NEW SNAILS—PARODIZ 455 
name fulvescens. In the restricted sense, fulvescens is very similar 
to the form imitator Pilsbry of O. maracaibensis. 
Orthalicus longus Pfeiffer 
Orthalicus longus, Pfeiffer, Malakozool. Blatt, vol. 8, p. 16, 1861. 
Oxystyla longa Pilsbry, Manual of conchcology, ser. 2, vol. 12, p. 126, 1899. 
Type locality: Unknown; probably Michoacan, Mexico. 
Typical specimens (USNM 133564) from the Gulf of Tehuantepec 
have a short and solid form, remarkably plicate under the suture, and 
with strong riblike zones of growth. The variety boucardi Pfeiffer 
(Proc. Zool. Soc. London, p. 139, 1860) is even shorter, with dark 
and wide axial waved bands. Specimens USNM 408850 and 316352 
agree with the description, but there are also many specimens among 
these with wide white areas (as in Pilsbry, op. cit., figs. 20, 21, 24, and 
25 of pl. 20). The form strebeli (Pilsbry) is well differentiated, with 
two black bands on the last whorl; it may be a distinct species, but 
more observations are necessary as well as a study of its relationship 
with O. lividus Shutt. 
Genus Sultana Shuttleworth, 1856 
The species of Sultana have been referred formerly to Orthalicus, 
but inasmuch as the latter name is used for those species that have as 
type Bulimus zebra (Muller) (see Rehder, Nautilus, vol. 59, p. 29, 
1945) and which were placed under Oxystyla, we must take up again 
the name Sultana for these species grouped around the type Helix 
sultana Dillwyn, which previously was used for Orthalicus. Shuttle- 
worth originally designed Swltana as a division of Orthalicus (Notitiae 
Malacologicae, 1856) as follows: Orthalicus (p. 57): (1) Sultana 
(p. 58); (2) Zebra (p. 60); (3) Corona (p. 66); (4) Porphyrobaphe 
(p. 69). 
The name given by Shuttleworth to the genus type (in that case a 
subgenotype) was Orthalicus (Sultana) gallinosultana, a name derived 
from Bulimus gallinosultana Chemnitz. Chemnitz had adopted it 
from Favanne’s name “La Poule Sultana’’, but according to the Rules 
of Zoological Nomenclature we must consider the name of Dillwyn 
(1817), Helix sultana, as the first valid use. 
Zebra Shuttleworth and Ozystyla Schluter are synonyms of Orthal- 
icus. Strebel (Mittheil. Naturhist. Mus. Hamburg., vol. 26, p. 3, 
1909) used Zebra as a genus with Oxystyla as a synonym. Corona is 
another genus, of which the type, by subsequent designation of von 
Martens (Albers, Die Heliceen. . ., ed. 2, p. 226, 1860) is Helix 
regina Férussac. 
Thiele in his “Handbuch der systematischen Weichtierkunde,”’ 
vol. 2, 1931, did not make any mention of Sultana, but already in 
