832 REPORT ON ALBATROSS MOLLUSCA DALL. 



Subfamily CORALLIOPHILIKTiE. 

 (mihis CORALLIOPHILA Adams. 

 Coralliophila abbreviata Lamarck. 



Collected at the Abrolhos Islands. It is frequently called C. galea 

 Chemnitz, but that author did not use the Linnean nomenclature. 



Suborder STREPTODONTA. 



Superfamily PTE5TOG-LOSSA, 



Family SCALFL^E. 



Genus SCALA (Humphrey) Auct. 



Section ACRILLA A. Adams. 



Scala pompholyx sp. nov. 



Shell thin, conical, inflated, white, with a pale yellow epidermis, 

 smooth, polished, glassy nucleus, and nine or more whorls; spiral 

 sculpture of fine numerous close-set rounded threads, with narrower 

 interspaces, covering the whole surface, and a single stouter thread mar- 

 ginating the base, on which the suture runs; transverse sculpture of 

 rather irregular rounded wrinkles following the incremental lines when 

 present, but often absent, to some extent reticulating the stronger 

 spirals; also of extremely thin, hardly raised, varieal lamellae, about 32 

 on the last whorl; these are a little more elevated in the vicinity of the 

 suture and a little fainter on the base; suture distinct, not deep ; base 

 imperforate; aperture subcircular, a little augulated below. Maximum 

 longitude of shell, 14; of last whorl, 8; maximum diameter, 7.6 mm . 



FTab. — Statiou 2807, near Galapagos Islands, in 812 fathoms, ooze; 

 temperature, 38°.4 F. 



This species is remarkable for its faint reticulated sculpture, its thin 

 and inflated whorls, and its rapid increase in diameter. I do not find 

 any closely related species to compare it with. 



Scala babylonia Dall. 



Plate xi, Fig. 8. 



Scala babylonia Dall, op. cit., p. 311, June, 1889. 



Shell thin, white, elongate, with fifteen rounded whorls (nucleus lost), 

 each ornamented with about twenty-five thin sharp varices, each of 

 which has a small triangular sharp point half-way from the suture to 

 the periphery; behind these the interspaces are smooth to the suture; 

 in front of the varieal points the surface is sculptured with raised flat- 

 topped threads with wider intervals between them and numerous still 

 finer spiral striae; the spiral sculpture does not crenulate the varices; 

 shell imperforate, without basal disk or cordon ; aperture small ; lip thin, 

 narrow, hardly reflected, tortuous, and a little patulous at the anterior 



