120 



given a figure of the animal, which he assures us is a mollusk. It 

 resembles D. coarctatum Desh. 



Terebratula transversa. T. reniformis, distorta, trans- 

 versa, tenuis, rufo-flavescens, punctata, costis radiantibus angu- 

 latis ornata ; valvis flexuosis, convexiusculis lateraliter angulatis ; 

 margine cardinali l-ecto ; apice vix eminente ; foramine magno 

 interrupto ; apophysi libero, imprimis exili deinde aculeo diver- 

 gente munito, denique membranaceo et in laqueo recurve- pro- 

 tracto. Long. 6 ; diam. transv. 8 ; lat. 4 poll. Inhabits Hakodadi 

 Bay. W. S. 



Like T. Grayi as to form, color, and sculpture; the internal 

 supports are much shorter, and the diverging processes and mem- 

 branous loop are also characteristic. 



Terebratella miniata. T. magna, rhomboideo-ovalis, glo- 

 boso-lenticularis, punctata, striis incrementi solum insculpta, min- 

 iata ; valva ventrali ventricosa, sulco mediano modico fluctuate, 

 costa, acuta mediana intus munita ; margine postico vix angulato ; 

 valva dorsali tectiformi*, antice subtruncata, postice rostrata ; fo- 

 ramine modico, integro ; apophysi primo gracili, dein subito late 

 expanso et ad cristam medianam affixo, denique reflexo et la- 

 queam efformante. Diam. long, et transv. 1.5 poll. ; alt. |- poll. 

 Inhabits Hakodadi Bay. W. S. 



In size, form, and color much like T. rubra or Zelandica, but 

 less fan-shaped and entirely destitute of radiating furrows or ribs. 

 The surface is like T. lenticularis, but is proportionally shorter 

 and trilobately waved. It is, moreover, generically distinct by 

 the union of its apophyses with the central crest. 



Rhynconella lucida. T. subcircularis, tenuissima, lucida, 

 dilute cornea, valvis suba3qualibus, ventricosis, impunctatis, sub 

 lente radiatim striata ; foramen integrum, parvum ; cardo ut in 

 Rhynconella ; apophyses ? Diameters about J inch. Dredged off 

 Japan Coast, 30° 35' N., 130° 40' E., in 110 fathoms, sand, by 

 Capt. Stevens, of the " Hancock." 



Might be taken for a small T. vilrea, but is very thin and 

 delicate, and further distinguished by its destitution of punctures. 



Discina stella. T. parva, discoidea, plano-convexa, ten- 

 uis, ex apice vix eccentrico levigato demum radiatim striata ; 



