310 



bulletin: museum of comparative zoology. 



Salivary glands terminating between the seventh and tenth praeanal 

 pairs of legs; nephridial tubercles broadly attached; 28 pairs of legs in 



the male P. evansi Bouvier. 



Primary papillae subequal, rarely separated by accessory papillae, the 

 latter being disposed on the flanks of the folds; lozenge-shaped color 

 markings on the body above; 28-29 pairs of legs in the male and 29-32 



pairs in the female P. edwardsii Blanch. 



Primary papillae of extremely varied dimensions, sometimes separated 

 by accessory papillae; no dorsal lozenge-shaped markings; 28-32 pairs 



of legs in the female P. simoni Bouvier. 



Creeping pads of the usual size; nephridial tubercles deeply excavating 

 the fourth band of the creeping pad and dividing it into sections; 

 26-28 pairs of legs in the male, and 30 in the female. 



P. biolleyi Bouvier. 

 Creeping pads very narrow; nephridial tubercles pushing out the fourth 

 band of the creeping pad laterally; the latter greatly reduced; 26 pairs 



of legs in the male, and 29-32 in the female 9 



Internal mandibular blades with one accessory tooth; primary papillae 



more nearly equal P. nicaraguensis Bouvier. 



Internal mandibular blades usually with two accessory teeth; primary 

 papillae strongly unequal . P. nicaraguensis var. isthmicola Bouvier. 



Peripatus barbouri, sp. nov. 



Plate 1. 



Form of body, dimensions. The body is moderately elongate, and slightly 

 flattened, but less noticeably so in the largest specimen. The following 

 table gives the measurements of the three specimens: 



Total length of body 

 Greatest width 



Largest 



50 mm. 

 7.3 mm. 



Type 



53 mm. 

 5.5 mm. 



Smallest 



38 mm. 

 4.8 mm. 



Coloration. So far as the three living .specimens are concerned, the color 

 of this species appears to be very constant. The upper side of the body is 

 dark purplish slate-color, almost black, except when seen in sunlight when the 

 velvety texture of the integument causes it to assume a distinctly grayish 

 or glaucous tinge. The region directly along the median dorsal line is some- 

 times more nearly black, but not in all cases. Aside from this, however, the 

 upper side is entirely without color pattern, and presents no indication of the 



