rSOHNOCHT] '.'! 



Tin- loot projects foruard, conceal! MI: tin- lim.j tV-.m bttN :itli. 



I. . 02XBPX4 GUfl Carpenter, n. ip, I'i 



Shell lar^e, elongated. moderately elevated; greei 



earthy-brown ), luit \\ lien- eroded at tin- heaks it i^ pink. In! 

 pink, witli a blue spot at tin- juiral -inn-. Lateral an-as much 

 raised, having acute radiating rilil. : 

 enlly *mnnih, but microscopically -rauulated, BOtQetitiK 



faint longitudinal strice at the jogum, Front */ope of th< 



i'<i /re en/icdi'f ; yirdle densely beset with short bristles, <, <> vet- 



1'i'tll nfJiCrt. 



The entire surface is very densely miero-eopieally granulated, 

 where not eroded. The lateral areas have fine aeute radii and 

 often the back edge of each valve is crenulated by oblique, sharp, 

 little folds. The color is often varied by darker little flame- on tin- 

 central areas. The posterior valve is large and depressed. 



The sutural plates are large, the sinus deep and angular. Inser- 

 tion plates having in anterior valve 9, central valves 2 or 3, j> 

 rior valve 10 slits. Teeth sharp and thin in posterior and central 

 valves, but blunt and bi- or trilobed in anterior valve. Eaves wide. 

 solid, light blue-green colored. 



Length 82, breadth 36 mill. 



Length 89, breadth 41 mill. 



Santa Barbara, California, t<> Magdalena Bay. 



Maugerella conspicua CPR. MS. OROUTT, Proc. U. S. Nat. Mu>. 

 1885, p. 544. 



This species may be separated from /. amor by its unsculptund 

 central areas and velvety rather than scaly girdle. It is more 

 closely allied to I. magdalenensis and may, indeed, prove tointergrade 

 with that species; but in magdalenensis the front valve is scar 

 concave in front, the sides of the central areas have a honeycomb 

 sculpture, and the girdle is very finely sc<ilij, not re I ret;/. 



A specimen before me from Magdalena Bay is ferruginous 

 brown, the central areas are more rugose, and the -i/. i- unalfer, 

 length 45, breadth 20 mill. Another specimen has the central 

 areas sculptured like /. acrior, but less strongly; the Birdie being 

 bristly, however, as in typical eow.<;m-H"-<. S:m Diego may be 

 regarded as the center of distribution of this 



