OF SOUTHERN INDIA. 15 



tubular. The same is most likely the case with Miiller's Gasf. voracissima from the cretaceous beds 

 near Aachen. 



Meek in his Cheek-list of cretaceous fossils of North America (Smithson. IMiscell. Coll., No. 177, 

 p. 16,) quotes six species of Teredo,- T. calamitoides, contoria, glohosa, irrefjnlaris, selUfoniul, 

 tibialis,- and the previously mentioned PolartJius americanus. 



I have to record from South India four new species of teredixin.-e which, so long as the 

 palettes are unknown, may be described under the generic name of Teredo ; this will raise the total 

 number of cretaceous species to about 26, though liardly more than one-half of them are sufficiently 

 certain as belonging to the sub-family ; in uo instance are the palettes satisfactorily known. 



I.* TEREDO, Sellms, 1732. 



1. Teredo partita, StoUczka, PI. I, Fig. 1. 



T. testa glohosa, cequcditer lata quam alta, striis ad medium converffentibus snb- 

 tilissimis ornata ; umJjonihus distinctis, incurvatis ; auricula anteriori magna, stihan- 

 (jidata, supra ad marginem iiicrassatu ; Idatu anteriori mediocri, fere triangnlari ; 

 auricula postica angustata, ah corpore testes sulco profunda separata. Tuhula cyliu- 

 dracea, in junioribiis varie torta, crassiusctila, in adidtis sub-recta, transfer saliter crasse 

 ac mimerose riigata, intus costa mediana ventrali, temd ac rectiuscida instructa. 



The sub-cyliudrical form aucl the numerous transverse rngations appear to he 

 characteristic for this species. The young shells are, as usually in living forms 

 found boring in all directions through the wood ; they are considerably thickened 

 at the anterior end, but othermse of much the same thickness throughout. The 

 tubes of older specimens are placed parallel to the fibre of the wood ; the cast 

 exhibits a distinct furrow on the ventral side of the tube, corresponding to the lower 

 thickened terminations of the valves. Such a furroAv is often to be seen on livin"* 

 specimens of Teredos, and is produced by a slight rib ou the internal side of the 

 tube. The two valves, when closed, are almost perfectly globular, the striations on 

 the outer surface being extremely fine, so much so that they are often hardly trace- 

 able. The anterior am-icle is comparatively large, occupying nearly half the height 

 of the shell ; it is anteriorly sub-angular, and on the upper side in front of the 

 beaks rather strongly thickened ; its margins are sharpened and bent externally ; 

 the furrow separating it from the body of the valve is quite indistinct, and the 

 one in the middle of tlie shell, where the striae of the surface converge, is only 

 traceable towards the ventral terminations ; the cast is quite smooth. The anterior 

 hiatus is broadly triangular, laterally slightly angular ; the posterior larger and sub- 

 ovate. The posterior amlcles are very narrow, separated from the central area of the 

 shell by a deep groove. 



LocaUty. — Found boring in fossil- wood at Ootatoor and at Moraviatoor. 



Formation. — Ootatoor group. 



* I shall again, — as in the second volnnie. treating on the Gastropoda of the South Indian cretaceons rocks, — adopt 

 the plan of numbering the genera consecutively throughout the whole class Pelecypoda, aud give separate numbers 

 to the species under each genus. 



