List OF SPECIES 295 
P. darwinu, Sowerby, described in this book. 
P. parva, Tryon, Nautilus V, p. 55; U. S. 
Ne Men exeVenp: 182. 
P. ovoidea, Gould, described in this book. 
Genus, Penitella, Conrad 
P. penita, Conrad, Arnold, p. 184. 
Genus, zirphaea, Leach 
Z. crispata, Linne, U.S. N. M. XV, p. 182. 
Genus, Parapholas, Conrad 
P. californica, Conrad, Figure 92. 
Genus, martesia, Leach 
M. intercalata, Cpr., U. S. N. M. VIII, p. 
545. 
Family, TERIDIDAE 
Genus, xylotrya, Leach 
X. setacea, Tryon, Nautilus V, p. 55. 
X. stutchburryi, Jeffrey, described in this 
book. 
X. fimbriata, Jeffrey, B. C. Bull. 1, p. 41. 
X. bipinnata, Jeffrey, B. C. Bull. 1, p. 42. 
Class, SCAPHOPODA 
Order, SOLENOCONCHIA 
Family, DENTALITDAE 
Genus, opentalium, Linne 
D. pretiosum, Nuttall, Nautilus X, p. 18. 
D. neohexagonum, Pilsbry, Nautilus XVII, 
p. 108. 
D. semistriatum var. semipolitum, Br. & 
Sby., Nautilus XIII, p. 28. 
D. rectius, Cpr., B. C. Bull. 1, p. 54. 
