Mr. G. Newport on new species of Myriapoda. 265 



3. Z. castanea, mihi. Dark chestnut-coloured, roughened. Length 

 1 inch. Phihppine Islands. 



4. — innominata, mihi. 



5. — heterostictica, mihi. Dull fuscous, with the rings mottled 

 irregularly with small and large blackish confluent spots ; head 

 and collar polished, brown; labial margin blackish, deeply punc- 

 tured ; antennae black. Length 1^ inch. India. 



I have adopted tlie name Zephronia for this genus on the autho- 

 rity of the figure of Z. oralis by Mr. Gray in Griffith's Mnimal 

 Kingdom' (1832), where the characters of the genus, the form of 

 the eyes, and the form and number of joints to the antennse are 

 dehueated, although no letter-press description of the genus or 

 species was then given. Professor Brandt claims to have first 

 described this genus by the name of Sphceropceus, in a paper 

 read to the Academy at St. Petersburg in August 1831 ; but no 

 abstract of this paper was published till 1833. AVhile, therefore, 

 I would not pretend to decide on the priority of these two natu- 

 ralists, I have restricted the genus Zephronia to those species 

 which have but six joints to the antennae, and regard those with 

 seven joints to the antennae as constituting Brandt's genus Sphce- 

 rotherium. 



Genus PoLLYXENUs, Latr., Leach. 

 1. P. lagurus, Linn., Fabr. (sp.) 



Genus FoNTARiA, Gray. 



1 . F. virginiensis, Diurj% (sp.) 



2. ? 



3. — dilatata, Brandt (sp.) 



Genus Polydesmus, Lutr., Leach. 



1. P. complanatus, Linn (sp.) 



2. — canadensis, mihi. Light chestnut-coloured, polished ; with two 

 rows of broad, scutiform, very slightly raised tubercles on the 

 posterior half of each dorsal plate, four in the anterior and six in 

 the posterior row ; posterior border of each plate slightly waved. 

 Albany river, Canada. 



This species very closely approaches the common P. compla- 

 natus of this country, but differs from it in colour, and in the 

 anterior half of each dorsal plate being smooth and entirelv desti- 

 tute of tubercles; and also in the number of tubercles' on the 

 posterior half. 



3. P. acutangulus, mihi. The posterior angles of all the dorsal plates 

 elongated and very acute ; antennas pubescent, with the head and 



