128 PROCEEDINGS OF THE ACADEMY OF [1889. 



sides of body. Male : slenderer than female ; coxa? of 3, 4, 5th, 

 pairs of legs produced into short lobes; tibia and first two tarsal 

 joints beneath with an oval roughened lobe; joints of anterior legs 

 short and thick, third and fourth pairs of legs strongest; tarsi 

 without a pad ; ventral plate of copulation-foot triangular as high 

 as foot, its base not concave, its posterior surface ridged, thus making 

 the plate of a triangular-pyramidal form ; anterior part of first foot 

 not as high as ventral plate, triangularly pointed, the ventral plate 

 ridge separating them ; posterior part of anterior foot as high as 

 ventral plate, its apex with a short blunt lobe on its posterior 

 surface ; posterior copulation-foot bifid, projecting out of the 

 opening, the upper branches flattened -and fan-shaped at its end, 

 which is convex ; lower branch elongate-lanceolate, its upper edge 

 serrate, basal part of foot rectangular and white, while the upper 

 part is yellowish. 



Segments male, 46 ; female, 44. 



Length 52 mm , width 3-8 mm -4-2 mm 



This species is described from six broken and badly preserved 

 specimens. In the type of copulation-foot it resembles that of 

 arboreus and dugesi, and it is very probable that all the species 

 belonging to this group have the same type, i. e. the ventral plate 

 triangular and as high as posterior part of anterior part, while the 

 anterior part is less, the posterior foot bifid and projecting out of 

 the opening. 



I have named this species after Prof. Angelo Heilprin, of the 

 Academy of Natural Sciences of Philadelphia. 



2. Julus moreleti Lucas. 



In the collection are a number of female specimens, which I refer 

 to this species* It has only been found in the Azores Islands. 



These specimens have the stria) of the anterior division of the 

 segments not so irregular as represented in Porath's figure of this 

 species* 



Segments 42-19. Adult almost black, legs reddish-brown ; 

 young dusky, with a lateral row of black spots and a medium black 

 dorsal line, bordered with yellowish. 



3. Mecistocephalus guildingii Newport. 



Three specimens. These are so moulded and broken that it is 

 almost impossible to make much out; but in the characters of the 

 head, they seem to be identical with the West Indian species. 



*Am. nagra Myriopoder frau Azorema. < ")Tver. Kongl. Vet. Akad. Forh., 

 Stockh , 820, 1870. 



