330 BULLETIN: MUSEUM OF COMPAEATIVE ZOOLOGY. 



margin entire, simple, in the adult, in the young slightly crenulate by the radial 

 sculpture ; conceutric sculpture feeble, chiefly of the incremental lines ; radial 

 sculpture of rather conspicuous threads with wider interspaces in the young; the 

 threads flatten and become much wider and the interspaces mere grooves, in the 

 adult; longer diam. of base about 25 mm., height 9 mm. 



U. S. S. "Albatross," station 2781, off the Chilean coast, in 348 fathoms, mud, 

 temperature 50° F. U. S. N. Mus. 96,926. 



This species differs from C. ungaricus in its closely coiled spire and different 

 periostracum, and from the Peruvian C. ungaricoides Orbigny, in its strong sculp- 

 ture, symmetrical habit, and different color. 



Hipponicidae. 

 HIPPOKIX Defrance. 



Capulus {pars) Montford, Conch. Syst., 1810, 2, p. 55, and figure. 



Amalthea a, Schumaclier, Essai, 1817, p. 181, sole ex. A. conica Schumacher = Pa(e//a 



australis IjSLm.,jide Smith. Not Amaltheus Montfort, 1810. 

 Hipponix Defrance, Bull. Soc. Philom. Paris, Jan., 1819, 3me ser, p. 8-9 (type, H. 



cornucopiae Defr.) Journ. de pliys., de chymie, d'liist. nat., etc.. Mar., 1819, 88, 



p. 217; Ferussac, Tableau, 1821, p. xxxvii. ; Defrance, Diet. Sci. Nat., 1821, 



torn. 21, p. 185; Deshayes, Encyc. Me'th., 1830, 8, p. 274; Anton, Verzeich- 



nisa, 1839, p. 28. 

 Pileopsis (pars) Lamarck, Anim. 8. Vert, 1822, 6, 2, p. 19 (Les hyponices Defrance), 



Pileopsis cornucopiae Lamarck ; Defrance, Tabl. Corps Organ., 1824, Les hip- 



ponices, pp. 13, 14, 111, 134. 

 Ilipponyx Blainville, Diet. Sci. Nat., 1824, 32, p. 297; Man. Conch., 1825, p. 507 ; 



Sowerby, Genera, 1820, part 1, 1st ed., pi. 3 ; 1821, 2d ed., pi. 3; Bowdich, 



Elem. Conch, 1822, 1, p. 35, H. cornucopiae Defr. ; Swainson, Man. Malac, 



1840, p. 356. 

 Malluvium Melvill, Proc. Mai. Soe. Lond., June, 1906, 7, p. 82; type, Capulus 



lissus E. A. Smith. 



According to the proposed rule, which seems generally accepted by systematists 

 (i hough to tlie writer it appears not only unnecessary but objectionable), the 

 presence in nomenclature of Amaltheus precludes the use of Amulthca Schu- 

 macher. The name Hi])ponix was consistently used by Defrance and others, and 

 no derivation given in the original diagnosis ; the alteration, tliereforc, by Blain- 

 ville, five years later, was gratuitous, though not unnatural, according to the 

 Qotions of the time. 



Lamarck, ignoring Montfort's name of Capulus, evidently intended to include, 

 as Montfort did, both Ca|)ulus and species of Hipponix in his genus Pileopsis, 

 which thus becomes an exact synonym of Cai)ulus Montfort. Lamarck's name, 

 though not published, was evidently in use among the naturalists of the group 

 associated nt the Museum at Paris, and it was the discovery of the shelly support 

 secreted by the Hipponix cornucopiae of the faluns of Ilauteville, which led Dcfruuce 



