Descriptions nv nidw species and Varieties of Chitonidjb 



AND ACM^IDJE, FROM THE PaNAMA COLLECTION OF THE 



LATE Prof. C. B. Adams. By Philip P. Carpenter, B.A., 

 Ph.D. 



Lepidopletjrtis adamsii. 



L. t. " L. dispari" simili; pallide rufo-fusca, colore intensiore 

 irregulariter strigata seu maculata ; seepius maculis albidis 

 regione diagonali ornata ; jugo vix acuta; areis centralibus 

 et valvis terminalibus conspicue granulosis:; areis laternlibus 

 irregulariter verrucosis, vermcis plcrumque lobatis ; mucrone 

 antico, vix conspicuo : intus, valvis centralibus uni-, termina- 

 libus \'vi.—^.-fissis ; subgrundis parvis, dentibus acutis ; sutu- 

 ris medianis postice reetis, antice laminas hand attingenlibus, 

 sinu planato, latissimo : limbo pallii imbricatim squamoso. 



Long. -6, lat. -3 poll. ; div. 110°. 



Variat verrucis minus expressis, simplicioribus. 



= Chiton dispar, C. B. Ad. no. 373, par. 



=:Lophi/rus adamsii, P. Z. S., 1863, p. 24. 



Unfortunately for those who do not like to remove the non-tes- 

 taceous portion from their Chitons, as they do from their other shells, 

 the mantle-margin by no means affords a safe clue to the structure 

 of the valves. Among the species of the genus Ischnochiton, Gray, 



265 



