NO. 1169. THE FAMILY STltIARllDJ£— COOK. 669 



account be overlooked in taxonomy and classification, but should be 

 ascribed to isolation since remote periods, as the geologic remains 

 testify . 



ANALYTICAL KEY TO TIIK SIHORDERS OK CdXOClIKIA. 



Body composed of over 40 segmeuts; repugnatorial pore-s ijreseiit: .Suborder Lys- 



lOl'ETALOIDEA. 



Uodj' composed of 30 segments (rarely 26, 28, or 32); repugnatorial pores want- 

 ing 



First segment subreniform, narrower and smaller than the large, exposed liead; 

 last segment entire at apex : Suborder Ciioi{Deumatoiuka, 



First segment l)roadly expanded in front and below, lioodlike, including and con- 

 cealing the much smaller head; last segment three-lobed at a])ex : .Subonler Stuia- 



UIOIDEA. 



Suborder LYSIOPETALOIDEA Cook. 



Callipodoulea Pocock, Journ. Linn. Soc. London, 1894, XXIV, p. 477. 

 Lijaiopetaloidea Cook, Ann. N. Y. Acad. Sci., 1895, IX, p. 3. 



Body subcylindric, composed of more than 40 segments in the adult, 

 capable of being coiled in a close spiral; exoskeleton moderately thick 

 and firm. 



Head large, exposed; antennic remote; labrum not produced. 



First segment small, narrower than the head. 



Segments with very numerous longitudinal grooves whose prominent 

 edges arc called carina;; setiferous tubercles wanting; repugnatorial 

 l^ores ])resent. 



Anal segment entire; movements agile. 



The name to be used for this suborder depends upon the distinctness 

 of the genera Callipus Kisso, and LyHiopetaluin Brandt. If held as 

 synonymous, the former name is ohler and family and subordinal desig- 

 nations must be founded upon it, but until this identity is more clearly 

 proven the priority of the family name Lysiopetalidic requires its use, 

 with which the suborder should be made consistent. 



Suborder CHORDEUMATOIDEA Cook and Collins. 



Chordeumatoklea (;ook and Collins, with Pocock, Max Weber's Rcjise, 1894, 



p. 341. 

 CraspidoHoviatoidea Cook, Ann. N. Y. Acad. .Sci., 1895, IX, p. 3. 



Body sub.sylindric or depressed, subfusiform, composed in the adult 

 of 30 segments (rarely 2G, 28, or 32); capable of being coiled into a 

 rather open spiral; exoskeleton thin and fragile. 



Head laige, exposed; anteun.i' remote; labrum not produced. 



First segment large, narrower than the head, and articulated in a 

 broad emargination of its occiput. 



►Segments usually smooth, rarely somewhat roughened, but in all 

 such ca.ses with the dorsum fiattened and the sides produced into 

 lateral carinte after the manner of the Polydesmidfc ; setiferous tubercles 

 present, six on each segment; repugnatorial pores wanting. 



