H0.1842. THE HOTHOUSE UILLIPED \s I \ru GENUS cook. 681 



tapering base, curves around the more slender prong and ends in two 

 diverging plates. The fourth prong, carrying the seminal duct, is 

 simple and very slender. It rises from the anterior or dorsal face of 

 the shaft, curves abruptly forward, enters the baseof the third prong, 

 and remains inclosed for nearly its entire length, only the tip emerging 

 at the side o\' the proximal plate o{ the third prong. 



The general form o( the gonopods is fairly well shown in Latzel's 

 figure, though somewhat conventionalized, except for the treatment 

 o( the third prong that sheaths the seminal duct. The sheath is 

 formed by infolding of the edges along the convex outer margin, 

 which appears completely closed in Latzel's figure. 



OXinUS GRACILIS ,C. I.. Koch), 



Fontaria gracilis Q. 1 Koch, System der Myriopoden, p. L42, L847; Die Myriopoden, 

 vol 2, p. 51, pi. 85, fig. L73, L863 

 Paradesm/us gracilis 1 itzel, Myr. der Oest.-TJng. Men., vol. 2, p. 162, pi. 0. fig, 70, 



1SS1 



Paradesmus das s Bollmann, Proc I S Nat. Mug . vol. \o. p. 619, 1887. 



Ortliomorplh: r s Bollmann, Bull 16, l S Nat Mus., p. 197, IS; 1 ;?.- Pocock, 

 Ann. Mag Nat. ffisl ,ser, 6, vol. 15, p. 354, L895. Litems, Deakschr. kais. A.cad. 

 Wiss., Wien, vol. ir. p. 337| 1898. Pocock, Biol. Centr -Amer . Diplopoda, p. L60, 

 L909 



Length oi males 19.21 nun., width 'J. 'J nun.: females 20—22 nun. 

 by 2.5 nun. 



Living colors of adult: Dorsum deep chestnut browu or black. 

 the carina bordered with lemon yellow, the sides chestnut brown. 

 sterna and basal joints of legs pallid: distal joints of legs and apex 

 of last segment o( body rather pale, but distinctly tinged with brown: 



antennas and vertex dark brown, darker than other parts of the head. 

 !Toung individuals are paler brown and lack the yellow color of the 

 carinas. The yellow also disappears in alcohol, leaving the carinas 

 pale like the Neutral surfaces. In some specimens the carinas of the 

 second segment are much darker than the others. 



The three characters used bj Bollman in the diagnosis of Pairadesmus 

 dasys, the tubercles o( the legs o( males, the hairs o( the vertex, and 

 the two rows of bristles on the first and penultimate segments, are 

 present, apparently, in all specimens of gracilis. The fact that they 



had been overlooked by previous writer-- seems to have been the 

 occasion of the naming o( the new species. 



