98 t<2¥-r 



convexior, teque longa ac lata ; apice rectangulari, truncate, 

 lateribus incumbentibus ; foramine moclico, circulari : apophysis 

 brancbialis tenuissima, reflexa, incurabens. Diam. f ; alt. £ poll. 

 Hah. Puget Sound, Oregon. 



It has the same form and color and surface as T. vitrea, but 

 is more rounded in front, the incurved areas of the beaks much 

 broader and flatter, the ligament aperture larger, &c. Like 

 other species of the genus, it varies much in form, some being 

 quite globose, while others are compressed. 



Mactra debilis. T. parva, alba, tenuis, transversa, elongato- 

 ovata, antice ovata, postice acuta, valde hians ; valvis tumidis, 

 postice compressis ; umbonibus eminentibus acutis, antemedia- 

 nis : cardo debilis ; dente V-formi parvo ; dentibus lateralibus 

 curtis, acutis. Long. If ; alt. 1 ; lat. ^ poll. Hab. Singapore. 



A veiy delicate species, resembling in all its outlines small 

 specimens of Mya arenaria. cruL trfr- p-. nyS: 



Bulla parallela. T. parva, tenuis, cylindracea, lactea, 

 antice rotundata, postice conica, imperforata, longitud. minutissime 

 striata, ad verticem et ad basim striis undulatis decussata : 

 apertura angusta, deorsum dilatata ; columella callo baud appresso 

 induta ; labro ultra spiram adscendente, tunc deorsum intorto. 

 Long. 2 9 ; lat. ± poll. Hab. ? 



Smaller and thinner than B. solidula, though striated at the 

 ends like it, and having the same conformation of the lip. Its 

 sides are parallel. 



Tornatella bullata. T. parva, ovata, tenuis, albida, 

 epidermide stramineo fugacissimo induta, spiraliter sulcata, sulcis 

 linearibus ad 5 ordinatim dispositis in singulis anfractibus : spira 

 prominula, turrita ; anfr. 5 tabulatis, ultimo magno, ventricoso, 

 15-sulcato, supernis planulatis ; sutm*a canaliculata : apertura 

 semilunaris ; columella uniplicata, planulata. Long. J ; lat. £ 

 poll. Dredged off Patagonia. 



This little species like T. puncto-striata and T. venusta, to 

 which it is allied, has not the ivory surface of most species. It 

 is well characterized by its form and sculpture. 



Haliotis crispata. T. parva, tenuis, convexa, elongato- 



