189 Midway Stage 75 



A IdricJC s original description. — "Shell small, oval, subgibbous, 

 striated, umbilicated; lines of growth numerous, more so on the 

 posterior half of the shell; spirals numerous, more closely set at 

 extremities and rather deeply cut, no pitting of the lines percep- 

 tible; posterior end rising above apex and partly covering the 

 posterior pit; the callus twisting into a saddle shape to join the 

 outer lip; spirals closely set where they run up into the um- 

 bilicus; pillar lip nearly straight. 



'''Locality. — Gregg's Landing, Alabama." 



The little specimen shown by fig. 5 has been broken poste- 

 riorly, and it is difficult to identify it specifically with any form 

 heretofore described. It is perhaps A. robustoides Aid., and is 

 from I mile west of Oak Hill, Wilcox Co., Ala. 



Specinie7i figured. — Paleontological Museum, Cornell Univ. 



CYLICHNA. 

 Cylichna meyeri, PI. 7, fig. 6. 



Syn. Cylichna nteyeri Aid., Bull. Am. Pal., No. 2, p. 6, pi. 2, 

 fig- 5- 



Aldrich's original description. — "Shell cylindrical, narrow, thin, 

 lines of growth prominent and closely set on the posterior, be- 

 coming obsolete on the middle part of the shell; spiral lines 

 numerous, closely set, impressed slightly and showing very 

 faintly through the lines of growth at the posterior end; a deep 

 excavation running from aperture at posterior over the apex and 

 connecting to outer lip which projects above the opening, a 

 strong rounded ridge marking the connection with the edge of 

 whorl; aperture narrow at posterior, widening at anterior, the 

 callus thickening but without a fold, umbilicus rudimentary. 



"■Locality. — Matthews' Landing, Ala. 



"Differs from C. dekayi Lea by its groove at posterior, the 

 sudden thickening of lines of growth and the absence of a fold. 

 Named in honor of Dr. Otto Meyer. ' ' 



The only specimen collected during the summer by us was 

 from I mile west of Oak Hill P. O., Wilcox Co., Ala. Bed 9 

 of Oak Hill section, p. 31. It is fragmentary and is shown by 

 fig. 6. 



Type. — Aldrich's Collection. 



Cylichna sp. , PI. 7, fig. 7. 



An imperfect specimen of perhaps C. galba Con. ; from Nahe- 

 ola, Tombigbee river, Ala. 



Specimen figured. — Paleontological Museum, Cornell Univ. 



