1921-22.] Myriapods from Mesopotamia and N.W. Persia. 71 
anal valves, which are not prominent, strongly convex, and completely 
destitute of marginal pads. 
First pair of legs uncus-like ; the telopodite formed of two or three 
more or less distinct joints. The following pairs with a complementary 
coxal ring and soles below the fourth and the fifth joint. 
Peltogonapods narrowed at the base, abruptly and largely widened 
before the middle, with rounded apex (fig. 15). The apical tubercles 
of the posterior surface are quadrangular, subequal in size and shape, and 
placed side by side on the same level. The reflexed thickenings of the 
inner margin reach as high as the second third of the total length of the 
organ. 
Gonapods (fig. 16) gradually tapering apically, provided with anterior 
and posterior basal expansions (the latter wider than the former), and 
divided almost from the middle of their length. The anterior division, 
the mesomerite (M.), is gradually sharpened and closely laid against the 
posterior division, or solenomerite (S.). The latter is a concave lamella 
(tig. 17), in which a groove is seen to wind its way down almost to the ^ 
bottom of the gonapod. Apically the groove widens into a short funnel, 
the anterior margin of which thins out into a short, sharp spine. 
^ : Mandibular stipe narrowed anteriorly. Collum somewhat longer 
than in the male. Second segment as large as the following segments, 
much larger than the collum, so that it appears swollen ventrally ; its 
pleural lobes end in sharp angles. 
Sternite of second pair of legs short, raised between the insertions of 
the tracheal stalks (s., fig. 18). Tracheal stalks (t.) not branched, slender. 
Basal expansions of coxm of second pair very low and poorly developed ; 
the coxa itself moderately widened distally and without complementary 
ring. 
Vulvar invaginations (i.) distant from each other, being just deep 
enough to conceal the vulvm. When at rest, the vulvm are disposed so as 
to have the mound facing backwards and dorsally ; consequently the 
aperture of the invagination is closed by the distal part of the operculum. 
The latter (o., fig. 19) is much higher than the mound; the median part 
of its upper margin is bent backwards, partly overlapping the ridge ; 
therefore the summit of the operculum appears excised, with acutely 
produced angles. On a level with the outer angle are several (6 or 7) 
macrochaetae. 
The mound (M., fig. 19) is poorly chitinised, rounded backwards, 
strongly asymmetrical ; the outer valve is much lower than the inner; both 
are tipped with inconspicuous lamellae and strewn with macrochaetae along 
