210 



University of California Publications. 



[Geology 



large and deep, at least in one specimen, the stalagmitic covering' 

 obscures it somewhat. 



This is smaller and more slender than any form heretofore 

 known in California ; the wide and deep ventral furrow is also a 

 striking feature. It has some resemblance to Julus antiquus 



Hey den. 



Length 86-109 mm. 



Width 6 



Width of segments 1.5 



JULTJS CAVICOLA, n. sp. 



PI. 15, figs. 1, 5, 10, and 12. 



Type specimen No. 10007, Univ. Calif. Col. Invert. Palae. Potter Creek 

 Cave, Shasta Co., Calif. 



There are three separate parts of this myriopod, besides 

 another buried in the block in the stalagmitic covering, and sev- 

 eral other smaller pieces and segments. This species is quite 

 different from the Samwel Cave species in several particulars. 

 The ventral furrow is very much reduced in size and hardly 

 noticeable — about 9 m.m. wide on an average. The segments are 

 not so arched or the intersegmental ridge so protruding and very 



inconspicuous. 



Length '. 15-20 mm. 



Width 5.5-6 



Width of segments 1 



Spirobolus australis, n. sp. 



PI. 15, figs. 13 and 14. 



Type specimens Nos. 10008 and 10009, Univ. Calif. Col. Invert. Palae. 

 Asphalt beds at Rosemary, near Los Angeles. 



There is one well preserved fragment embedded in a lump of 

 asphalt, besides a few scattering, isolated segments. This species 

 bears a resemblance to Spirobolus hebes Bollman, from Southern 

 California. In 8. australis the middle of each segment is marked 

 by a well defined furrow. The surface is smooth and shining 

 generally, but in a few places it is very finely punctate. No 

 ventral furrow or a very slight one. The specimen number 

 10009 I place here under this species as the probable early stage. 



