32 Proceedings of the Biological Society of Washington. 



The type (Cat. No. 172,947, U.S.N.M.) comes from the U. S. Bureau of 

 Fisheries Albatross Station 3422, off Acapulco, Mexico, dredged in 141 

 fathoms on mud bottom. The type measures: length, 5.1 mm.; altitude, 

 4.5 mm. 



Xylophaga californica, new species. 



In Xylophaga californica there are about fourteen denticulated ridges to 

 a millimeter in the center of the posterior area, and the denticulated ridge 

 bearing posterior median portion is .7 mm. in width at the angle of junction 

 of the posterior with the median part. 



The type, Cat No. 209,876, U. S. N. M., comes from the U. S. Bureau of 

 Fisheries Albatross Station 4525, off Pt. Pinos Light, California, in 75-108 

 fathoms, on mud bottom. The type measures: length, 4.9 mm.; altitude, 

 4.7 mm. 



Xylophaga washingtona, new species. 



In Xylophaga washingtona there are about ten denticulated ridges to a 

 millimeter in the center of the posterior area and the denticulated ridge 

 bearing posterior median portion is 1.2 mm. in width at the angle of junction 

 of the posterior with the median part. 



The type. Cat. No. 344,479, U. S. N. M., was collected by Dr. C. C. Eng- 

 berg at San Juan Island, Washington. The type measures: length, 5.7 

 mm.; altitude, 5.5 mm. There are two additional specimens entered from 

 the same station under the same catalogue number. Cat. No. 226,151, 

 U. S. N. M., represents two specimens from the U. S. Bureau of Fisheries 

 Albatross Station 2867, oif the coast of Washington, taken from a piece of 

 wood dredged in 37 fathoms. Cat. No. 331,683, U. S. N. M., contains 13 

 specimens dredged at U. S. Bureau of Fisheries Albatross Station 5432, off 

 Oregon. Cat. No. 341,157, U. S. N. M., contains 95 specimens from U. S. 

 Bureau of Fisheries Albatross Station 3456, off Washington, dredged in 136 

 fathoms on gray sand bottom, bottom temperature 42.2°. Cat. No. 341, 158, 

 U. S. N. M., contains 5 specimens collected by Mrs. Oldroyd in Departure 

 Bay, British Columbia. These were taken from a dead twig. An addi- 

 tional lot from the same place is in Mrs. Oldroyd's collection. 



