MACHILIS. 237 



about as long as the two basal. In Templeton's figure 

 only tlie first two segments point fiDrwards ; and they 

 are succeeded by a recurved many-jointed " whip." 

 This does not at all agree with my specimen. 



The lesser palpi are 3-jointed ; the basal segment is 

 shorter than the other two, which are nearly equal in 

 length, the terminal one being somewhat swollen, 

 though not so much so as in Templeton's fig. 1 d. 



Geofcoy describes the corresponding organs of his 

 Forhicina teres saltatrix as 2-jointed, another point in 

 which it differs from M. ]JolyiJoda. 



The feet are biunguiculate. 



I do not find it observed by previous writers that 

 each of the four posterior legs bears an appendage on 

 the basal segment, closely resembling the eight anterior 

 ventral appendages. Their presence appears greatly 

 to strengthen the argument of those who regard these 

 appendages as rudimentary legs. It is moreover 

 particularly interesting, if we remember that the peculiar 

 genus Scolopendrella has a very similar pair of append- 

 ages attached between each pair of legs except the 

 first. 



In M. iJolypoda the anterior abdominal segment 

 appears to want these appendages. In the following 

 eight segments they are attached near the posterior 

 margin, and are about equal in size, except the last, 

 which is considerably larger than the rest. Between 

 this last pair is a strong, straight, stiff appendage, 

 which gradually tapers from the base, ending, however, 

 abruptly. It is divided into about thirty subsegments, 

 each with a whorl of stiff", short hairs. 



M. maritima, Leach. 



Petrolius maritimus, Leacli. Edin. Encycl,, ix, p. 77. 



— — ,, Zool. Miss., vol. iii. 

 Machilis maritima, Latreille. Nouy. Ann. d. Museum, 1S32. 

 Petrohius maritimus, Templeton. Trans. Ent. Soc, vol. i. 



— — Webb and Bei'thelot. His. Nat. des Isles 



Canaries. 



