J 



16 CEETACEOUS PELECYPODA 



2. Teeedo crassula, StoUczJm, PI. I, Eig. 2. 



T, testa globulosa ; umbonibus prominentibus, incurvatis ; valvis in areis me- 

 dianis subtile arcuatim striatic; auricula anteriori sublcevigata, parva ; posteriori 

 magna^ postice rotundata^ ejusdem margine superiori recto. Tubulis sublcemgatis, 

 crassis, irregulariter tortis, subci/lindraceis, antice clausis^ leviter rotundatis sed non 

 tumescentibus. 



The tubes of this species are in proportion thicker than those of the previous 

 one, and are generally slightly bent or undulating ; their surface appears to be 

 nearly smooth. The anterior end of the tubes is not thickened, but gradually 

 rounded and closed. 



The shells are nearly globular, perhaps a trifle higher than thick ; the outer 

 surface of the median area is covered with very fine angularly bent strise, and two 

 fine grooves run along the greatest convexity from near the apex to the periphery. 

 The anterior auricle is rather small and the striae on it minute ; the posterior com- 

 paratively large with a straight upper margin, and with the strige also much finer 

 than in the centre of the valves. 



Locality, —In fossil wood, impregnated with calcareous matter, at Ootatoor. 

 ' Formation, — Ootatoor group. 



3. Teeedo TdMiLOSA, StoUczla, PL I, Eig. 3. 



T, testa transnersaliter ovata^ inflata; umbonibus incurvatis; hiatu antico 

 magnOi late triangularis postico sub-elliptico, angustato ; auricula antica moderata 

 triangularis substriata ; area centrali magna, linea impressa angustissima ab um>bombus 

 ad peripheriam oblique decurrente divisa, subtilissime arcuatim striata; auricula 

 postica angusta, sulco lato ab area centrali separata, subrugosa, Tubulis cylindraceis 

 tenuibus, varie tortis, transversaliter minute rugatis ; terminationibus anticis clausis 

 clavatis ac plus minusve inflatis. 



The form of the tubes of this species greatly resembles that of Teredo Argonen- 

 sis, being thin, sub-cylindrical, and with the anterior ends somewhat inflated. These 

 inflated or clavate anterior terminations are among the recent terjeiuninjE more 

 commonly observed in KupJius than in Teredo proper. The valves are in proportion 

 to their size rather oval, on the surface very minutely striated ; the anterior auricle is 

 of moderate size, the posterior one narrow, slightly rugose and separated from the 

 central area by a shallow but broad groove which runs from under the umbones 

 towards the posterior margin. The position of this groove, as well as the much less 

 distinct one on the central area, and the fine striation readily distinguish this 

 species from T. Argonensis, 



Locality. — Moraviatoor, found boring in wood with Martesia tundens and 

 Tarapholas mersa. 



Formation. — Ootatoor group. 



