140 PKOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



Pinos, near Monterey. It is found mostly in masses of Fucus attached 

 to rocks between tide-marks, and it is often found at low tide at a con- 

 siderable distance from any water, kept damp by the masses of algse. 

 Sometimes a dozen of them can be shaken from a bunch of algae 

 attached to a dry rock. It is, like the species of XipMsier, very active, 

 moving- over stones or sand, and showing less anxiety about the pres- 

 ence of its native element than any other fish known to us. The very 

 numerous typical examples are all of nearly the same size as the one 

 measured below. It probably does not attain so great a size as Apo- 

 dichthys Jiavidus. 



AVe have little doubt that Professor Gill is right in uniting Jiavidus 

 Girard, virescens xVyres, and sanguineus Gill as one species. Whether 

 inornatus Gill is different or net we do not know. At any rate, its num- 

 ber of fin- rays (D. XO, A. 38) will separate it from A. fucorum. 



Table of measurements. 



A. fur cor um. A. Jiavidus. 



Extreme lenjrth, in inclies 



Length to base of caudal = 100 



Body, greatest depth 



Hea'd: 



Length 



Distance from snout to nape 



Dorsal, distance from snout 



Anal : 



Distance from snout 



Height of spine 



Length of pectoral 



Dorsal rays 



Anal rays 



Monterey, Cal., A]jril 7, 1880, 



OESCRIPTIOX OF A TERY^ liARCE FOS!>iIIi OAiSTEROPOD FROm 

 TUG STAT£ OF PUFBI^A, ]TI£XICO. 



By C. A. IVHITE. 



The United States National Museum has received from Mr. H. B. 

 Acton, through the Hon. J. W. Foster, United States minister to 

 Mexico, the very interesting fossil shell which is described in the follow- 

 ing paragraphs. Mr. Acton says, in a letter accompanying the specimen, 

 that it was obtained from the strata upon which are located the Zapo- 

 titlan Salt Works, which works are about six miles south westward from 

 the town of Tehuacan, in the State of Puebla, Mexico, and about 115 

 miles inland from the Gulf coast. He gives the elevation of that local- 

 ity as G,oOO feet above the level of the sea. 



Only one example of this species has Jbeen received, and it is accom- 

 panied with examples of no other species. Fragments of the imbed- 

 ding rock, which is a dense bluish limestone, have been carefully exam- 

 ined, and although they w^ere found to contain numerous fragments of 



