I have the Leaflets and have that description. It is so short, I am just retyping. Bursa californica sonorana new subspecies Diagnosis: Shell usually smaller and thinner than typical B. californica (Hinds); spire more elevated and more sharply conical: peripheral nodes less massive, more trim in form, and quite acute: varices only moderately heavy and but narrowly separated from the lip margin, the oblong pits commonly reduced to a trace. Aperture large, the typical nodulation and liration greatly reduced, the nodules usually entirely obsolete and the lirations often nearly so, Color white, with a narrow, rather interrupted, brown peripheral band and occasional brown staining elsewhere. Alt. of holotype 99.3, max. diam. 62.0, alt. aperture 58.6, max. diam. aperture 43.5mm. Type locality; Near Guaymas, Sonora, from the shrimp trawls. 1958-59