-4 23 - 



"IfferenjeL; 1 -'<. tiQxil-gtvre. It is v exv 



t/ 



close to the liaxito Domin?rian J,, amlnense Sail (1], but that 



(1). ^iTaxib. ./agi-er . rec liiat. 3ci., x-'hilc.ciel-ohia, vol. 3, ot. 

 5, p. 1101- , pi. 48, fi,-::. 5, 1900. 



speoies is larger, with higher and less gvrate uralDones, less curv- 

 ed carina, more numerous ribs, which posteriorly- do not become 

 conspicuously? wider. 0_. spate ticiaii Jail i' 2 ) , an Oalr Crove form, 



(.?). idem., vol. Z , ,;t. 5, pp. 1105-1106, pi. 48, fi.- . , IDCO. 



differs, b;^ having slightly- higher and narrow umbones, m.ore numerous 

 ribs, wtiich on the bor!y of the shell are lov.-er and broader and the 

 interspaces between them shallovver and narrower; in addition, it 

 is apparently without nodules. In the Johns Hopkins University? 

 collection of material from ■^"'''■^ '-•-o-^.:-. ^-ip ^ ^ ,-,-<^ Panama (") is an 



(-), Collected 'by Dr. Marcus I. Goldman. 



undescribed Trigoniocardia which is rather c Igsel^'- relate"; it 

 is narrov/er, the carina is romided and straight, -sterior 



area less sharply impressed, th'^ -.'t>, ■ ■•■■lOTe nu'ieroiis (eleven or 

 twelve on the body and seven or eight on ' lor area) and 



the inters-caces narrower and shallower. 



