1917.] 



NATURAL SCIENCES OF PHILADELPHIA. 



331 



Tellina (Arcopagia) elizabethae n. sp. PI. XXII, fig. 8. 



Flint Island, coll. by C. D. Voy. Type No. 80253, A. N. 8. P. 

 Also Haena, Kauai, W. A. and E. L. Bryan. Hilo, Hawaii, D. 

 Thaanum. 



The shell resembles T. scobinata (L.) but differs by the somewhat 

 more produced beaks, the slopes in front and behind them straight, 

 and inclined to form a smaller angle. The basal margin is less 

 deeply curved. The posterior angle of the right valve is more promi- 

 nent, and there is a broad concave depression before it. The scales 

 of the surface are about half as large as in T. scobinata, much lower, 

 and thicker, being lengthened granules rather than scales in the 

 lower parts of the valves. Between the scales there are fine concen- 

 tric striae as in the other species; as in that, also, the scales are notice- 



Fig. 33. — Surface of Tellina scobinata X 3. Fig. 34. — Surface of T. elizabethce X 3. 



ably larger in the right valve than in the left. The right valve is 

 slightly larger, projecting above the left. 



The shell is white, wath a few rays of irregular cinnamon spots 

 (which photograph abnormally dark). The interior does not differ 

 materially from T. scobinata. 



Length 60|, alt. 57, diam. 27 mm. 



Comparative views of the sculpture of T. scobinata (fig. 33) and 

 T. elizabethce (fig. 34) are from corresponding parts of the right 

 valves of each. 



Two valves from Haena are 61| and 81 mm. long. The specimen 

 from Hilo is young, 32| mm. long. At this stage the processes of 

 the .surface are more scale like. 



This species was recorded from Flint Island under the name 

 T. scobinata in these Proceedings for 1905, p. 292. Its distinctness 

 from that species was brought to my attention by Mrs. Bryan, for 

 whom it is named. It has been compared with a long series of 



