27 



**** Ligamento marginis coriaceo. 

 Chiton Blainvillii. Chit.testd subrotundd, valvd anticd ob- 

 scure radiatd, posticd 7mnimd,ab7-uptd, ccBteris concentrice lineatis, 

 rosed, albo,Jusco, viridique varid, interne albidd; limbo auran' 

 tio-rubro postice valde angusto, antice enormiter producto, sub- 

 rotundo, processibus coriaceis brevibus hinc et hinc {prcecipue ad 

 marginetn anticum) lacinioso : long. 2, hit. 1^ poll, 

 Hab. ad oras Peruvianas. (Inner Lobos Island.) 

 The enormous production of the anterior part of the border gives 

 to this species a considerable resemblance to a waterman's cap, or 

 to an English coal-Iieaver's hat. 



Although sought for with great perseverance by Mr. Cuming, 

 only a few specimens adhering to a stone were obtained while 

 dredging in seventeen fathoms water, — W. J. B. 



Chiton Elenensis. Chit.testd oblongd, pallida ; dorso rotun- 

 dato ; valvd untied radiatim sulcatd ; areis lateralibus valvaruni 

 intermediariim iurgidis, unisidcatis ; valvd posited retusd, postici 

 radiatim sulcatd ; areis centralibus valvaruni intermediariim irre- 

 gulariter sidcato-scabrosis ; margine Icevi: long, -fa-, lat. -^ poll. 

 Hab. ad portum Stse Elenae et Panamae. 



This is the Chiton Janeirensis, var.? Gray. It is unquestionably 

 a distinct species, as Mr. Gray hints it may be, from his Chit. Ja- 

 neirensis. 



Found under stones at low water. — G. B. S. 

 Chiton Swainsoni. Chit, testd oblongo-ovali, dorso elevatius- 

 culo, castaned, albido-lineatd ; valvis rotundatis ; valvd anticd, 

 ared posticd valvce posticce et areis lateralibus valvaruni inter- 

 mediarum leviter radiato-granulosis ; areis medianis valvarum 

 inter mediarum lungitudinaliter sulcatis : long. 1 %, lat. 1 poll. 

 Hab. ad oras Peruvianas. (Iquiqui and Callao.) 

 1 his species resembles in colouring Chit, lineolatus, Frembl , but 

 differs materially in its sculpture. 



It was found on Mytili and Pectines in nine fathoms water. — 

 G. B. S. 



Chiton crenulatus. Chit, testd oblongd, albido-roscd, lineis 

 nigro-viridibus subconcentricis varid ; valvd anticd siibgranoso- 

 radiatd, posticd retusa, cceteris granoso- subconcentrice lineatis, 

 medio externe carinatis, interne nigro-riibris ; areis lateralibus 

 granoso-biradiatis : long. l-rV> l^f-t- 1 poll. 

 Hab. ad oras Americae Meridionalis. (Panama.) 

 Found under stones below low water mark. — W. J. B. 



***** Ligamento marginis setoso. 

 Chiton setosus. Chit, testd oblongo-ovali, cinereo-virescente , 

 scabrosd ; valvd anticd, areis lateralibus valvarum intermediarum 

 et valvd posticd radiatim sulcatis ,- setis marginis breviusculis, cort' 

 fertis : long. 1-^%, lat. -x''\y poll. 

 Hab. ad oras Americas Centralis. (Guacomayo.) 

 This species is very distinct from Chit, setiger. King, (Zool. 

 Journ. vol. v. p. 338,) which it in some degree resembles. The bris- 

 tles around the edge are much shorter, thicker, and more closely set. 



