MUSEUM OF COMPARATIVE ZOOLOGY. 243 
EXPLANATION OF PLATES. 
Tam indebted to Prof. A. E. Verrill for permission to use in these plates some 
of the drawings prepared from specimens in the collection of the U. S. National 
Museum, by Mr. J. H. Blake. 
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11. 
16. 
11, 
PLATE I. 
Mangilia eritima Bush (Mangilia quadrata. Reeve, var. quadrata Dall). 
Front view; X 6 diameters. Off Cape Hatteras, N. C., U. 8. F. C. 
Station 2280, in 16 fathoms, 1884. Page 240. 
Mangilia leuca Bush. Front view; X 3 diameters. Nucleus and outer 
lip broken. Page 209. 
Murex (Pteronotus) pygmeus Bush. Dorsal view; X about 2 diam- 
eters. Page 213. 
The same. Front view; X about 2 diameters. 
Pleurotoma (Drillia) amblytera Bush. Front view; X about 2 diam- 
eters. Page 208. 
. The same. Side view of the body whorl; X about 2 diameters. 
Nucula Verrillii Dall (Nucula trigona Verrill). Interior view ; X 6 diam- 
eters. Off Chesapeake Bay, U. S. F. C. Station 2229, in 1,423 fathoms, 
1884. Page 240. 
The same. Exterior view; X 6 diameters. 
Limopsis minuta (Phil.). Interior view; X 8 diameters. South of 
Martha’s Vineyard, U. S: F. C. Station 2183, in 195 fathoms, 1884. 
Page 235. 
Yoldia callista Bush. Interior view; X 12 diameters. Page 293. 
The same. Exterior view; X 12 diameters. 
Skenea lirata Verrill.(Adeorbis supranitidus Wood, var. Orbignyi Fischer, 
t. Dall). Front view; X 12 diameters. Off Cape Hatteras, N. C., 
U. S. F. C. Station 2278, in 16 fathoms, 1884. Page 240. 
The same. View of base; X 12 diameters. 
Astyris pura Verrill. Front view; X 6 diameters. South of Martha’s 
Vineyard, U. S. F. C. Station 894, in 365 fathoms, 1880. Page 240. 
Trophon abyssorum Verrill. Front view; X 3 diameters. Off Cape Hat- 
teras, N. C., U. 8. F. C. Station 2115, in 843 fathoms, 1883. Page 240. 
Trophon abyssorum, var. limicola Verrill. Front view; X 9 diameters. 
South of Martha's Vineyard, U. S. F. C. Station 2084, in 1,290 fath- 
oms, 1883. Page 240. 
Trophon Verrillii Bush. Front view; X about 2 diameters. Page 214. 
Scala leptalea Bush. Front view; X 3 diameters. Off Cape Hatteras, 
N. C., U. S. F. C. Station 2277, in 16 fathoms, 1884. Page 240. 
