5S 



lique longUttdinaliter gramdoso-striatis ; valva Zii(E, Atte, ota, 

 Gtccet 1 ma: medio longitud'inaUter bisitlcatd : long. }~[^-^, lat.-^^jwll, 

 Hab. in Insula S'' Laurentii in Sinu Callao, Peruvise. 

 This species resembles Chit. crenulatuSf but may be distinguished 

 by attention to the above characters. 



Two specimens only were found on shells in seven fathoms water. 

 -G.B.S. 



Chiton Chiloensis. Chit, testd ohlongd, l<Evi, colorihus luridis 

 varid ; valvd anticd, valvarum intermediarum areis latcralibus et 

 valvee postica ared jiosticd radiatim pimctato-striatis ; valvarum 

 intermediartim areis centralibits et valva posticce ared anticd lon- 

 gitudinaliter punctato-striatis : valvis sex ]}osticis j^rope medium 

 longitudinaliter sulcatis : long. 2-rSr. lei. 1-,'^^ poll. 



llab. sub lapidibus ad littora Insulse Chiloe. 



Somewhat similar to, but very distinct from C/jJ<.C/uZe?isis, Frembl. 

 — G. B. S. 



C'liiTON RosETJS. Chit, testd ovato-oblongd, Icevi, rosed; dorso ro- 

 tundato ; valvd anticd, et valvarum intermediarum areis lateralibus 

 longitudinaliter, areis centralibus transversim sulcatis ; valvce pos- 

 tica vertice centrali, sulcis concenfricis : long. -^, lat. -rxr poll. 



Hab. ad Insulam Platae, Columbiae occidentalis. 



Found on dead shells in seventeen fathoms water, — G. B. S. 



** Ligamento marginis granoso. 



Chiton dispar. Chit, testd ovali, Icevigatd, cinered, albido nigroque 

 varid ; valvarum areis centralibus Icevibus, postice longitudinaliter 

 subsulcatis ; valvd anticd, valvarum intermediarum areis laterali- 

 bus et valva postica ared post icd granulosis : long. 1, lat. ^V, poll. 

 Hub. sub lapidibus ad littora In.sulae Sabogae in Sinu Panamae. 

 The name has been suggested by the circumstance of the central 

 arese being quite smooth, while the lateral areae are covered with 

 granules. — G. B. S. 



Chiton kugulatus. Chit, testd oblongd, Icevigatiusculd, oUvaced, 

 albicante varid ; valvd anticd, valvarum interjnediarum areis late- 

 ralibus et valvee ])Ostica; parte posticd concentrice undtdato-rugu- 

 losis ; areis centralibus IcEvibus, vmrginibus rugulosis : long. tV, 

 lat. -iV poll. 



Hab. ad oras Americas Centralis. ( Puerto Portrero and Inner Lo- 

 bos Island.) 



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



Chiton Columbiensis. Chit, testd ovatd, depressiusculd, cinera- 

 scente ; valvd anticd, valvarum intermediarmn areis lateralibus et 

 vulvae postictE ared posticd sparsim grariulosis ; hit ermediai-um 

 areis centralibus et posticte ared anticd lotigituditialiter granoso- 

 lineatis : long. l-jV, lat. i^ poll. 



Hab. in Sinu Panamae. 



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



Chiton tunctulatissimue. Chit, testd ovato-oblongd, Iccvi, colo- 



