IG CRETACEOUS PELECYPODA 



2. Teredo crassula, Stoliczka, PI. I, Pig. 2. 



T. testa glohulosa; nmhonihiis j)rominentihiis, incurvatis ; valvis in areis me- 

 dianis subtile arciiatim slriatis ; auricula anteriori siibkeoiyata, parva ; posteriori 

 magna, poslicc roluiidala, ejusdem margine superiori recto. Tuhulis mhloirAgatis, 

 crassis, irreijulariter tortis, subcylindraceis, antice clausis, leviter rotundatis sed uou 

 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 he 

 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 striae, and two 

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

 The anterior aviricle is rather small and the striaj on it minvite ; the posterior com- 

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

 than in the centre of the valves. 



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



Formation. — Ootatoor group. 



3. Teredo torulosa, Stoliczka, PI. I, Eig. 3. 



T. testa transversaUter ovata, injlata ; umbonibus incurvatis; hiatu antico 

 magno, late triangulari, postico sub-elliptieo, angustato ; auricula antica moderata^ 

 triangulari, substriata ; area centrali magna, tinea impressa angustissima ah umbonibus 

 ad peripheriam oblique decurrente divisa, subtilissime arcuatim striata; auricula 

 postica angusta, sulco lata ab area centrali separata, snbrugosa. TubuUs cijlindraceis, 

 temdbus, varie tortis, transversaUter minute rugatis ; terminationibus anticis clausis, 

 clavatis ac jilU'S minusve inflatis. 



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

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

 inflated or clavate anterior terminations are among the recent teredinin^ more 

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

 to their size rather oval, on the sm-face very minutely striated ; the anterior am-icle 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. Argoncnsis. 



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

 JParapholas mersa. 



Formation. — Ootatoor group. 



