1866.] MR. H. ADAMS ON NEW SPECIES OF SHELLS. 445 



and the form being nearly sequivalve (which is, I think, in itself 

 strong evidence of its not being attached eitber to other individuals 

 or to foreign substances). 



This shell is probably rare, and therefore valued by the natives in 

 the localities where it has been found, as some of the valves sent 

 home by Mr. Bartlett are perforated at the small ends, apparently 

 for the purpose of being worn as ornaments. 



10. Descriptions of Six New Species of Shells, and Note on 

 Opisthostoma de-Crespignii. By Henry Adams, F.L.S. 



(Plate XXXVIII.) 



Fam. Buccinid^e. 

 Nassodonta, gen. nov. 



Testa ovalis ; spira brevis, anfractu ultimo antice sulcato ; aper- 

 tura antice sinuata, postice canaliculata ; columella callosa, antice 

 plicata; labrum acutum, intus incrassatum et dentatum, extus 

 antice denticulo instructum. 



1. Nassodonta insignis, sp. nov. (PL XXXVIII. fig. 8.) 



N. testa ovata, solida, Icevi, luteo-alba, fasciis fuscis tribus inter- 

 rupts ornata ; spira brevi, apice obtusiusculo, sutura simplici ; 

 anfr. 5, convexis, ultimo § longitudinis testis adcequante, basi 

 transversim 1 -sulcato ; apertura subovali, angusta; columella valde 

 arcuata, callosa, alba, postice callo mediocri munita ; labro acuto, 

 albo, intus incrassato et 2-dentato ; sinu siphonali amplo. 



Long. 11, diam. 6 mill. 



Hab. River Peiho, China, in company with Velorita. 



Fam. Chitonid^e. 



Frembleya, gen. nov. 



Testa ovalis, convexa. Valvce transversa, lata, carinata ; apex 

 posterioris valves terminalis, producta, Jissa. Limbus angustus, 

 postice fissus, setis cornels dense obsitus. 

 The covering of the mantle, the form of the visible portions of the 

 valves, and the peculiarity of the terminal valve render this species 

 distinct from any form of Chitonidse yet described. It has the ap- 

 pearance of a Lorica with the mantle covered with long bristles 

 instead of imbricate scales. 



2. Frembleya egregia, sp. nov. (PL XXXVIII. fig. 9.) 



F. testa ovata, antice paululum angustiore, viridi-fusca, ad latera 

 pallidiore ; valva antica radiatim costata, costis pustulosis, inter- 



