. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. PSEPHIS (PETRICOLA) TELLIMYALIS (CPR.) NOT THE YOUNG OF PETRICOLA DENTICULATA SBY. By G. WiLLETT In most of the California shell collections are specimens of a small Petricola that is common at times along our southern Cali- fornia shores, particularly in the vicinity of Santa Monica. This is the species that Dr. Philip Carpenter named Fsephis tellimyalis (B. A. Rep. Moll. W. N. Am., 1864, p. 641). Later Dr. W. H. Dall (Nautilus XIII, 1900, pp. 121-122) declared Carpenter's species to be the y
. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. PSEPHIS (PETRICOLA) TELLIMYALIS (CPR.) NOT THE YOUNG OF PETRICOLA DENTICULATA SBY. By G. WiLLETT In most of the California shell collections are specimens of a small Petricola that is common at times along our southern Cali- fornia shores, particularly in the vicinity of Santa Monica. This is the species that Dr. Philip Carpenter named Fsephis tellimyalis (B. A. Rep. Moll. W. N. Am., 1864, p. 641). Later Dr. W. H. Dall (Nautilus XIII, 1900, pp. 121-122) declared Carpenter's species to be the young of Petricola denticiilata and it has been thus generally labelled. A few months ago, while the writer was talking with Dr. W. O. Gregg, the well-known California conchologist, he mentioned having taken undoubted specimens of the young of Petricola denti- cidata and stated that they were very different from the shells that we had been considering the young of that species. A short time later Mr. Stanley Field informed the writer that he had taken similar specimens and was of the same opinion as Dr. Gregg. Through the courtesy of these two gentlemen, specimens of the young of Petricola denticiilata were furnished for comparison, and, after a careful study, the conclusion was reached that the two forms compared were entirely distinct and that Carpenter's name tellimyalis must again be applied to the shell under discussion. Petricola tellimyalis is readily distinguishable from the young of P. denticiilata by its entirely different shape, denticulata being much more elongated and not at all triangular. These differences may be easily seen in the appended cut. Plate 17. Los Angeles Museum, Los Angeles, California, April 2, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Southern California Academy of S
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