No. 414.] MORTH-AMERICAN INVERTEBRATES. 495 
Holothuria. 
Deposits tables and very numerous small irreg- 
ular perforated plates . . . H. atra Jäger 
Dark brown, 300 mm.; shanty: distributed in the tropics ; 
Papille on dorsal, Finds 
pedicels on ven- - 
tral surface. Deposits tables and two kinds of ait mm 
buttons H. rigida Sel. 
Olive Mis 7o mm.; Florida "e Zanzibar and Society 
|. Islands). 
Papillz on both dor- ( Disk of tables with a smooth margin 
sal and ventral H. impatiens (Forsk.) 
surfaces; no pedi- Dark purplish or grayish, more or less blotched with darker ; 
cels; apes j 150 mm.; very widely distributed in the warmer seas; Flori: 
kind of perforated Disk of tables with twelve prominent horizontal 
button teeth on margin o. TI E Prines Bel 
L Dark brown; 120 mm.; Florida. 
THE MOST IMPORTANT PAPERS DEALING WITH THE 
SHALLOW-WATER HOLOTHURIANS OF NORTH 
AMERICA ARE AS FOLLOWS. 
AYRES, W. O. Notices of Holothurie. Proc. Bost. Soc. Nat. Hist. 
Vol. iv. 1851-54 
BRANDT, J. F. Prodrosds descriptionis animalium ab H. Mertensio 
observatorum. Fasc. i . 
CLARK, H. L. The S nMptes of the New England Coast. Bull. U..S. 
Fish Comm. 18 
Duncan, P. M., and MOORS W. P. A Memoir on the Echinoderms of 
the Arctic Sea to the West of Greenland. 1881 
GEROULD, J. H. Anatomy and Histology of Caudina arenata. Proc. 
Bost. Soc. Nat. Hist. Vol. xxvii. 18 
KINGSLEY, J. S. Contributions to the Anatomy ‘of Holothurians. Mem. 
Peabody Acad. OF O0. Vol L No. s. 
Lampert, K. Die Seewalzen. 1885. 
Lupwic, H. Revision der Mertens-Brandt'schen Holothurien. Zeitschr. 
SJ. wiss. Zool. Bd. xxxv. 1881. 
PouRTALEs, L. F. On the Holothurie of the Atlantic Coast of the 
United States. Proc. Am. Ass. Adv. Sci. 5th meeting. 1851. 
SELENKA, F. -Beitráge zur Anatomie und Systematik der Holothurien. 
Zeitschr. f. wiss. Zool. Vol. xvii. 1867. 
