THE NAUTILUS. 



127 



figured and described in Man. Conch., vol. 14, p. 300, pi. 63, 

 figs. 60, 61. It is from Olympia, Wash. 



Trachydermon lowei n. sp. 



Oval, rather depressed, dirty buff, a little darker towards 

 the beaks, which project somewhat. Surface of the valves 

 finely, closely and evenly granose throughout, the granules 

 oblong. The anterior valve and posterior area of the posterior 

 valve have a few very weak, low radial impressions. The 

 mucro of the posterior valve is slightly post-median, but little 

 raised, the slope behind it being convex towards the edge. 

 The interior is white, stained buff or pinkish near the sinus, 

 where it is conspicuously porous. The eaves are wide and 

 closely porous throughout. Teeth smooth, those of the pos- 

 terior valve being directed forward. Girdle is densely cov- 

 ered with minute elongate scales. 



Length about 17, width 12 mm. (San Pedro). 



Length about 19, width 13 mm. (San Pedro). 



Length about 16, width 11 mm. (White Point). 



San Pedro, Cal. Collected by Mr. H. N. Lowe. Type no. 

 117955 A. N. S. P., paratype no. 1545 Lowe coll. 



This species is much more distinctly granulate than T. ray- 

 mo ndi, and the eaves are much wider and more porous. 



The paratype in Lowe coll. is from White Point. There is 

 also a smaller specimen, red with blue-green spots, from San 

 Pedro, but as it has not been disarticulated I do not feel cer- 

 tain of its identity. 



Description op New Species op Shells Chiefly from 

 Magdalena Bay, Lower California. By W. H. Dall. (Proc. 

 of the Biol. Soc. of Washington, vol. 31, pp. 5-8, 1918.) The 

 following new species are described: Scintilla chloris, Macron 

 orcutti, Phenacolepas magdalena, Trichotropsis lomana, Liotia 

 rammata, L. olivacea, L. cookeana, and three new varieties. 



