. Bulletin - United States National Museum. Science. PACIFIC COAST SPECIES. 85 Lingual membrane (Plate I, Fig. D of Terr. Moll., Y. 93): see ante, p. 80, for description of central tooth. Genitalia not observed, but the species is viviparous. Specimens from San Diego are characterized by very coarse strise of growth, not delicate as described above, and with hardly perceptible revolving strioe. From the shell alone I do not believe it possible to dis- tinguish sportella from Toyona. Were it not for the difference in the central tooth of the lingual membrane of the two specimens examined by me,
. Bulletin - United States National Museum. Science. PACIFIC COAST SPECIES. 85 Lingual membrane (Plate I, Fig. D of Terr. Moll., Y. 93): see ante, p. 80, for description of central tooth. Genitalia not observed, but the species is viviparous. Specimens from San Diego are characterized by very coarse strise of growth, not delicate as described above, and with hardly perceptible revolving strioe. From the shell alone I do not believe it possible to dis- tinguish sportella from Toyona. Were it not for the difference in the central tooth of the lingual membrane of the two specimens examined by me, 1 should unite the two. A var. simplicilabris is mentioned by Ancey (Le Nat. IV, 110). Macrocyclis Heiiipliilli, W. G. B. Shell allied to 31. Vancouverensis, but the umbilicus is narrower and not so much excavated, the termination of the last whorl not fig. 48. receding from the umbilicus, as in all forms of Vancouveren- sis and concava ; in all, the whorls are more or less strongly striated within the umbilicus, often almost ribbed in concava; not so in this shell; the texture of the shell is glassy like Ry alina, and there is no trace of microscopic revolving spiral lines found in all the other forms ; beneath, the last whorl is propor- ^•^ff/'^^ tionally wider. Greater diameter 14, lesser 10"""; height 5™™. Macrocyclis HemphilJi, W. G. Binn, An. N. Y., Ac. Sc. i, 356, pi. xv, p. 17. Olympia, Washington Territory, a species of the Oregonian Eegion. Jaw and lingual dentition as usual in the genus; characters of cen- tral teeth not clearly seen. This species is named in honor of Mr. Henry Hemphill, to whom I am indebted for collections from Alaska to Cape San Lucas and in the Eocky Mountains. Macrocyclis I>uraiiti, Newcomb. Shell widely umbilicated, depressed, discoidal, of a dead white or greenish color, thin, with very coarse, rough strife; whorls 4, flattened, the last discoidal, not descending at the aper- ture, below broadly excavated and channeled
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