ball: mollusca and brachiopoda. 315 



Antistreptus magellanicus Dall. 



Plate 15, figure 14. 



Antistreptus marjellanicus Dall, Proc. U. S. Nat. Mus., 1902, 24, p. bZ2. 

 Glypteuthria contraria Strebel, Schwed. Sudpolar Exp., 1908, 6, 1, p. 29, pi. 1, 

 figs, 4 a-c. 



U. S. S. "Albatross," station 2773, near the eastern entrance to the Magellan 

 Straits, in 10 fathoms, sand, temperature about 50° F. U. S. N. Mus. 96,190. 

 Also at station 2777, in the strait, in 20 fathoms, gravel. North Argentine coast 

 in latitude 37° 57' S., in about 50 fathoms, sand. 



Strebel's specimens, of which he gives an excellent figure, are somewhat more 

 mature than ours, but did not contain the animal, so that a knowledge of the 

 operculum is still a desideratum. 



Streptodon'ta. 



Ptenoglossa. 



Scalidae. 



EPITO^^IUilI BoLTEx. 



Scala (anonymous) Mus. Calonnianum, 1797, p. 23 ; tjpe. Turbo scalaris Linn^. 

 Epitonium (first section) Bolten, Mus. Boltenianum, 1798, p. 91 ; first species, Turbo 



scalaris Gmelin. 

 Cyclostoma Lamarck, Prodrome, 1709, p. 74 ; sole example, Turbo scalaris Linne'. 

 Scala Dall, Bull. Mus. Comp. Zoul., 1889, 18, p. 299. 



Twenty years ago I discussed the synonymy of this family, showing that if a 

 diagnosis is required to validate a generic name there is no escape from accepting 

 the name of Cyclostoma for the wentlcfraps. I proposed to take the anomymous 

 name usually, at that time (but wrongly as wc now know), ascribed to Hum- 

 phrey. Since then much has been done to clarify the rules governing these 

 matters, and it is generally conceded that an anonymous pamphlet with no osten- 

 sible publisher cannot be cited in nomenclature for valid generic names. The 

 next name in order is Epitonium of Bolten, of which the first section is identical 

 with Scala. I have decided to adopt this, as to further oppose the change would 

 only put off the evil day, and it is best to get it over. 



Fcriniiioscala Dall, nov. 



Whorls in contact, turritclloid, reticulate, with a single heavy varix for the 

 fully mature slicll ; base with no uuibilicus, a basal disk lu-escnt ; type, Sca/a 

 ferminiana Dall. 



