187 



lanceolata; ligamento parvo profundo. Denfes antici m 

 utraque valva breves, acuti; impressiones musculares dis- 

 tinctae. Long. 2 poll. 4 Im. Long. alt. crass. = 100 : 47 : 26. 



FMesodesma Gerniari* 



M. testa transversa, ovafo-trigona, valde inaequila- 

 terali, subvenfricosa, concentrice idque obsolete striata; 

 antice rotundato-truncata, postice producta, angidata; 

 umbonibus parvis subacutis; area lunidaque lanceolatis. 

 Cardo et impressiones itt in Mesodesmate donacilla, Desk. 

 Long. II lin. Long. alt. crass. = 100: 68: 42. 



Tenf€s Jftenhei* 



V. testa parvula, ovato-trigona, inaeqyilaferali, sub- 

 ventricosa, concentrice sidcata tenuiterque striata; umboni- 

 bus crassis prominulis subacutis, antrorsum incurvis; lunula 

 areaque lanceolatis; baseos media parte valde arcuata; 

 cardine valvulae dextrae dentibus tribus, sinistrae duobus. 

 Long. 7 lin. Long. alt. crass. = 100: 80: 58. 



MMonaop secttriformis* 



D. testa transversal, triangulari, siibaequilaterali, sub- 

 ventricosa, concentrice idque obsolete striata, antice pro- 

 ducta, rostrata, postice oblique truncata, basi aequaliter 

 arcuata; umbonibus parvis, subacutis, antrorsum incurvis; 

 margine cardinali antico arcuato, utrinque carina ab 

 umbonibus decurrente Ornat o; area anguste cordiformi; 

 lunula lanceolata; ligamento parvo. Dentes laterales duo 

 in utraque valva, cardinales duo in dextra, unus in sini- 

 stra valva. Long. 1 poll. 4 lin. Long. alt. cras.= 100: 60: 35. 



Edima MMausniannU 



L. testa ovata, convexa, concentrice striata sidcisque 

 radiantibus confertis ornata; cardinis margine recto; 

 auriculis parvis aequalibus. Long. 7 lin. 



Pateiia J^chtnidiih 



P. testa parvula, ovali, subconica, costis radiantibus 

 nu7nerosis et confertis, obtusis subfiliterque squamoso 

 imbricatis ornata, apice excentrico, obtusiusculo; margine 

 integro. Long. 4,25 lin. Long, crass. alt. = 100: 80: 60. 



