MILLIPEDS OF PANAMA—LOOMIS 83 
Chondrodesmus panamenus Chamberlin 
Ficure lj 
Chondrodesmus panamenus Chamberlin, Proc. U.S. Nat. Mus., vol. 60, Art. 8, 
p. 46, pl. 17, fig. 10, pl. 18, figs. 1-3, 1922. 
Canal Zone, broken male and female, Barro Colorado Island, 
June 6, 1923, O. F. Cook; single females, same locality, February 
1955 and May and June 1956, C. W. and M. HE. Rettenmeyer. 
The gonopods (fig. 17) are relatively small for the size of the animal 
and are withdrawn into the body with only the tips projecting in 
the single male seen. 
Chondrodesmus pittieri, new species 
FicureE 1k-l 
Houotyre: Male, badly broken, USNM myriapod collection 
2635, Puerto Obaldia, Panama, collected by H. Pittier prior to 1916. 
Diacnosis: Relationship with the Peruvian C. maranonus 
Chamberlin, founded on a female, seems indicated by the large size 
and location of the pores but differs in the much less produced pos- 
terior corners of the keels. 
Description: Width 15 mm. Mentum of gnathochilarium with 
numerous very long, slender, forwardly directed setae closely appressed 
to the surface. Dorsum less convex than usual in the genus, the lateral 
carinae broad and more nearly horizontal. Dorsal surface so greatly 
eroded through drying or other causes that its exact sculpturing can- 
not be determined, but there is a series of 10 to 14 small low rounded 
tubercles adjacent to the posterior margin of segments, with a few 
others scattered over surface in front of them. Lateral carinae with 
anterior margin smooth; outer margin of poreless segments almost 
straight, the others emarginate opposite the median portion of the 
callus area; posterior margin with a distinct tooth near posterior angle 
and a smaller one mesad of it; posterior angles small, slightly more 
pronounced on poriferous segments but scarcely caudally produced 
except on segments 17 to 19. Pore calluses dorsal (fig. 1k), greatly 
flattened and consisting of a raised semicircular swelling enclosing 
the pore except on the outer side where the margin is no thicker than on 
poreless segments; pores well removed from lateral margin and open- 
ing almost vertically. 
Gonopods as shown in figure 1/, the basal joint with a fingerlike 
lobe arising from ventromesal side and curving outward; both terminal 
branches bent sharply outward near middle. Ventral surface of seg- 
ment 7 strongly elevated in front of the opening for the gonopods. 
