THE NAUTILUS. 
41 
Subgenus Symmorphomadra Dull, 1894. 
Teeth of Madrotoma, ss.; hinge of Spisula. 
Spisula (Symmorphomaotra) falcata GUI., 1850. Cornox, Br. Col. to San Pedro, 
Cala. 
Genus MUL1NIA Gray, 1837. 
Mulinia pallida Brod. A Sby., 1829. Panama to C. St. Lucas. 
+ J/. donaciformis Gray, 1839, not of Reeve, 1854 ; -j -M. angulata 
(Gray) Reeve, 1854; -\~M. carinulata (Desh.) Reeve, 1854, (young 
shells) ; ?— 31. goniata Deslu, 1854, (unfigured and insufficiently 
described) ; -j-il/. bistrigata Morch, 1862. 
Mulinia modesta Dali, 1894. Guaymas, Mexico. 
-j -M. carinulata Cpr. non Deshayes. 
Mulinia Gabbi Tryon, 1S69. Lower California. 
Mulinia coloradoensis Dali, 1894. Gulf of California, at Guaymas and thence to 
the Colorado-mouth. 
Mulinia coloradoensis var. acuta Dali, 1894. Colorado river-mouth, Gulf of Cali¬ 
fornia. 
Mulinia Bradleyi Dali, 1894. Panama, Bradley. 
Genus GNATHODON Gray, 1831. 
I 
Subgenus Rangianella Conrad, 1863. 
Gnathodon (Rangianella) mendicus Gould, 1851. Estuaries, Gulf of Cal. 
-\-G. trig onus Petit, 1853 ; -\-G. truncation Petit, 1853. 
Subfamily Pteropsin^e. 
Genus LABIOSA (Schmidt) Holler, 1832. 
Labiosa anatina Spengler, 1802. West Mexico. 
r L. peUucida Schum., 1817 ; -\-M. cyprinus Gray, 1828 ; -j -L. 
papyracea (Lam.) Sby., 1824. 
Subgenus Raeta Gray, 1853. 
Labiosa (Raeta) undulata Gould, 1851. San Pedro, Cala., to Panama. 
-fi-R. calijornica Melvill, as of Sowerby. 
