112 BULI.ETIN 31 112 



par les lanielles concentriques. Elle differe de la L. bisculpta Me}-er avec 

 laquelle elle a quelque d'analogie par le epaisseur de la coquille, les 

 lamelles regulieres etc. (Coll. tnon Cabinet.) 



This we regard as some extraneous form that de Gregorio 

 had mixed with his Claiborne matter while working up his 

 "Monograph". Dall seemed inclined at first to regard it as syn- 

 onymous vjiihpomilia (seep. 1364, III, Trans. Wag.) and later 

 suggested its possible relationship to claibornciisis (see p. 1374, 

 op. cit. ) No such form has shown up in any of our Claiborne 

 collections. 



Lucina hamatus Dall, PI. 37, Fig. 24. 



Phakoides {Here) hamatus Dall, Trans. Wa6. Ill, 1903, p. 1364, pi. 

 50, fig. 9- 



DalPs original description. — Shell small, plump, with small, high, 

 prosogyrate beaks ; dorsal areas strongl}' emphasized by an impressed sul- 

 cus on their ventral margins which terminates distally in an indentation of 

 the margin which, as it were, loops up the line of the profile ; surface sculp- 

 tured with incremental lines and regularly spaced, rather distant, slightly- 

 elevated and recurved concentric lamellse; lunule small, cordate, deep, over- 

 shadowed by the gyrate umbones ; escutcheon none ; anterior end of the 

 valve below the anterior dorsal area projecting, subangular ; hinge and ad- 

 ductor scars normal. Height 13.6, length 14.0, diam. 10. o mm. 



Eocene of the lower bed at Claiborne Bluff, Ala. ; Lea. 



Our various collections from the base of the Bluff have un- 

 fortunately brought to light nothing corresponding to this species. 

 The credit of its collection Dall gives to Lea, bitt, so far as we 

 are aware, none of lyca's fo,s,sils were from the basal (St. Maurice) 

 bed. It is within the range of mere possibility that this is a 

 pathologic specimen of L. claibor7ie7isis, a very common species 

 at this horizon and localit}', and with surface markings agreeing 

 well with the characters enumerated above. 



Various stocks of small Lucinas. 

 In taking up the smaller Lucinas of the St. Maurice and 



