N0.1237. SYNOPSIS OF THE LUCINACEA—DALL. 807 



? Subg-enus Prolucina Dall, 1896. Type, Lucina prisca^ Hisinger, 

 Silurian. 



Shell compressed, arcuate, almost rostrate, the anterior portion 

 larger, the anterior adductor scars high, large, Lucinoid: the poste- 

 rioi' narrow, elongate. Teeth unknown. 



This group appears to be geiuiinely Lucinoid. though ParacyclaH 

 Hall, generall}' referred to the Lucinacea, should probal)ly heexchxded 

 from it, having no really Lucinoid features. 



EAST AMERICAN SPECIES. 

 PHACOIDES PECTINATUS Gmelin, 1792. 



St. Aug'ustine, Florida, to the West Indies and soutliward to Monte- 

 video, Uruguay, in shallow water. 



This is Tellina %)ectinata Gmelin. 1792, and Wood, 1815; Telllna 

 jmnaicensis Spengler, 1798; Tdl'ma scahM (Chemnitz) Wood, 1815; 

 Lucina jamaicensis Lamarck, 1818; Lucina mahra Gray, 1825; Lucina 

 {PJutcotdes) jmnaicen.sis Blainville, 1825; Lucina funwulata Reeve, 

 1850, but not Lucina pectinata C. B. Adams, 1852, nor Carpenter, 

 1857. 



PHACOIDES (HERE) PENSYLVANICUS Linnaeus, 1758. 



Cape Hatteras, North Carolina, south to and throughout the West 

 Indies and the continental shores adjacent, in shallow water, one- 

 fourth to 6 fathoms. 



This is Yemts pensyVvanica Linnaeus, 1758; Lucina peiinsylvanica 

 Reeve, 1850; Lucina grandinata Reeve, 1850, and Lucina speciosa 

 Reeve, 1850, but not L. speciosa Rogers, 1836. 



This well-known species is a very beautiful object when its perios- 

 tracum is perfect, but the differences in the latter upon which Reeve 

 founded one of his species are not constant in individuals from the 

 same locality. The oriental Lucina vi/rgo Reeve, which Tryon unites 

 with this species, appears to me to be distinct, but I have some sus- 

 picion that the L. ohliqim Philippi, 1850 (April, not of Reeve, June, 

 1850), may have been founded on a j^oung shell of this species. 



PHACOIDES (HERE) ADANSONII d'Orbigny, 1839. 



Senegal. Canaries; St. Thomas, and other localities in the Windward 

 Islands of the West Indies. 



This is the Lucina colwnbella of authors, but not of Lamarck, whose 

 type is a fossil of the French Miocene. It seems rare in the West 

 Indies. It is not the Lucina adanwnii Reeve (1850) = senegalemis 

 Reeve, in errata. 



^See Zittel, Textb. Pal. I, 1896, p. 408. 



