E. F. Garcia 
A new species of Mitra 
2. It is proportionately narrower than the new species. 
The lectotype, and four specimens from the Gulf of 
Mexico (1 from Dry Tortugas, 2 from Louisiana, and 
1 from Texas) hâve respectively a width/length ratio 
(W/L) of 0.29, 0.30, 0.30 and 0.29. The type material 
of M. ulala ranges from 0.34 to 0.40, with an average 
of 0.37 W/L. 
3. Its surface sculpture is different. Mitra antillensis 
has a sculpture dominated by spiral éléments, which 
become unusually strong below the suture, 3 or 4 in 
earlier whorls, 6 or 7 on last whorl. In M. ulala the 
spiral sculpture near the shoulder is of equal strength 
on ail teleoconch whorls, and only two cords show by 
the body whorl suture of two adult specimens. 
Moreover, the First 5 whorls of M. ulala hâve strongly 
developed axial and spiral éléments (Figs. 3, 6, and 
11). Although some specimens of M antillensis from 
Barbados are more heavily sculptured on early whorls 
than those from more northern latitudes, they don’t 
show the heavily clathrate pattern of the new species. 
Finally, the number of spiral cords on Mitra 
antillensis continue to increase with each whorl, the 
lectotype showing about 10 on the penultimate whorl. 
Mitra ulala has 4 on early whorls and no more than 5 
on later whorls (Compare Figs. 3 and 18). 
4. The coloration of Mitra antillensis is rather 
subdued, from grayish-white to tan, sometimes with a 
suffused white band by the suture; it also has an 
olivaceous periostracum. Mitra ulala has a thin, 
transparent periostracum and a pattern of coloration 
not found in M. antillensis. 
Etymology. Named for the University of Louisiana at 
Lafayette, located in Acadia Parish, a French-speaking 
area of Louisiana. Although its official acronym is 
ULL, the jovial acronym “ULALA” has been used to 
refer to this institution. 
Acknowledgements 
I am very much indebted to Drs. Darryl Felder and 
Suzanne Fredericq, faculty members of the Biology 
Department at the University of Louisiana at Lafayette 
for inviting me to join them in their expéditions on the 
R/V Pélican , on which most of the specimens used for 
this article were collected. I am also very grateful to 
Mrs. Charlotte Thorpe, of Jacksonville Beach, Florida, 
tor allowing me to use her photograph of the animal of 
Mitra ulala, as well as for lending me the specimen 
for further photography. Dr. Harry G. Lee, of 
Jacksonville, Florida, has reviewed this study and 
considerably improved on its quality, I also would like 
to thank the following individuals for providing 
information and/or images of Mitra antillensis for this 
study: Linda Ward and Mignonette Doley Johnson, 
United States National Muséum; Dr. Fabio 
Moretzsohn, Harte Research Institute for Gulf of 
Mexico Studies, and Texas A&M University-Corpus 
Christi, and Dr. Mary Wicksten, Texas A&M 
University-College Station; and Mr. Frank Frumar, 
Kirkwood, Missouri, and Mr. Steve Kern, Key West, 
Florida. Most of the material for this study is based 
upon work supported by the National Science 
Foundation under Grant No. 0315995 and the RAP1D 
grant. 
REFERENCES 
Cernohorsky, W.O., 1976. The Mitridae of the world 
Part I. The subfamily Mitrinae. Indo-Pacific 
Mollusca 5(17): 273-528. September 28. 
Garcia, E. F. 2000. Surprising new molluscan records 
from Louisiana and the northwestern Gulf of 
Mexico. American Conchologist 28(3):5-6. 
Garcia, E. F. 2002. More discoveries from a collecting 
expédition off the Louisiana coast. American 
Conchologist 30(l):6-8. 
Garcia, E. F. 2007. A new species of Cosmioconcha 
(Gastropoda: Columbellidae) from the northern 
Gulf of Mexico. Novapex 8(2): 43-46. 
Garcia, E. F. 2008. An extension of the genus 
Spinosipella (Bivalvia: Verticordidae) in the Gulf 
of Mexico. American Conchologist 36(3): 8-9. 
Garcia, E. F. 2010. A géographie extension for two 
species of Favartia (Muricidae: Muricopsinae) 
from the western Atlantic. American Conchologist 
38(3): 10-11. 
Garcia, E. F. & Fl. G. Lee. 2002. Report on molluscan 
species found in the offshore waters of Louisiana, 
including many extensions of known range and un- 
named species. American Conchologist 30(4): 10- 
13. 
Garcia, E. F. & H. G. Lee. 2003. Report on molluscan 
species found in the offshore waters of Louisiana, 
including many extensions of known range and un- 
named species. II. American Conchologist 
31(1 ):26-29. 
Figures 12-20 
12-15. Mitra ulala n. sp. Paratype 9 CMT, 28°05.552’N, 91°00.82'W, i63-64 m, length 23.7 mm, width 8.7 mm. 
(Photograph of Fig. 15 by Charlotte Thorpe). 16- 20. Mitra antillensis Dali, 1889. 16. Lectotype, USNM 62103, 
36 mi SE oi Cape Lokout, North Carolina, 336 m, length 81.0 mm, width 40.0 mm (Photo crédit: Mignonette 
Doley Johnson). 17-18. EFG 22261, Louisiana, 27° 49 N 92° 53.5 W, 75-85 m, length (approx.) 48 mm, width 
14.5 mm. 19. TCWC 4- 2600, Texas, Alaminos Station 72-A4, 28°34.7’N, 92° 05.5'W,39 m, length 59.9 mm, 
width 17,1 mm. 20. FF, 16 mi. SW of Key West, Florida, 167 m (Photo crédit: Steve Kern). 
60 
