MYRIOPODA. 
325 
Subgenus Fontaria, Gray, (P. virffinicnsts, Drury.) 
Stronfff/losoma, J3randt. 
Section I. Oa i/urus, Koch (Leptodesmm, Saiiss.). (P. dilatatus, Brdt.) 
II. Strongylosoma, Erdt.^ 5. s. {Tropisoma, Koch) (P 
KpeSj Oliv.) 
Subgenus Fhachidomorpha, Sauss. (P. rosaceus, Brdt.) 
FJiacopJwrmy Koch (^IthacMs, Sauss.). (P. schomhurgkii^ Erich.) 
Crgptodesmus, Peters (/. c. p. 621), (P. olfersii, Brdt.) 
Polydesmus, Latr., s. s. (P. complanatm, Linn.) 
Trachelodesmus, Peters (/. <?, p. 623). 
Scytonotm, Koch. (P. granulatus, Say.) 
Paradesmus, Pet. {Paradcsmm, Sauss., exp.'). (P. piceus, Brdt.) 
Fttryurm, Koch {Paradestnus, Sauss., ex p.). (P. erythroprygm., 
Brdt.) 
Odontodesmus, Sauss. (P. javanus, Sauss.) 
Stenonia, Gray {Platyrhams, Koch). (P. clathratus, Gerv.) 
Genus Eurydesmus, Sauss. 
Strongylodesmus, Sauss. 
Neio genera : — 
Sp>li<xriodesmus, Peters (Monatsber. Berl. Akad. 1864, p. 529). Allied to 
Gloi7i€rides?nm, but with the fourth and fifth segments most developed. 
Type Glomeridesmus mexica7itis, Sauss. 
C7'yptodesr)7iis, n. subg., Peters (/. c. p. 621). Allied to RhacopIw7'tfs, but 
difiering from it by the projecting first segment, which completely conceals 
the head, and the flattened last segment. Type Polyd. olfe/si'ij Brdt. 
7'7'achelodes77iiis, n. subg., Peters (/. c. p. 623). Neck peculiarly attenuated ; 
legs long ; antennse thin. Sp. Polyd. a7'cticollis, Peters. 
New species : — 
Oniscodesmus aura7itiac7i.s, Peters (1. c, p. 530), from Caraccas ,* OTiisco- 
des7fi7/s 7'id)ricepSy Peters {1. c. p. 617), from Bogota ; Cyrtodesmm nsper^ 
Peters (7. e. p. 618), from Bogota. 
Mr. Wood describes the following species of Polydesmus : — 
In the suhgenus Fmiiaria : — P. trimaculafMS, from Pennsylvania (Proc. 
Acad. N. S. Phil. 1864, p. 6) ; P. corr7ignt7(s, from Michigan (p. 6) ; P. hifdirSy 
from Georgia (p, 7) ; P. crassic7itis, from Mississippi (p. 7). 
In the subgenus Polydcs77ms : — P. Mspidipes, from Illinois (p. 81). 
In the subgenus Sfc7707iia : — P. cerasimis, from Oregon fp. 9). 
In tlie subgonus St7-o77gy1oso777n : — P. cr7ien, from Oregon (p. 9). 
In the subgonus Lepfodes77i7fs : — P. placidns^ from Michigan (p. 9) ; P. 
Jlo7'iduSy var. ?, from Michigan (p. 9) ; P. Jiayde77ia7iuSy from Oregon (p. 10). 
Peters describes the following species of the great genus 
Polydesmus as defined by him : — 
In the suhgenus Fontaria : — Polydesmus martcmii (1. c. p. 531), from Yoku- 
hama. 
In the subgenus Stro7igyloso7nay section Oxyurus : — Polydesmus acanthurus 
