ON THE FOSSIL PHYLLOPODA OF THE PALZOZOIC ROCKS. 359 
2. Orozoe has the cephalothoracic nodes very strong, and a great blunt 
spine projecting from the upper part of the posterior moiety of the valve. 
3. Callizoe is very distinct from the foregoing. Itis delicately shaped, 
long-half-egg-shaped, with straight back, and sometimes a slight in- 
flection of the antero-ventral margin, near which the cephalothoracic 
nodes are placed, instead of dorsally as in Aristozoe and Orozoe. The 
ventral rim distinct and regular; the ornament of the valves delicate, 
longitudinal, inosculating, raised lines, with an intermediate minute 
punctation (fig. 7). 
4, Barrande’s Nothozoe is illustrated by seven figures of specimens, 
mostly ovate or oval, with plain surface; somewhat like Ceratiocaris, 
especially fig. 1, pl. 27. The ventral rim, however, is apparently too 
strong for that genus in figs. 1 and 2. The specimens measure 28 x 16, 
40 x 25, 50 x 30, and 65 x 40 mm. 
32. ARISTOZOE REGINA, Barrande, and its abdominal appendages. 
M. Ottomar Novak, the keeper of the Barrande Collection at Prague, 
has lately made some valuable observations on some of the specimens - 
collected by M. Barrande and referred by him to Aristozoe, Bactropus, 
and Ceratiocaris debilis. (‘ Remarques sur le genre Aristozoe, Barrande.’ 
‘ Sitzungsb. k. béhm. Gesellsch. Wissensch.’ 1885.) 
M. O. Novak has with great acumen discovered that such a telson as is 
described for Ceratiocaris debilis by Barrande will accurately fit, in all 
respects, the distal end of one of the fossil abdominal segments, figured 
and named Bactrepus longipes by Barrande (‘ Sil. Syst. Bohéme,’ vol. i. 
Suppl. 1872, p. 581, pl. 21, figs. 1-22). Further, he has found that large 
numbers of individuals of the Bactropus, the Ceratiocarid telson, and 
Aristozoe regina, Barr., are associated in the same white limestone of the 
‘f 2’ band over a wide area in Bohemia. Hence he has reason to regard 
the carapace, the abdominal segment, and the telson as all belonging to 
one animal. This seems, indeed, to be very likely ; but at the same time 
there are probably more than one species and genus indicated by the 
telsons referred to C0. debilis. One, at least (pl. 18, fig. 24), if correctly 
determined, has a longitudinal linear ornament, not agreeing with that 
of Bactropus longipes, which is transverse (pl. 21, fig. 22; and Novak, 
op. cit. pl. 1, figs. 21-23). M. Barrande found also a characteristic 
Ceratiocarid ‘ rostrum’ with his C. debilis (pl. 26, fig. 18). M. Novak 
indicates that the structure of the basal joint of the telson would 
accommodate the hingement of two lateral stylets, so that Aristozoe 
would have had the trifid caudal appendage usual in the Phyllocarida. 
It yet remains to be shown how many were the abdominal segments of 
which the curious, cylindrical, tubular Buctropus was one, and what pro- 
portion this long ultimate segment bore to the others. M. Novak refers 
to it as ‘a part of the post-abdomen (several segments? coalesced)’ ; 
farther research will probably help in its elucidation. 
33. ECHINOCARIS AND ITs ALLIES. 
In the ‘ Geological Magazine,’ dec. 3, vol. i. 1884, pp. 393-396, we 
published some ‘ Notes on Phyllopodiform Crustaceans referable to the 
Genus Ecutnovaris from the Paleozoic Rocks.’ In this we mentioned in 
detail the evidence supplied by the labours of Dr. James Hall and Prof. 
