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PROCEEDINGS OF THE NATIONAL MUSEUM 



Types. — Holotype and allotype collected at First Sled Road, north 

 of Pacific Marine Station, Dillon Beach, Marin County, Calif., De- 

 cember 10, 1947, by R. J. Menzies; under stones at low-tide line ( — 0.7 

 foot) . Type material has been deposited as follows : 



United States National Museum, holotype male. No. 87697 ; allotype. 

 No. 87698; 8 male and 10 female paratypes, Nos. 87699-87700. Allan 

 Hancock Foundation, 4 male and 14 female paratypes. Pacific Ma- 

 rine Station, 10 male and 14 female paratypes, accession Nos. 1229- 

 1239 Arth. 



Geographical distribution. — California, from Dillon Beach, Marin 

 County, to Newport Bay, Orange County. 



Figure 32. — Jaeropsis duhia, new species: a, Third male pleopod; b, second male pleopod; 

 c, first male pleopods; d, distal margin of first male pleopods; e, inner view of medial 

 margin of second male pleopod; /, female operculum. (Magnification as indicated by 

 scales: b and e same as a: f same as c.) 



