NO. 14 MILLIPEDS OF WEST INDIES AND GUIANA LOOMIS 49 



Anal valves flattened, with moderately raised margins ; disk of each 

 valve with an angular fold or ridge extending upward from the lateral 

 corner of the scale. Preanal scale triangular, the setiferous tubercles 

 exceeding the median angle. 



Gonopods shaped somewhat like those of D. trinidadensis, but the 

 median portion of the long inner arm is expanded just below the distal 

 half (fig. 24, b). 



Males with the fourth sternum bearing two rounded, finely hispid 

 tubercles ; first joint of each fourth leg with a tubercle of about the 

 same size. 



Females with the anterior ventral margin of the third segment 

 gradually raised from each side to form a low ridge or rim, which is 

 highest at the middle of the body. 



Type.—U.^.^M. no. 1103. 



lOMOIDES, n. gen. 



Type. — lomoides hispidiis, n. sp. 



Diagnosis. — This genus seems to be closely related to loinus Cook, 

 but is more convex and more compact ; the lateral carinae are not as 

 broad or as deeply incised, although with the same number of marginal 

 lobes. The rows of large dorsal tubercles converge caudad instead of 

 diverging or running parallel, and the third joint of the legs is longer 

 than the last joint. 



Description. — Body very compact, about four times as long as wide, 

 the dorsum very strongly arched ; lateral carinae broad, exceeding 

 the legs, the anterior corners lower than the bottom of the body cavity. 

 Surface of the carinae and the dorsum roughened, including the four 

 longitudinal rows of large tubercles. Segments 2 to 5 inclusive gradu- 

 ally widening, the ensuing segments to the sixteenth of uniform width, 

 after which they narrow rapidly. The posterior subsegments are ab- 

 ruptly raised high above the anterior subsegments, the face of the 

 elevation being distinctly recessed, receiving the posterior edge of 

 the foregoing segment when the body is held straight ; anterior margin 

 of the segments with a definite scallop between the outer and inner 

 row of tubercles on each side, and two other scallops between the 

 inner rows of tubercles. 



Head quite convex, completely hidden beneath the first segment ; 

 surface between and above the antennae elevated and roughened, 

 below the antennae the surface is somewhat shining and hispid. An- 

 tennae strongly clavate, geniculate, joint 5 broadest and longest. 



First segment subhexagonal, greatly exceeding the head in front, 

 narrower than the second segment, twice as broad as long ; central 



