50 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



FAUNAL RELATIONS 



The invertebrate fauna occurring in the sedimentary rocks 

 just described is entirely of marine origin. Altogether 42 spe- 

 cies are present. In the lower beds outcropping at Orchard 

 Point and represented by belt (G), the only species found 

 are Cardhim lorenzanum (Arnold), Nucula, sp., and Tellina 

 oregonensis Conrad. In the following table the fauna listed 

 from locality No. 13, comes from the sandy shales north of 

 Restoration Point in belt (C). Locality No. 304 is located 

 at the west end of Quarry Point and the fauna occurring there 

 belongs to belt (C). Locality No. 305 occurs at Beans Point 

 in the lower portion of belt (F). 



The most characteristic species occurring in this region are 

 Acila gettysburgensis Reagan, MacrocalUsta vcspertina (Con- 

 rad), Marcia oregonensis (Conrad), Modiolus inflatus Dall, 

 Panope generosa (Gould), Phacoides aciitilineatiis (Conrad), 

 Solcmya ventricostata Conrad, Thracia trapczoidea Conrad, 

 Eudolium petrosum Conrad and Turcicula washingtoniana 

 Dall. The most fossiliferous portion of the formation is in 

 belt (C). The fauna occurring in belt (F) except in the num- 

 ber of species does not differ greatly from that in belt (C). 

 The conglomerates and coarse-grained sandstones composing 

 the lowermost beds of the section as exposed at Orchard Point 

 is almost entirely barren of fossils. This lower belt may cor- 

 respond to the upper part of the Porter horizon or Turritella 

 porterensis zone as exposed in the Chehalis Valley. 



The fauna appearing in belt (C) at Restoration Point is 

 almost identical with that occurring to the east within the city 

 of Seattle, and in the sandy shales on the north slopes of the 

 Newcastle Hills. It may also be correlated with that at Fid- 

 dlers Bluff about two miles south of the town of Snohomish. 

 The shales and sandy shales outcropping between Pysht and 

 Gettysburg are also to be referred to this horizon or faunal 

 zone. The following table gives the distribution of the marine 

 fauna occurring in the Bremerton Inlet area : 



