Stramentum 
tabulatum, was included in a new genus Stramentum. 
In 1908 Dr. H. Woodward established the species 
L. darwini on three specimens obtained by Mr. G. Hi. Dibley 
in the Turonian (Middle Chalk) Rhynchonella cuvieri-zone 
of Cuxton, near Rochester, Kent, the same locality from 
which came the holotype of L. pulchella. These three speci- 
mens were attached to the cast of an ammonite, Puachy- 
discus peramplus, and are now in the Geological Department 
of the British Museum, registered I. 9130. 
A further species, LZ. ewpansa, Withers (1911), has been 
described, and the species was founded on two left and three 
right scutal valves from the Upper Senonian, Actinucamaxr 
guadratus-zone, Hast Harnham, near Salisbury, Wilts. 
Apart from these isolated valves it can be proved that Lori- 
cula occurs in the Senonian of England, for there is in the 
Geological Department of the British Museum an example 
of an oyster that had grown on a Loricula, avd has thus 
preserved on its surface a perfect imprint of the greater part 
of a peduncle. This specimen came from the Senonian 
(Upper Chalk) of Norwich (Bayfield Coil.), and is registered 
42,012. 
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