^sY'] PROCEEDINGS OP^ THE NATIONAL MUSEUM. 397 



six and a half Avliorls; wliorls cov(?rcd witli obtusely rounded and 

 rather coarse nodules; of these the peripheral series is the strongest 

 and the next preceding, somewhat less prominent, while the other 

 girdles of nodes are still less conspicuous. The peripheral is closely 

 followed by a parallel series just below, and the base is marked by 

 succeeding rows of less prominence. The aperture is rounded-ovate 

 and of a dark chocolate color; columella broad, somewhat excavated 

 and produced below. Exterior dull chocolate-brown above, paler be- 

 low, with still paler nodules. 



Altitude, 7.50; latitude, 5 millimeters. Comparison with the Antil- 

 le.an and Indo-Pacific forms in the National collection indicates its 

 nou identity with any heretofore des(;ribed. 



Wimmer's list includes two species, namely (Hamus) lemniscatus 

 Phil, and trochoides Gray, the first of the group reported as occurring 

 here. The form herein described does not agree with either of the 

 species catalogued by Wimmer; it is not so acutely conical as trochoides 

 Gray, which Tryon includes in the synonymy of noduloHWi Gmel., and 

 the columella is broader and more produced at the base (posteriorly) 

 than in lemniscata Phil., an Indo-Pacific form, regarded by Tryon as a 

 synonym of miliaris. If Wimmer's determination is correct, which I 

 am rather inclined to question, then three species of Teetarius are 

 found in the Galapagos. Dr. Jones detected a single individual of 

 this group at Manta, Ecuador, which I have listed with the Jones 

 shells by the name of Teetarius atyphus, the first example of this 

 genus from the West coast of the American continent. This is not 

 referable to either of the species (catalogued by Wimmer or to any 

 others of the group, which is largely represented in the National col- 

 lection. 



Family IUSSOID.^5. 



Genus RISSO Fr('-,miiivillc. 



Subgenus ALVANIA Risso, 



81. Alvania reticulata Cpr. 

 not R. reticulata Mont., 

 ^ 11. Carpenteri Weink., (Tryon). 



Beach specimen in ftur order. 



Indefatigable Island, one example (Mus. No. 122127). 



Described by Cari)enter from Neeali Bay, Pnget Sound specimens 

 in the Ann. & Mag. Nat. Hist., Vol. xiv, 3d series, and agreeing with 

 examples in the National Museum identified by Carpenter. 



Wimmer records a s])ecies of Alvania without name; possibly either 

 this or the following, 



82. Alvania aequisculpta Cpr. 



Beach example 



Indefatigable Island (Mus. No. 122126). The single specimen col- 

 lected by the Albatross was fortunately sufficiently perfect to admit of 



