204 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



berg, four are found at ^Yesenberg only, one only at Wesenberg and 

 Raggafer, and four are found in the western as well as the eastern 

 localities. These are Homolichas eichwaldi and Isotelus rcmigerum, 

 which occur at Forby as well as at the eastern localities, Chasmops 

 icesenhergensis which is found at AVait and Forby, and loose on Dago, 

 and Pterygometopus nieszkoivskii, found at Wait and Munnalas. 



There are eleven species of trilobites reported from the Kegel; six 

 of which are common to the Jewe and Kegel and thus of no importance 

 in this discussion; four, Pterogometopus kegelensis, Chasmops hrcvispina, 

 Basilicus kegelensis, and Illacnus Unnarssoni, are found only in the 

 western localities; and a single one Asaphus Icpidus var. kegelensis, is 

 reported from both east and west. This last species has no particular 

 value, for it is very like Asaphus lepidus jewensis; and it is reported 

 by Schmidt not only from New Sommerhusen, which we know to be' 

 Jewe, but also from localities in the Government of Petrograd east of 

 the limits which Schmidt himself set on the distribution of the Kegel. 

 Of the six trilobites found in both the Kegel and Jewe, five are found 

 in the Kegel in the typical region, while one, Chasmops mutica, is 

 listed as a Kegel species only from its occurrence at New Sommer- 

 husen. That there should be five species common to the lithologically 

 unlike Jewe and Kegel, and no species common to the lithologically 

 alike Kegel and Wesenberg strikes one as strange. 



The results of the study are rather suggestive. Subtracting the 

 one species reported from the "Kegel" at Xew Sommerhusen, there 

 are nineteen species of trilobites reported from the Kegel and Wesen- 

 berg. Of these no one is reported as common to the two, while six of 

 the species in the Kegel occur in the Jewe below. Of the four which 

 may be considered strictly typical of the Kegel, not one is found at 

 any locality of the Kegel east of the locality on the railroad near 

 Kedder, forty miles west of Wesenberg. Of the nine trilobites in 

 the Wesenberg, five are restricted to the typical region about Wesen- 

 berg and do not occur in the western region, and four are reported in 

 both eastern and western localities, three of them at Forby, one at 

 Wait, one at ^lunnalas, and one on Dago. 



The most abundant fossil in the Kegel at Kegel itself is Cyclo- 

 crinites spasskii, using that term in its old, broad sense. ^ Following 



1 This usage is, I believe, fuUy justifiable. AU of the five species described by Stolley (51), 

 from Esthonia were found by him associated in the same blocks, so that, so far as their strati- 

 graphic value is concerned, one specific name is as good as five. Most of StoUey's specimens 

 seem to have come from loose boulders at locaUties south of the actual outcrop of strata con- 

 taining these species. 



