316 



bulletin: museum of comparative zoology. 



same time from exactly the same territory, showing that the two 

 species regularly occur together. Bouvier has noted the same fact, 

 and Dr. Barbour tells me that in collecting, the species were in no 

 wise segregated although readily distinguished at a glance by the 

 conspicuous white tips to the antennae in some specimens of jamai- 



76 

 72 



es 



64 



so 

 ee 



52 



4 e 



36 

 32 

 28 

 24 

 20 



27 28 29 30 31 32 33 34 35 36 37 38 39 4Q 41 42 43 



Fig. 4a. 



Fig. 4b. 



Fig. 4a. — Curve showing variation in number of pairs of legs in Peripatus juliformis 

 Guild, var. swainsojiae Ckll. Fig. 4b. Same for Peripatus jamaicensis Grabh. & 

 Ckll. Based on all available data. 



censis. The latter is very less common than juliformis, var. swain- 

 sonac, the specimens of the two being in the proportion of 114 to 8. 

 Of all specimens seen by Bouvier, the ratio is 72: 31, showing a much 

 less evident preponderance of juliformis. There can be no doubt, 

 however, that juliformis is by far the more abundant species. 



Peripatus jamaicensis Grabham and Cockerell. 



Plate 2, figs. 3-4. 



This species is the most sharply distinguished of all the Caribbean 

 Peripati on account of the doubling of the transverse tegumentary 



