NO. 14 MILLIPEDS OF WEST INDIES AND GUIANA — LOOMIS 23 



Seventh segment of the males with the ventral median ridge high, 

 thickened on the sides but rather thin at the middle. 



Fig. II. — Microspirobolus dorsetti. a, gonopods, anterior view; b, inner gonopod, 

 posterior view. 



In spite of the fact that there are three legless segments at the pos- 

 terior end of the body of the male type and four legless ones in the 

 other, indicating that the animals are not quite mature, the gonopods 

 of both seem to be fully developed, as shown in figure ii, a and h. 



Type.— U.S. 'HM. no. 1094. 



APOROBOLUS, n. gen. 



Type. — Aporobolus crusoi, n. sp. 



Diagnosis. — This genus is unique in the Anocheta in that there are 

 no repugnatorial pores on segment 7. In all other members of the 

 order, pores extend from segment 6 to the penultimate segment in an 

 unbroken series. The unusually low number of segments and the 

 large basal joint of the antennae are other noteworthy characters. 

 Relationship with Microspirobolus is indicated. 



Description. — Body moderately slender, composed of fewer seg- 

 ments than is usual for the order. 



Head with four fovea on each side of the clypeus. Antennae set in 

 deep recesses on the sides of the head, the basal joint as large or larger 

 than any other joint. Sense cones four. 



First segment narrowed on the sides. 



Second segment not markedly different from the next segment. 



Ensuing segments bisected by a strong transverse constriction. 

 Repugnatorial pores beginning on segment 6 and present on all other 

 segments to the penultimate with the exception of segment 7, a con- 



