65 
921 - 22 .] Myriapods from Mesopotamia and N.W. Persia. 
with strong, regular, and dense sulci running through to the posterior 
margin, which is neither fringed nor pilose. The pores open in the suture 
itself ; their distance from the posterior margin covers 8 interspaces (on the 
10th, 15th, 40th segment) to (on 62nd). 
Seventh segment (of male) with 
traces of dorso-median suture (x., fig. 8) 
and a thick ventral duplicature (d.). 
Last segment triangularly pro- 
duced into a long, straight, thick pro- 
cess, laterally depressed at the base, 
the apex of which decidedly overlaps 
the anal valves. No setse were ob- 
served. Anal valves obliquely trun- 
cate, not prominent, with rounded 
margins and fine setae spread all over 
their surface. Anal scale large, deeply 
excised, with a sharp angle on each 
side of the emargination. 
The first pair of legs changed 
into two non-coalesced, parallel unci. 
Coxosternal bases evenly arched, 
broad, projecting laterally, bearing 
two-jointed limbs. Basal joint globu- 
lar; apical joint gradually tapering, 
with rounded apex. 
Sternite of second pair of legs a 
short and broad triangle. The tracheal 
stalks are wide apart. Coxae short and 
thick. The two penultimate joints 
(as well as the corresponding joints 
of all the following legs) have large 
soles (fig. 7,g.). The penis (p., fig. 7) 
is a flattened organ twice as long as 
broad, with slightly widening summit, in each corner of which opens a 
seminal duct. Coxae of following ambulatory legs with a dorsal supple- 
mentary ring. 
Copulatory organs of a very peculiar structure (figs. 9, 10, 11). Pelto- 
gonapods narrow at the base, where they are fused together; gently 
widened as far up as the middle, then almost parallel-sided. The summit 
is abruptly expanded, but its sides are folded back and its outline remains 
VOL. XLII. 5 
Fig. 8 . — Calyptophyllum ohvolvatum, n. sp. 
Seventh segment of male. A. Anterior 
section showing traces of dorso-median 
fusion of the two halves of the somite (x.) 
and the outline of the ventral duplica- 
ture (c?.); and B. the ventral duplicature 
viewed from inside. 
Fig. 9. — Calyptophyllum ohvolvatum, n. sp. 
Right peltogonapod, posterior view. 
Flagellum ; p . , process on outer margin ; 
t., tracheal stalk. 
