3G1 



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

 flat and united ; ventral valve circular ; the internal appendage 

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

 and two branches setting off from the umbones. 



From 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. inconspicua is attached to it near 

 the apex. 



36. Terebratula Zelandica (pi. lxxii. f. 111-113.) Desk. 

 Mag. de Zool. 1841 pi. 42. 



Testa subtransversa, subrotunda, subacuminata, ventricosa, 

 crassiuscula,, rubra, valvis inasqualibus, radiatim costellatis, costellis 

 dichotomis ; linea 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, rotundata ; valva ventrali transversim 

 obovata, antice subsinuata ; marginibus posticis declivibus ; ossi- 

 cido interno prope cardinem e ramidis 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 httle numerous ridges dichotomous ; marginal line flexuous, 

 somewhat sinuated anteriorly; dorsal valve slightly attenuated 

 behind 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, slightly 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 crenulated. 



! Prom New Zealand; the specimen from which our figure is 

 taken was kindly lent to me by Madame Dupont. 



37. Terebeatula transversa (pi. lxxii. f. 114, 115.) nobis. 



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

 linea, marginali subflexuosa, antice subsinuata ; valva dorsali ovato- 

 subtetragona, reflexa, postice obtusissime angulata, ; foramine 

 maximo, incomplete ; area cardinali magna,, planata, ; deltidiis 



