PROCEEDINGS OF THE NATIONAL MUSEUM. 179 



lire respectively 2 and 2.05 inches in length; placed side by side with 

 examples of F. Bupethithouarsii of same length it will be seen that the 

 former is generally of slenderer habit and a more graceful form, as 

 Tryon remarks. Fine mature specimens are often bluish-white inside 

 of the aperture. 



FUSUS CINEREUS, Reeve. 



Several specimens. La Paz (No. 32354, U. S. N. M.) ; San Lucas 

 Cove (No. 32353, U. S. N. M.). 



The three La Paz shells are small, of the four Cove specimens, two 

 are adult and two Juniors. Rather a rare shell in collections. The 

 National Collection contains examples received from other sources. 

 From Panama, collected by Bridges, several examples are registered 

 under the numbers ;)235() and 32357. It is found at other places in the 

 Gulf region. 



PISANIA (TRITONIDEA) INSIGNIH, Reeve. 



= Pisania imu/nis. Rkkvk. in S. I. ('lierk List 18B0, ;in<l Car]>enter's Mazatlan 

 Catalogue. 



Not common ; one specimen. San Lucas Cove (No. 40730, U. S. N. M.). 

 The Fisher example from the above locality is destitute of the longi- 

 tudinal ribs. Sta. Margarita Island (two beach shells), Albatrofts. 



PISANIA (TRITONIDEA) GEMMATA, Reeve. 



Three examples. Mazatlan (No. 40740, U. S. N. M.), Henry Edwards. 

 This species appears to be of infrequent occurrence. 



ENGINA CARBONARIA, Reeve. 



Three juniors, live shells. MulegeBay (No. 40088, U. S. N. M.). A 

 rare species. 



ENGINA CARBONARIA, Reeve; var. FUSIFORM IS, Stearns. 



One specimen, living, dredged. San Lucas Cove (No. 102020, IT. S. 

 N. M.). 



An elongated rather coarsely sculptured shell, quite deceptive at 

 first sight. Outer lip simple, as if immature; in strong contrast with 

 the ordiuary chunky, solid, heavy-lipped type of the species. 



MACRON ^ETHIOPS, Reeve. 



-\-M. Kellettii, Hinds; Stearns, Proc. Phil. Acad. Nat. Sciences, pp. 897,398, Pli 

 VII, figs. 3, 4, 5. 



Common; fine specimens. San Quentin Bay (Nos. 00074, 00075, 

 00070, U. S. N. M.). 



Numerous living examples of this variable shell were collected by Mr. 

 Fisher on ''mud fiats" in said bay, which indisputably connect the 

 above forms. Reeve's description and figure indicate an example in 



