Packard.] 410 [May 4, 



is going through the press) , by Mr. C. A. Walker, I detected a lively 

 little yellowish white creature, which immediately suggested Sir 

 John Lubbock's Pauropus. A closer examination showed that it was 

 indeed a species of Pauropus, very closely allied to P . pedunculatus 

 Lubbock, and intermediate in the form of the antennae, between that 

 species and P. Huxleyi Lubbock. It may be called Pauropus Luh- 

 bockii, in honor of the original discoverer of this remarkable type of 

 Myriapods. No more interesting articulate, as Lubbock remarks, has 

 been discovered for many years ; and the occurrence of a species in 

 America is worthy of note. Lubbock (Trans. Linn. Soc. xxvi, 

 p. 181-190, 1867,) has given a detailed descript on of the genus, 

 and an able discussion of the value of the group which it represents, 

 which he considers as an order equivalent to the Chilopods on the 

 one hand, and the Chilognaths (Diplopods) on the other, and for it 

 suggests the name Pauropoda. 



It differs from other Myriapods in having but nine pairs of legs, 

 and bifid antennae terminating in singular sensory appendages. The 

 mouth-parts resemble those of the Chilopods in a rudimentary condi- 

 tion, and there are no tracheae. The species are of remarkably 

 small size, though shown by Lubbock to be mature, as he found 

 spermatozoa developed in them. The young have but three pairs of 

 legs, as do the young of other Myriapods so far is as known. "This 

 little genus, therefore," as Lubbock remarks, " does not possess the 

 characteristics of either order of Myriapods, but forms a link not 

 only connecting the Chilopods and Diplopods together, but also 

 bridging over to a certain extent the great chasm which separates 

 them from other Articulata." 



P. Lubbockii differs chiefly from P. pedunculatus Lubbock, .to 

 which it seems more nearly allied than P. Huxleyi, in the multiarti- 

 culate process on each branch of the bifid antennae being of nearly 

 equal length. The bulbous termination, somewhat resembling the 

 end of a tenant hair on the feet of the Poduridae, and other insects, is 

 not globose, but subcorneal, the base being swollen. The form of the 

 antenna! joints and their hairs, and the third multiarticulate append- 

 age to the fourth joint, is the same as in P. pedunculatus. The form 

 of the ringed, pyriforni organ, situated between the two appendages 

 of the fourth antennal segment, closely resembles that of P. Huxleyi, 

 the organ being sessile and much smaller than in P. pedunculatus. In 

 other respects, such as the form of the body and the blunt hairs scat- 

 tered over it, the legs, and claws, and the median appendages at the 



