122 HALIOTIS. 



side? : interior pearly, the coil of the spire rather close and the 

 margin of the pillar flattened. 



Longitude of shell. 28 : latitude, 18 ; altitude, 11"5 ; nucleus behind 

 the anterior end, 17 mill. (Dall.) 



The nearest relative of this shell is H. parva, from the Cape of 

 Good Hope, which differs from our specimens chiefly in the greater 

 prominence of the central rib, and in being a little more circular in 

 outline. 



The shell from the Galapagos agrees so exactly with what we 

 know of H. Pourtalesii and with my own recollection of the type 

 specimen destroyed in the Chicago fire, that I am unwilling to 

 separate it, though the distance between the two localities is so 

 great. (Dall.) 



Near Charles Island, of the Galapagos group, in the Pacific. (In 

 33 fms., sand.) 



H. Pourtalesii Dall, Rep. on Albatross Moll., in Proc. U. S. 

 Nat. Mus. xii, p. 355, t. 12, f. 1, 3, 1889.—/ H. pourtalesii Dall. 

 Bull. Mus. Comp. Zool. ix, p. 79, 1881 ; xviii, p. 395, 1889. 



A species of Haliotis believed by Dr. Dall to be the same as the 

 one above described was dredged near the Florida Reefs, in 200 fms., 

 from the bed of the Gulf Stream by Pourtales, March 31st, 1869. 

 The specimen contained the animal. It was destroyed in the great 

 fire of 1871 in Chicago, together with the entire collections of 

 Pourtales and Stimpson. No specimens of Haliotis have been 

 found since in the West Atlantic or Gulf. 



H. EMM.r. Gray. PI. 14, fig. 75 ; pi. 49, figs. 27, 28, 29. 



Shell rounded, ovate-depressed, having a low convexity (scarcely 

 a rib) on the upper surface parallel with the row of holes, and 

 numerous lamellae radiating from the spire; sculptured throughout 

 with fine spiral cords ; open holes 6. 



The form is short oval, right margin straighter than the left. 

 The upper surface has a low wide spiral rib with oblique undula- 

 tions or folds upon it which take the direction of tangents from 

 the spire ; and between this and the spire there are numerous radiat- 

 ing raised lamellae like pinched-up folds taking the direction of 

 growth-striae. The entire surface has acute growth-stria', appearing 

 as little scales on the fine rounded spiral cords. There is a channel 

 outside of the row of holes. The color is a beautiful orange-red, 

 with wide rays of lighter; outside of the row of holes there are 



