The Graspedosomatidse of North America. 21 



seya there is a rounded projection from the rim of the opening, 

 on the posterior side. 



21. Coxse of eleventh leg with a large conic process : Pseudo- 

 tremia, Cleidogona. In Pseudotremia the process projects from 

 near the base of the coxa, in Cleidogona from the middle or above, 



22. Eleventh and twelfth legs with coxa prominent, tuberculate : 

 Conot^'la. 



23. Eleventh legs with third joint proximally produced into a 

 large, somewhat curved process : Conotyla. 



24. Eleventh and twelfth, and probably the succeeding legs, tu- 

 berculate on the third and fourth joints : Caseya. 



25. Pedigerous lamina of twelfth legs with a large conic pro- 

 cess directed cephalad: Cleidogona Conotyla, Pseudotremia. 



In addition there should be noted an aperture near the distal 

 end of the second joint of the ninth legs of Cleidogona In- 

 side the joint may be traced a duct or gland running nearly its 

 whole length. In one mounted specimen this is filled with air 

 and shows very clearly, also very numerous minute tubes opening 

 into it. The opening is on the ventral face of the joint, under the 

 base of the third joint, which is flexed upon the second. In the 

 specimen mentioned an irregular mass, probably a secretion har- 

 dened by alcohol, lies in the aperture. 



Characters of the Family. 



As nothing purporting to be a complete description of the 

 present family has ever appeared in English, we offer the follow- 

 ing attempt at supplying the deficiency, although future study 

 will probably necessitate amendments. 



Family Craspedosomatid^ Gray. 



Todd's Cycl. III., p. 546 (1842). 



Chordeumidse, C. L. Koch, and many recent authors. 



Lysiopetalidse {pro parte majore) of Cope, Eyder and Packard. 



Body moderately elongate or slender, depressed, convex or cylindric, sub- 

 fusiform, capable of being spirally coiled. 



Head larger and broader than the first segment, which fits into a concavity 

 of the head instead of covering the hind portion of it as in lulidse. 



Eyes iTSually well-developed, of numerous (10-30) ocelli arranged in defi- 

 nite patches ; entirely wanting in certain cave forms. 



