265 
other cirriped pupae. Behind the cirri a short penis is seen term- 
inating in two long setae. 
In the material also some few younger ones were found. The 
smallest specimen (Fig. 25) has already passed the cypris stage, 
but only its primordial valves are developed; these are of a porous 
structure as in other genera; the scuta are broadly triangular, the 
terga have a strongly arched carinal margin and attain the shape 
of a phrygian cap, owing to the projecting apex. The greater upper 
part of the valves is covered with small hairs, and a similar, hairy 
Figs. 24 and 25. Ibla pygmæa from 38° 12’ S., 149° 40 E. 
Fig. 24. Two complemental males, [x 52]. — Fig. 25. a young specimen with only 
primordial, porous valves, b somewhat older specimen. [X 52], 
coat covers the area where a carinal plate might be expected. The 
peduncle is punctuated, and makes an observation of a rudiment- 
ary carina almost impossible; in certain oblique light projections 
sometimes a special area seems to indicate the presence of a rud- 
imentary carinal valve, but it could not be made out with absolute 
certainty. The same holds good in some other, a little larger spec- 
imens; but it may also be due to an optical illusion. 
In a somewhat older specimen the embryonic hairs are only 
kept on top of the terga, and have disappeared in the carinal 
area; on the other hånd, the stouter peduncular hairs commence 
to appear, and the capitulum plates here show the transition to the 
adult shape. 
The primordial terga generally are not traceable in the adult, 
whereas the primordial scutum always covers the apical umbo like 
a somewhat broad nail. 
