1856.] 315 



SPONDYLUS. 



Spondylus Estrallensis. Obtusely ovate ; both valves ventricose ; ribs 17, not 

 very prominent, rounded, rugose ; valves with radiating striae. 

 Locality. Estrella valley. Mr. Antisell. 



DOSINIA, Scopoli. 



1. Dosina longula. Regularly ventricose, inequilateral, longitudinally oval ; 

 margins and base regularly rounded ; summit prominent; buccal margin more 

 obtusely rounded than the anal. Length 1 l-5th inch. 



ioc7%. Monterey, Cal. Dr. Newberry. 



2. Dosinia alta. Obtusely subovate or suboval from beak to base ; posterior 

 margin curved, profoundly oblique ; base regularly and rather acutely rounded ; 

 summits prominent, oblique ; surface marked with numerous fine, concentric, 

 impressed lines; beaks medial. Height 4 inches. 



iocaZeV?/. Monterey, Cal. Dr. Newberry. 



LUTRARIA. 



Lutraria transmontana. Longitudinally ovato-triangular, inequilateral, thin ; 

 anal side subcuneiform ; surface concentrically indented , umbo irregularly 

 plicated. 



1 oealily. Ranche Triumpho, near Los Angelos. Mr. Antisell. 



SCHIZOPYGA, Conrad. 



Bucciniform ; columella concave, plicate ; lower part of body voluticn deeply 

 channelled, the channel emarginating the columella. 



Schizopyga Californiana. Volutions rounded, having revolving ribs and longi- 

 tudinal furrows, giving the ribs a nodulous character ; basal excavation pro- 

 found. 



Locality. Santa Clara, Cal. Dr. Newberry. 



TAMIOSOMA, Conrad. 



An elongated tube, apparently entire, porous and cellular throughout its sub- 

 stance; interior filled with numerous irregularly-disposed vaulted cells con- 

 nected by longitudinal slender tubes, funnel-shaped beneath ; aperture resem- 

 bling that of Balanus. 



Tamiosoma gregaria. SubquaJrangular, elongated, longitudinally furrowed 

 and striate, and having fine, undulated, transverse lines ; mouth small, oblique ; 

 upper part of the tube oblique, deeply indented or Balaniform, and coarsely 

 striated longitudinally. Length 8 inches. 



Locality Monterey Co., California. A. S. Taylor. Growing in clusters like 

 Balani. No sutures, indicating separate valves ; cells very thin plates, convex 

 surface downwards. 



Echinoderms. 

 ASTRODAPSIS, Conrad. 



Suboval, depressed; ambulacral areas elevated or ridged; ambulacra nearly 

 straight, widely open at the extremity; mouth central; anus submarginal, 

 beneath ; radiating grooves as in Laganum. 



Astrodapsis Antiselli. Pentangular, suboval ; ambulacral ridges rounded on 

 the back, straight and oblique on the sides ; interambulacral areas profoundly 

 depressed, angulated in the middle ; point of divergence of the ambulacra de- 

 pressed below the level of the ridges, not quite central, but anterior to the 

 middle ; anus small, almost marginal. Lengthlf inch. 



Locality. UoniQX&y Co., Cal. A. S. Taylor. 



