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Psyche 
[June 
a detailed description and as this is a conspicuous feature, 
one may consider them as lacking; (2) the armature of the 
cephaloprothorax is described chiefly on pages 466-467. Most 
of page 467 is taken up with the description of a structure 
which Nicolet called a tectum or head-roof. (3) The noto- 
gaster (last line of page 468) is described as oval, vaulted 
(like the carapace of a turtle) with rugose, shagreened 
surface (Robineau-Desvoidy called it granular). 
Fortunately there is but one group of apterogasterine 
Oribatids to which this description applies, namely, that 
called Cepheus by Nicolet (not Koch) . A more detailed 
comparison of the description of Lucas and Demary, with 
the species figured by Nicolet and by Michael under the 
names Cepheus vulgaris , C. tegeocranus and C. latus will 
make this identity the more certain. 
In describing the cephaloprothorax these authors first 
describe (p. 466) the structure of the portion below the 
tectum. Of this they say : “Four main pieces form this head, 
three latero-superior and one inferior. Two of the latero- 
superior pieces are thin, transversely flattened, and arti- 
culate posteriorly with the first piece which forms the 
thorax or rather the cephalothorax ; they are directed for- 
ward and approximate each other so as to circumscribe a 
triangular space which encloses the third medio-superior 
piece. [These two latero-superior pieces are thus the gense 
of Michael]. This latter articulates behind with the median 
and anterior part of that kind of shield which covers over 
the body [notogaster] [i. e. it is the rostrum and dorso- 
vertex of Michael]. Laterally it merges with the projecting 
blades or ears which we have already indicated [preceding 
paragraph, i. e. lamellae] ; as it proceeds anteriorly they 
gradually narrow or turn inward, and terminate at the 
anterior part of the two lateral plates [genae], but without 
merging intimately with them, so that one distinguishes at 
their ends two little grooves separating three little tubercles 
called the upper lip. [This condition is clearly indicated in 
Michael’s 1883 volume, pi. 16, fig. 9: C. tegeocranus , where 
a is the medio-lateral piece separated from the triangular 
lateral piece by a slender tectopedial ridge, also in Nicolet, 
pi. 7 (31), fig. 8c where the rostral bristle is shown on a 
