301 



cardinal area flattened, angular on the sides ; deltidia rather large, 

 flat and united ; ventral valve circidar ; the internal appendage 

 consists of a single mesial rib one- third the length of the shell 

 and two branches setting ofl' from the umbones. 



Prom the Straits of Fauveau, New Zealand. Kindly lent to us 

 by M. Deshayes, who has stated that it not only differs from T. 

 Californica in colour, but in the internal appendages. In the only 

 specimen we have seen these appendages appear to us to be incom- 

 plete. A specimen of our T. inconsjoicua is attached to it near 

 the apex. 



36. Teeebratula Zelandica (pi. kxii. f. 111-113.) DesJi. 

 Mag. de Zool. 1841 pi. 42. 



Testa subtransversa, subrotunda, subacuminata, ventricosa, 

 crassiuscula, rubra, valvis insequalibus, radiatim costellatis, costeUis 

 dichotomis; Hnea marginaH flexuosa, antice subsinuata; valva 

 dorsali postice subattenuata, reflexa, rotundata ; foramine magno, 

 integro ; area cardinali magna, rotundata ; deltidiis majuscuHs, 

 tetragonis, mediane coalescentibus, sulco centrali distincto; ca- 

 rina dorsali inconspicua, lata, rotuudata ; valva ventrali transversim 

 obovata, antice subsinuata; marginibus posticis declivibus; ossi- 

 culo interno prope cardinem e ramulis duobus divaricatis, costa 

 centrali postica constante ; marginibus valvarum crenulatis. 



Shell subtransverse, nearly orbicular, slightly acuminated, ven- 

 tricose, rather thick, red ; valves unequal, radiately costellated, 

 the little numerous ridges dichotomous ; marginal line flexuous, 

 somewhat sinuated anteriorly; dorsal valve shghtly attenuated 

 beliind and reflected, and rounded; perforation large, complete, 

 cardinal area large, rounded ; deltidia rather large, trapezoidal, 

 united in the centre, with a distinct central groove ; mesial ridge 

 broad, rounded and rather indistinct ; ventral valve transversely 

 obovate, shghtly sinuated in front; posterior margins inclined 

 downwards ; internal appendage close to the hinge consisting of 

 two divaricating branches and a central posterior ridge ; margin of 

 the valves creniilated. 



y From New Zealand; the specimen from wliich our figure is 

 taken was kindly lent to me by Madame Dupont. 



37. Terebratula transversa (pi. Ixxii. f. 114, 115.) nobis. 



Testa transversim subovata, tenui, rudi, glabra, pallescente ; 

 hnea marginal! subflexuosa, antice subsinuata ; valva dorsali ovato- 

 subtetragona, reflexa, postice obtusissime angulata ; foramine 

 maximo, incompleto ; area cardinali magna, planata ; deltidiis 



