NO. 14 MILLIPEDS OF WEST INDIES AND GUIANA LOOMIS 21 



cream-colored spot on each side in front. Anal valves and preanal 

 scale dark, antennae moderately so. Pleurae and basal joints of the 

 legs light-colored, the outer joints darker. 



Head with nearly circular eyes, composed of 21 or 22 large, convex 

 ocelli in 5 or 6 series. Median groove faintly marked on the clypeus 

 and lower part of the front. Clypeal fovea four on each side. 



First segment narrowly rounded on the sides, subacute, the raised 

 rim extending from opposite the eye around to the posterior margin. 



Ensuing segments with the lateral suture sometimes faintly im- 

 pressed beyond the pore, the other sutures not impressed but fre- 

 quently showing as light lines in the integument. Transverse con- 

 striction marked by a pronounced sulcus extending across the dor- 



FiG. 10. — Microspirobolus sigillatiis. a, gonopods, anterior view ; b, gonopods, 

 posterior view. 



sum of all but five or six of the caudal segments ; surface behind the 

 sulcus definitely convex. Pores of moderate size, opening from the 

 intersection of the lateral suture with the transverse suture, between 

 the midbelt and hindbelt, and not quite half way between the im- 

 pressed sulcus and the posterior margin. Surface of the segments 

 lightly aciculated ; ventral striae on the first few segments reaching 

 three quarters of the way to the line of the pores, on the other seg- 

 ments becoming restricted to the vicinity of the base of the legs. 



Last segment rather suddenly rounded at the apex, which equals, 

 but does not exceed, the summit of the valves. Valves not margined. 

 Preanal scale shorter and more broadly rounded than in the other 

 species examined. 



Males with the coxae and other joints of the pregenital legs un- 

 modified. Gonopods as shown in figure 10, a and b. 



Type.—U.S.'NM. no. 1093. 



