Head, Nantucket, and their Fossils. n 



*ANOMIA SIMPLEX d'Orb.(Anomia glabra, Verrill, 1875, p. 372), 

 Fairly common in the lower shell bed, No. 1. 



*MYTILUS EDULIS Linn. (Verrill, 1875, p. 372). 

 Found in both the lower and upper beds, Nos. 1 and 3, but it is 

 much more abundant in the latter. 



*MvTiLusHAMATUsSay=M.RECURVUS Raf. (Modiola hamatus, 

 Verrill, 1875, p. 372). Plate III figure 2. 



This is fairly common in the lower shell bed, No. 1, and is also 

 found in bed No. 2. During the last summer a complete specimen 

 with both valves together was found in the lower bed. 



*MODIOLUS MODIOLUS Linn. (Verrill, 1875, p. 374J. 

 Found in the upper beds. Nos. 3 and 4. 



*CRENELLA GLANDULA Totten. (Verrill, 1875, p. 372). 



Found in beds 1, 3, and 4. Those in the upper beds seem to be 

 larger and more common than in the lower one. This is the first 

 record of this species in bed No. 4. 



THRACIA TRUNCATA Mighels and Adams. (Verrill, 1875, p. 

 372). 



A few specimens referred to bed No. 3 by Verrill. 



PANDORA (CLIDIOPHORA) GOULDIANA Ball. (Clidiophora trilin- 

 eata, Verrill, 1875, p. 374). 



The record for this species is based upon a single valve from the 

 upper shell bed, No. 3, recorded by Verrill. 



PANDORA CRASSIDENS Conrad. (Wilson, 1905, p. 989). 

 Wilson's record for this species is the first from a formation 

 above the Miocene. The species is very close to the preceding one. 



*ASTARTE CASTANEA Say. (Desor and Cabot, 1849, p. 342). 



Abundant in the upper shell bed, No. 3. Also found by Mer- 

 rill in bed No. 2. 



*ASTARTE QUADRANS Gould. (Hollick, 1896, p. 9). 



This species occurs sparingly in beds 2 and 4. 



^STARTE UNDATA Gould. (Verrill, 1875, p. 376). 



A single worn valve of this species from bed No. 3 was found 

 by Verrill in the material he examined. 



CRASSINELLA MACTRACEA Linsley. (Verrill, 1875, p. 372). 



From the lower shell bed No. 1. Verrill records one specimen 

 of this small species. 



