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110 



fusco-variis s marginibus ventralibus acute dentatis : hng. 1'75, 



lat. \', alt. 175 foil. 

 Hah. ad Sanctam Elenam et ad Salango, Columbise Occidentalis. 

 Found in sandy mud at from six to ten fathoms. — G. B. S. 



Pecten circularis. Pect. testd suborbiculari, tumidd, subcequivalvi, 

 aquilaternli, fusco alboque varid, auriculis magnis, subtequalibus ; 

 costis radiantibus octodecim interstitiis latioribus, arcuatim striatis; 

 valvd alterd sulcis profundioribus : long. 1-5, lat. 0'8, alt. 1'4 poll. 



Hab. ad Sinum Califomise. (Guaymas.) 



Found in sandy mud at a depth of seven fathoms. — G. B. S. 



Pecten aspersus. Pect. testd suborbiculari, depressiusculd, sub- 

 (Bquivalvi, cequilaterali, auriculis incequalibus, dextrd majusculd ; 

 valvarum alterd radiatim costatd, pallescente seu albd, costis qua- 

 tuordecim majoribus, rotundatis, leevibus, alterd radiatim costatd, 

 costis quindecim acutioribus, fuscis, punctulis ccerulescentibus 

 aspersis, interstitiis tenuissime transversim striatis , pallescentibus : 

 long. 1'4, lat. 0'5, alt. 13 poll. 



Hab. ad Tumbez, Peruviae. 



Dredged in soft mud at a depth of five fathoms. This species has 

 sometimes a fevi^ irregular blotches of white sprinkled over the darker 

 coloured valve. — G. B. S. 



, Pecten spiNiFERtrs. Pect. testd subovatd, depressiusculd, suitequi- 

 t*\. valvi, cequilaterali, auriculis inaqualibus, sinistrd majore ; valvis 

 radiatim costatis, costis utriusque novem, latis, squamuliferis, 

 squamulis fimbriatis ; valvae alterius marginibus dorsali, antico, 

 posticoque spiniferis: long. 0'9, lat. 0'25, alt. 0'9. 

 Hab. ad Insulam Lord Hood's dictam, Oceani Pacifici. 

 A single specimen of this beautiful little shell was taken on the 

 reefs in coral sand. — G. B. S. 



Pecten parvus. Pect. testd subovatd, depressiusculd, subcequivalvi, 

 «, aquilaterali, albicante, auriculis incequalibus, graniferis ; valvis 



radiatim costatis, costis octo intequalibus, transversim striatis ; 



interstitiis radiatim sulcatis et transversim striatis : long. 0*7, lat. 



0-25, alt. OS poll. 

 Hab. ad Insulam Lord Hood's dictam, Oceani Pacifici. 

 Found in coral sand on the reefs. — G. B. S. 



Genus Xylophaga. 



Xylofhaga globosa. Xyl. testd globosd, margine dorsali postico 

 declivi, valvis accessoriis majusculis : long. 0'4, lat. 0"35, alt. 0'35 

 poll. 

 Hab. ad Valparaiso. 



Found in a piece of wood dredged from a depth of a hundred 

 fathoms.— G. B. S. 



h 



