NO. 12 STRONG AND HERTLEIN : MARINE MOLLUSKS 245 



growth; sutures impressed; the last whorl with a strong spiral cord on 

 the shoulder, the area between it and the suture concave; periphery 

 well rounded; base rounded, with a spiral cord on the middle similar 

 to that on the upper surface; umbilicus entirely filled with a concave 

 callus pad ; aperture nearly circular, slightly angulated by the basal cord, 

 the posterior angle falling a little below the upper cord, outer lip thin; 

 inner lip thick, strongly curved, with a thin callus over the body of the 

 shell. The type measures: greater diameter, 1.5 mm; height, 0.7 mm. 



Holotype: No. 744 (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. Six additional specimens were 

 dredged at the same locality. 



Among the specimens described from the west coast this seems to 

 be nearest to Teinostoma supravallata Carpenter'''- from southern and 

 Lower California. The latter has a similar subsutural cord but lacks 

 the one on the base. 



This species is named for Washington Henry Ochsner, who, as 

 geologist, accompanied the expedition of the California Academy of 

 Sciences to the Galapagos Islands, 1905-1906. Mr. Ochsner collected 

 many marine and land shells for the Academy's collection during that 

 expedition. 



72 Ethalia supravallata Carpenter, Proc. Calif. Acad. Sci., vol. 3, February, 

 1866, p. 215. ''Hub. San Diego, Cooper, shell-washings." 



