rgt0.| N. ANNANDALE: Barnacles of the subgenus Smilium. 151 
B. Peduncular plates in the form of 
flat, transversely oval discs on 
the surface of the membrane, 
never completely surrounding 
the peduncle - .. S. bengalense. 
II. Length of capitulum of hermaphrodite 
much more than twice the breadth. 
Peduncular plates in the form of 
imbricating, upwardly directed 
scales .. t .. S. acutum. 
Scalpellum (Smilium) squamuliferum Weltner. 
S. squamuliferum, Weltner, Sitz-Ber. naturf. Freunde, 1894, p. 80, 
figs.; Annandale, Illustr. Zool. ‘‘ Investigator,’ Crust. (En- 
tom.), pl. ii, fig. 4 (1907), and pl. iii, figs. 4—6 (1908). 
CAPITULUM compressed, irregularly ovoid, the carinal margin 
being more strongly arched than the occludent, which, except for 
the projecting rostrum, is nearly straight and slopes outwards 
from above. Valves 15, moderately stout, white, imbricate, feebly 
striated vertically, with the lines of growth well marked, covered 
by a thin but opaque brownish, minutely hairy membrane, the 
tips projecting upwards. Carina simply and not very strongly 
arched ; its dorsum convex ; its sides concave (especially above) ; 
with strong outer and inner ridges; the umbo apical, situated well 
above the centre of the terga. Swbcarina triangular, not very 
prominent, variable in size, often small and as a rule entirely 
concealed beneath the membrane. Rostrum large, narrowly tri 
angular, curved and prominent, strongly ridged in front. Terga 
narrowly rhomboidal, pointed above, with the main axis slanting 
outwards from the carina; the sides forming the upper angle 
straight, shorter than those forming the lower angle, which are 
arched. Scuta subequal to the terga, which they resemble in 
shape; their main axis vertical; the upper part of each ‘valve 
slightly retroverted ; the occludent margin longer than any of the 
other sides. Upper latera resembling the scuta but of as a rule 
about half the size, variable, however, in this respect. mnframe- 
dian, carinal and scutal latera triangular, more or less completely 
concealed beneath the membrane; the inframedian latera much 
larger than the others 
PEDUNCLE variable in length, covered with complete undulat- 
ing rings of calcareous plates embedded in thick membrane. 
These plates take, individually, the form of minute rods embed- 
ded more or less obliquely in the membrane ; the outer extremity 
is slightly inflated and bears a small pit. Sometimes they are 
almost completely concealed in the membrane and the rings they 
form appear to consist merely of raised ridges on the surface of 
the peduncle. 
Crreti, ete. Cirri delicate, not very long or strongly curved, 
densely fringed on the anterior margin but with the posterior 
