204 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
berg, four are found at Wesenberg 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 remigerum, 
which occur at Forby as well as at the eastern localities, Chasmops 
wesenbergensis which is found at Wait and Forby, and loose on Dago, 
and Pterygometopus nieszkowskii, 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 brevispina, 
Basilicus kegelensis, and Illaenus linnarssoni, are found only in the 
western localities; and a single one Asaphus lepidus 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 New 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 Munnalas, 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, fully justifiable. All 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 Stolley’s specimens 
seem to have come from loose boulders at localities south of the actual outcrop of strata con- 
taining these species. 
