Obs. Species nitore eximio, sceulpturz absentia, et areis lateralibus 
obsoletis, facillime distinguenda, tanquam pietura et colore 
variabilis. 
6. Chiton (Lophurus, gemmulatus Shuttl. n. sp. 
Tesia parva, oblongo-ovata, olivaceo- vel czrnlescenti-viridis, 
dorsa late purpureo, interdum albido maculato; valvis terminalibus 
pustulis maznis rotundis nitidis pulcherrime ernatis; mediis vix 
obtuse carinatis: areis dorsalibus medio lzvibus ad latera trans- 
verse flexuoso-costulatis, areis !ateralibus elevatis pustulis conspi- 
euis subrotundis in seriebus 3 ad 4 radiatim liratis. Limbus rubro, 
viridi et albido maculatus, squamis magnis margaritaceis nitidissi- 
mis eximie tessellatus. 
Lenz. 10; Lat. 6 millem. 
Hab. St. Thomas, Blauner! rarissime. 
Obs. Specimina 3 speciei pulcherrim® accepi, cum nulla mihi nota 
»omparanda. Color variabilis sed semper externe plus minusve 
intense purpureus, interne pallide viridis, centro rubescens. 
7. Chiton (Ischnochiton) purpuraseens C. B. Adams. 
„Testa pr=longa, purpureo-rubente, eoneentrice striata; mar- 
zine (limbo) late, exilissime squamuloso, ezrulescente, alternatim 
pallidiore.* Adams. 
Long. 29; Lat. 10 millem. (in exempl. meis). 
Syn. Chion purpurascens C. B. Adams Proc. Bost. Soc. 
1845. p. 9. 
» sanguineus Reeve l.c.sp. 98. tab. 17. f. 98.(1847) 
Hab. India Oce., Cuming!; Jamaica, C. B. Adams; Portorico, 
Blauner!; St. Vincent, Guilding fide Reeve. 
Obs. Rarius oeeurrere videtur ex speciminibus tantum 2 a Blau- 
nero lectis. Species pulchra facile distinguenda, forma angusta 
valde elongata, sculpiura eximia in areis centralibus et latera- 
libus continua, et presertim limbo squamulis exilissimis oculo 
nudo vix distinguendis quasi furfuracco. 
8. Chiton (Ischnochiton) lateritius Shuttl. n. sp. 
Testa elliptice oblonga, convexa, lateritia, albido sparse macu- 
lata; valvis terminalibus subeoncentrice lineatis punetatisque; me- 
diis non earinatis: areis dorsalibus medio irregulariter foveolato- 
impressis ad latera transverse costulato-subsulcatis; areis lateralibus 
subelevatis radiatim subsulcatis et minute punetatim foveolatis. Lim- 
bus ruber concolor, sgamulis minutis applanatis dense obsitus. 
Long. 12; Lat. 6 millem. 
