192 PROCEEDINGS OF THE NATIONAL MUSEUM vol. os 



water on rocky bottom by John B. Henderson. Jr., while on the 

 Smithsonian-University of Iowa 1918 Expedition. A second smaller 

 specimen was collected on the same trip of! Payne's Bay Church, 

 Barbados, in 50 fathoms on sandy and stony bottom. 



Genus ARENE Adams, 1854 



ARENE RIISEI, new species 



Plate 19, Figures 17-18 



1878. Liotia riisei Dunker, Poulskn, Catalogue of West-India shells, p. 13 (nomen 



nudum). 

 1934. Liotia (Arene) riisri Johnson, Proc. Boston Soc. Nat. Hist., vol. 40, No. 1, 



p. 77 (nomen nudum). 



Shell small, solid, turbinate, white with deep rose splotches 

 and streaks. Whorls 4%, the first 21/4 comprising the nucleus, white, 

 smooth, the following whorls sculptured in the following manner: 

 Below the suture are four spiral rows of beads, the second being 

 larger than the others. Below this are four raised knobbed keels 

 with one row of beads between the first and second keel, and two rows 

 of beads between both the second and third, and third and fourth 

 keels. Below the fourth keel are two rows of small beads followed 

 by four rows of rather large beads. Around the umbilicus is a series 

 of large nodules and entering into the deep narrow umbilicus from 

 the columellar edge of the lip are two nodulose cords. In places 

 may be seen fine crowded axial threads, more or less effaced and 

 obscure. The interior of the aperture is ornamental with several 

 elongated denticles. 



The type, U.S.N.M. No. 42858, was collected at St. John, Virgin 

 Islands, and may very possibly have come from Morch. It measures : 

 Height, 4.7 mm.; breadth, 5.2 mm. 



This species is very near to Arene brasiliana Dall, from off Cape 

 Roque, differing, however, in that the spiral nodulose cords are more 

 numerous and the final axial threads less conspicuous. 



The name "Liotia" riisei. generally accredited to Dunker, has ap- 

 peared on lists for a great number of years but has apparently never 

 been described, a state of affairs I am here remedying. 



ARENE VANHYNINGI, new species 



Plate 19, Figtjbes 15-16 



Shell of medium size for the genus, depressed-conical, the main 

 portion of the upper surface of the whorls yellowish gray, the stout, 

 stellate peripheral keel white, and the under surface of the shell 

 grayish white. The nuclear whorls are missing, but the four re- 

 maining whorls have a conspicuous sutural canal, and the upper sur- 

 face of the whorls is obscurely axially rugose, the low broad folds 



