356 REPORT ON ALBATROSS MOLLUSCA DALL. 



prominent; holes about twenty-five, of which five remain open, the 

 margins of these rather prominent; outside the row of holes the usual 

 sulcus is strongly marked; about midway from the suture to the line 

 of holes is a raised rib, rather obscure, but differing in different individ- 

 uals and corresponding to an internal sulcus; between the central 

 ridge and the suture there are no undulations or transverse ridges of 

 consequence; sculpture of well marked, rather flattish, spiral, close-set 

 threads, sometimes with a single finer intercalary thread, overlaid by 

 smaller rather compressed transverse ridges, in harmony with the in- 

 cremental lines; on top of the spirals the ridges bulge like the threads 

 of worsted on canvas embroidery ; spire situated well forward and with 

 subvertical sides; interior pearly, the coil of the spire rather close and 

 the margin of the pillar flattened. Longitude of shell, 23 ; latitude, 18 ; 

 altitude, 11.5; nucleus behind the anterior end, 17 mm . 



Hab. — Station 2815, in 33 fathoms, sand; near Charles Island, of the 

 Galapagos group, in the Pacific. 



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

 Hope, which differs from our specimens chiefly in the greater promi- 

 nence 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 E. 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. 



The occurrence of this shell at the Galapagos is of great interest 

 apart from its supposed connection with the Floridian species. No 

 species of Haliotis is known from the west coast of South America, of 

 Central America, or of North America south of northern Mexico. 

 There are one or two small not nearly related species in the Melaneshiu 

 Islands and north Australia. So the present species is remarkably 

 isolated. Nothing of the sort has been previously recorded from the 

 Galapagos. Two specimens were obtained, neither containing the soft 

 parts. The original type of H. Pourtalesii contaiued the animal. It 

 would probably be referred to the section Padollus. 



Family FISSURELLID.E. 



Genus PUNCTURELLA Lowe. 



Puncturella circularis Dull. 



Collected at Station 2751, in 880 fathoms, ooze; east from Tobago ; 

 temperature 37°.9 F. 



Puncturella falklandica A. Adams. 



Collected at Station 2785, in ±±9 fathoms, mud, on the west coast of 

 Patagouia; temperature 47° F. 



This species is amazingly like P. noachina ; the only differences I have 

 been able to see in the shells are that in P. noachina the fissure is gen- 

 erally longer, the septum longer and less vertical, and the apex more 



