244 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 2 



In general appearance this species is very similar to Delphinoidea 

 hannai Strong & Hertlein, but it is much larger and flatter, with fewer, 

 less distinct spiral threads and a more open umbilicus. 



This species is named for Dr. Gustav Hambach, whose library and 

 collections, acquired by the California Academy of Sciences after the 

 earthquake and fire of 1906, have been of great use in research work. 



Teinostoma hemphilli Strong & Hertlein, new species 

 Plate 23, Figs. 5, 8, 11 



Shell minute, helicoid, smooth except for fine lines of growth, trans- 

 lucent, shining; nuclear whorls about 2, merging imperceptibly into the 

 following whorls; postnuclear whorls about 2^, well rounded, sutures 

 closely impressed, with the basal portion of the preceding whorl shining 

 through the wall of the succeeding whorl, the last whorl only moder- 

 ately enlarged; periphery and base well rounded; aperture nearly circu- 

 lar, outer lip fairly thick; inner lip strongly curved, thickened, with a 

 spreading callus which forms a pad nearly filling the umbilicus but 

 leaving a narrow open chink. The type measures: greater diameter, 1.1 

 mm; height, 0.8 mm. 



Holotype: No. 743 (Calif. Acad. Sci. Paleo. Type Coll.), from 

 Loc. 27,229 (C.A.S.), dredged in from 3 to 9 fms. in Bahia Honda, 

 Panama. L. G. Hertlein collector. Thirteen additional specimens were 

 dredged in the same locality and 2 specimens dredged off Taboga Island, 

 Panama. 



This species is evidently quite similar to "Vitrinella" regularis C. B. 

 Adams''^^ but is smaller and lacks the "impressed spiral line just below 

 the suture." The new species also has a higher spire and the columella 

 is more nearly vertical than in the species described by Adams. 



This species is named for Mr. Henry Hemphill, early collector of 

 mollusks on the Pacific coast. Much of his fine collection is now in the 

 California Academy of Sciences. 



Teinostoma ochsneri Strong & Hertlein, new species 

 Plate 23, Figs. 6, 9, 12 



Shell minute, depressed, semitransparent ; nuclear whorls 2, rounded, 

 smooth; postnuclear whorls 2, everywhere marked with curved lines of 



71 Vitrinella regularis C. B. Adams, Ann. Lyceum Nat. Hist. New York, 

 vol. 5, 1852, pp. 412 (No. 266), 540. "Panama." 



Teinostoma regularis C. B. Adams, Baker, Hanna & Strong, Proc. Calif. 

 Acad. Sci., ser. 4, vol. 23, no. 15, 1938, p. 239, pi. 22, figs. 1, 2, 3. Maria Madre 

 Island, Tres Marias Islands, Mexico. 



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