247 
licipes Danvini Hutton. This question cannot be settled from liter- 
ature. — On the other hånd, the reduction of the lower latera to 
flat scales would give us a Lithotrya, and at first sight I was in- 
clined to refer some of the specimens to this genus. 
The occurrence of complementary males in Protomitella is a 
primitive feature in comparison with Mitella — hence the name 
—, and strengthens the evidence of the phylogeny of Mitella — 
arrived at on basis of the skeletonal development (comp. Broch 
1921). The scanty occurrence of males may be due to the time 
of the year; but it may also possibly be taken as a proof of the 
male being about to disappear in the genus. 
Protomitella paradoxa n. sp. 
Slipper Island, New Zealand; coast at low tide. 20/XII 14. Three spec¬ 
imens. 
Plimmerton, New Zealand; on the coast. 15/1 15. Three specimens. 
Carina, terga, scuta, and rostrum well developed, generally also 
an upper latus, although this plate is often almost hidden behind 
the lower, almost digitiform latera; among these latter a subcarina is 
often rather prominent, a subrostrum not. The peduncle is armed 
with densely crowded, calcified, chitinous spines. — Males with 
carina, terga, scuta, and rostrum; irregularly occurring latera some- 
times occur. 
The capitulum exhibits a very variable aspect (Fig. 13) owing 
to the enormous variation in shape and development of the capi¬ 
tulum plates. It is covered by a dirty, yellowish-brown, thick, and 
hairless cuticle which obscures the delineations of the lower parts 
of the thick plates, and often almost hides the upper latus. 
The carina is straight or feebly arched, with the apical part 
free: the plate may be as broad at the apex as at the base, and 
is ornated with prominent lines of growth. The carina may be the 
largest plate of the capitulum or it only attains two thirds of the 
length of the terga. 
The tergum is more triangular or quadrangular, the apex 
being pointed or square; it is the largest plate of the capitulum, 
although it is sometimes surpassed in length by the narrower 
carina. The growth lines are also here prominent as in all plates 
of the capitulum. 
