274 DR. P. P. CARPENTER ON NEW SPECIES — [Mar. 14, 
‘4, DescRIPTIONS OF NEW SPECIES AND VARIETIES OF CHITONIDE 
AND ACMHIDH, FROM THE PanAMA COLLECTION OF THE 
tare Pror. C. B. Apams. By Pururp P. Carpenter, B.A., 
Pu.D. 
LEPIDOPLEURUS ADAMSII. 
L. ¢. « L. dispari” simili; pallide rufo-fusca, colore intensiore 
irregulariter strigata seu maculata; sepius maculis albidis 
regione diagonali ornata; jugo vie acuto; areis centralibus 
et valvis terminalibus conspicue granulosis; areis lateralibus 
irregulariter verrucosis, verrucis plerumque lobatis ; mucrone 
antico, vie eonspicuo: intus, valvis centralibus uni-, termina- 
libus vili.-x.-fissis ; subgrundis parvis, dentibus acutis ; sutu- 
ris medianis postice rectis, antice laminas haud attingentibus, 
sinu planato, latissimo: limbo pallit imbricatim squamoso. 
Long. °6, lat. ‘3 poll. ; div. 110°. 
Variat verrucis minus expressis, simplicioribus. 
=Chiton dispar, C. B. Ad. no. 373, par. 
= Lophyrus adamsii, P. Z.8., 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, 
223. The length should be 1:1. 
319. For “ labio nullo” read ‘‘ tenwissimo.” 
330. The nuclear shell has two whorls, Ampullaria-shaped. 
367. Add to diagnosis, ‘‘ operculo concavo, linea elevata suturam definiente.” 
368. Add to diagnosis, “‘operculo vie concavo, suturis minus definitis.” 
373. Add to diagnosis, “‘operculo concavo, suturis distinctis, pertpheriam 
versus linea elevata instructis.” The species was found living among the small 
Olivelle. 
376. Add to diagnosis, ‘‘ operculo concavo, suturis vie definitis.’ Living, 
among Olivelle. 
501. Instead of the specimen from which the description in the text was 
written, tablet 1966 contains a much finer shell, since found, which allows of the 
following additions to the diagnosis :—“ vert. nucl. parvo, satis extante, decli- 
viter sito; anfr. norm. v.; interstitiis carinarum transversim rugulosis ; labro 
solidiore. Long. ‘087, long. spir. 057, lat. :038.” 
510. A very beautiful shell, found in the refuse of Professor Adams’s Panama 
collection, is probably of this species, though the sutural cancellations are close. 
It has one more whorl: vertex Chemnitzoid, of three Helicoid whorls, scarcely 
projecting ; apex hidden. 
650. From perfect Cape St. Lucas specimens, add the following to diagnosis: 
— epidermide fimbriata, lirulas spirales eleganter decussante.” 
Page 312. Add to the diagnoses of opereula of Vermetide :— 
“(h.) Operculum corneum, intus convexum, nitidum, umbone magno extante ; 
extus concavum, paucispirale, lamina extante suturas definiente. Diam. ‘045.” 
Tablet 2537 contains the only specimen found, resembling Siphonium, from 
the Spondylus-washings. 
Tablet 447 is Liocardium apicinum, which should stand as species 709. 
Page 314, note * (e¢ seg.), for “ Inflatulum” read “* Mioceras.” 
Page 359, line 18, for “regular” read “ irregular.” 
