68 



valvee dextrfe, numerosis, minute squamosis, ineequalibus : 

 colore sulphureo, costis alternis depressis, rubro maculatis. 

 Long. 0. 92.; lat. 0. 30.; alt. l.j poll. 



The only specimen of this shell with which we are ac- 

 quainted is in the collection of the Rev. F. J. Stainforth. 

 The ribs are scaly near the margin, the intermediate ones, which 

 are more depressed, have spots of a deep red colour in the 

 centre of the shell. 



69. P. Tigris, (pi. xiv. f. 95-6.) Lam. Anim. sans Vert. 

 T. sub-eequivalvi, oblique sub-trigona, sub-complanata, sub- 



scabrosa, interne valide costata; auriculis ineequalibus, sulcatis, 

 posticis parvis, anticis acutangulatis ; costis 11, valide sulcatis, 

 supra sub-angulatis, lateralibus parvis ; interstitiis sulcatis, 

 latis: colore albo, superne lutescente, fasciis fuscis rufescen- 

 tibus, angulatim maculato, intus luteo, cardine nigro, macula 

 rosea, ad basin auriculee anticae in valva, dextra. Long. 1. 40 ; 

 lat. 0. 40 ; alt. 0. 60 ; poll. 



The right valve of this species is a little deeper than the 

 left, contour somewhat oblique and lengthened posteriorly, 

 having 1 1 longitudinally sulcated ribs, the lateral one on each 

 side very slightly raised. The colour is nearly white, tinged 

 with yellow, marked with tiger-like stripes of dark reddish 

 brown, the inside is yellow with a black band on the hinge, and 

 a pink spot at the base of the anterior auricle of the upper valve. 



Indian Ocean, Lam. Isle Masbate, Philippines, Mr. Cuming. 



70. P. madreporarum. (pi. xiv. f. 68.) Petit. 



T. oblique ovata, compressa, irregulari, radiatim striata : 

 auriculis ineequalibus, anticis magnis, posticis parvis : costis 7 

 obsoletis, distantibus : colore albo, nigro maculato. Long. 

 0. 66. ; lat. 0. 10. ; alt. 0. 80. ; poll. 



This small, white, flat, oval, black-spotted shell is found in 

 holes of Madrepore. It is from the Red Sea. 



71. P. Tegula. (pi. xiv. f. 90.) Wood's Index. 



T. sub-quadrata, irregulari, sub-sequivalvi, compressa, folia- 

 cea. ; auriculis ineequalibus, anticis maximis, valvee dextree 

 antica, validissime emarginata; costis, valvse sinistree, 9 ad 13 

 crassis, irregularibus, ineequalibus ; squamas crassas, sub- 

 quadratas, ferentibus : interstitiis irregulariter radiatim sul- 

 catis ; costis, valvee dextree, numerosis, squamiferis : colore, 

 fusco, paululum variegato. Long. 2. 85. ; lat. 0. 90. ; alt. 3. 

 20.; poll. 



More irregular and more spreading at the sides than the 

 following, with the ribs fewer and thicker ; the scales thicker 

 and more square, and the anterior auricles much broader. 



Japan. 



