145 



Chiton dentiens. Testa minima, ovata, carinata, olivacea, 

 ad dorsum albido fulmlnata, omnino minutissime granulata ; areis 

 vix dislinclis ; valvis rostralis poslice subdenticulatis, dentibus albi- 

 dis : margo pruinosus. Long. ■}, lat. ^\ poll. Hab. Paget 

 Sound. 



Resembles C. alternatus^ Sowb., which, however, has radiating 

 ribs upon its lateral areas and terminal valves. 



Chiton incanus. Testa solida, oblongo-ovalis, valde convexa, 

 cinereo et nigro variegata, concentrice undulato-striata, granulis 

 sparsis nigris aspersa, ad dorsum subcarinata et longitudinaliter 

 nigro bifasciata; areis lateralibus vix distinctis : margo aculeis 

 inequalibus curtis curvatis nigris et canescentibus indutus. Lcng. 

 ly\, lat. i poll. Hah. New South Wales. 



Like C. piceus, Gray, in general appearance, and still more 

 like C. petholatus, which has a hairy margin. 



Chiton muscosus. Testa ovalis, depressa, scabra, ad dorsum 

 obtusa, cinereo bifasciata et plumose striata ; valvis magnis, latera- 

 liter disjunctis ; areis lateralibus parvis, granulis subquadratis radi- 

 antibus arcuatim tessellatis ; areis centralibus sulcis acutis confertis 

 flexuosis subparallelis longitudinaliter aratis ; valva antica magna, 

 semicircular!, decemcostata et granulis subquadratis insculpta ; 

 valva posteriori parva, costa transversal! inconspicua subtermi- 

 nali : margo latus, filis corneis inequalibus muscosis indutus. 

 Long. 2, lat. l-J- poll. Hab. Puget Sound. 



Allied to C. brevispinosus, but its sculpture and margin are 

 quite distinct. 



Extracts from a letter from Zadock Thompson were read, 

 announcing the discovery, in the State of Vermont, of Ti^y- 

 onyx f 67^ ox and Cotlus gobio. 



Dr. D. H. Storer exhibited a drawing of Gasterosteus 

 hiaculeatus, made from a specimen taken at Nahant. 



donations to the museum. 

 A jaw of Carcharias obscurus. From Dr. D. H. Storer. 



additions to the library. 



Thesaurus Conch} liorum. By G. B. Sowerby. Nos. 3 to (5. 

 8vo. London : 1843 to 1846. Courtis Fund. 



