CIRRIPEDES IN THE NORWICH MUSEUM. 
313 
Scutum. Darwin says (op. eit., p. 28) — “ In Mr. Fitch’s 
Collection there are three left-hand valves of a Scalpellum, 
which, from their size and smoothness, I have no doubt 
belonged to this species, and from their thinness, probably 
to the variety of carina considered as typical under the 
simple name of S. maximum These are now registered as 
follows : — 
Scutum (figd., p. 28, pi. ii., fig. 8) [2139] 
2 Scuta [2140] 
The following scuta have been readily identified as those 
figured by Darwin, since they are broken exactly as is 
indicated in the figures. 
Right Scutum, Var. II. Probably referable to S. maxi- 
mum , var. sulcatum (figd , p. 29, 
pi. ii., fig. 9) 1 2147] 
Left Scutum, Var. III. (figd., p. 29, pi. ii., fig. 10) [2144] 
Tergum. Darwin says (op. cit., p. 30) there are eight 
examples of this valve in Mr. Fitch’s Collection from Norwich. 
These have been identified and are registered as follows : — 
Var. I. Left tergum. Probably belongs to the typical 
S. maximum (figd., p. 30, pi. ii., 
fig. 5) [2141] 
Var. II. Right tergum. (figd., p. 30, pi. ii, fig. 6) [2145] 
Var. III. Right tergum. Probably belongs to var. cylin- 
draceum (figd., p. 31, pi. ii., 
fig- 7) [2142] 
5 other terga [2143, 2143a, 2150, two associated valves 
2150a, 2158b]. 
6. Scalpellum maximum , var. sulcatum Darwin 
(J. de C. Sowerbv as species). 6 * 8 
8. J. de C. Sowerby (1829, Min. Conch, Vol. VI., p. 221, pi. 606, 
figs. 1, 2, 7) figured three detached valves under the name Pollicipes 
sulca/us. Darwin (1851, Pal. Soc. Monogr. Lepadidas, pp. 27, 34) fixed 
on the carina (Sowerby’s fig. 2) as the type of the species, but 
referred the species thus defined to Scalpellum as a variety of 
