- 561 - 



Section. Bellucina Dsll* 



PI-IA00IK;S tBEILUOi:.A) AOTinUS Dall. 



Phacoicles (Bellucina) actinus Dall, 1903, i'raus. V/agner Free liist. 

 3ei., Philadelphia, vol. 3, pt. o, p. 1385, pi. 52, 

 fi^^. 3. 



Dc script ion .- "Shell small, pluiap, somewliat inequilateral, 

 with moderately prominent, slightly decurved. he airs; smterior end 

 larger and more inflated; lijnule lanoeolate, somev/hat longer and 

 narrower iii the right valve, distinctly impressed; esciitcheon 

 impressed., almost lin^pr; disk VTith sixteen to cx^'^ctne-p roi^nded 

 radial ribs, entire and wider towards the hase, v.lth narrower deep 

 interspaces; co2icentrio sculpture of thin lamellae, v/ith much 

 wider interspaces, w'-^'ch are sopiewhat crenulate'^ or wave'5 by over- 

 ridi.iig the ribs and nipping into the radial interspaces; riorsal 

 areas large, sli?-htly impressed, with no radial sculntiire, the 

 concentric lam.ellae on ti-o nri,q-*:.=>rior area close-set, low, hnt 

 on the bounding rib and on a radial line near " " -aal margin 

 slightly elevated; hinge normal, delicate, internal margins minute- 

 ly crenulate. Alt. 4.5, " . "^.i", .-'am. -"^.O mm." 



"This little shell is near the typical Parvilx7.cina , but be- 

 gins to show the Bellucina characteristics i. its sculpt -.ire. 



