118 



ligamentum latum, squamis minutis elongatis sti*iatis vestitum, 

 fusco-fasciatum. Long. 30, lat. 20 millim. • Hab. China Seas, 

 probably Simoda. 



The number of ridges on the lateral areas and terminal valves 

 varies much. 



C. (Lepidopleura) lepidus. T. parva, elliptica, tectiformis, 

 flavo-virens olivaceo strigata ; valva antica semicircularis, radia- 

 tim striata ; v. postica crescentica, umbonata, radiata, antice longi- 

 tud. sulcata ; areis lateral, elevatis, sulcis radiantibus ad 6 in- 

 sculptis ; area centrali imbricatim sulcata ; ligamentum angustum 

 olivaceo fasciatum, squamis minutissimis vestitum. Long. 13, 

 lat. 9 millim. Hab. China Sea, lat. 24° N. W. S. 



This deeply sculptured little species resembles generally C. 

 Siculus. 



C. (Chretopleura) plumosus. T. fusco-cinerea, ovata, valvis 

 concavis vix umbonatis ; valva antica liris radiantibus phimosis 

 ornata; v. postica parva, umbone marginali et costa submarginali 

 utrinque notata ; area centrali magna striis divaricantibus et striis 

 lateralibus plumose coadunatis ornata ; areis lateral, parvis, costa 

 marginali finitis, striis denticulatis, interspatiis clathratis. Lig- 

 amentum latum coriaceum, tubulis (setigeris ?) instructum. Long. 

 1.5, lat. .75 poll. Hab. 



Allied to C. ccelatus Rv., which is said to be highly ornamented 

 with green and pink. C. Gollei and O. muscosus G. belong to the 

 same group. 



C. (Acanthochajtes) achates. T. angusta, elliptica, deluta, 

 fuliginosa, striga flava utrinque ornata, valvis scutiformibus ros- 

 tratis et carinatis, apicibus ebeninis glabris, alibi squamatim gran- 

 ulata ; valva antica semiovali ; v. postica parva, trigona, umbone 

 subterminali ; intus glauca. Ligamentum latum spinis curtis in- 

 equalibus et fasciculis spicularum munitum. Long. 30, lat. 20 

 millim. Hab. Kikaia and Hakodadi Bay. W. S. 



C. (Molpalia) Stimpsoni. T. tenuis, rotundato-ovata, de- 

 pressa, fastigiata, fusca, rufo, rosaceo viridi et flavo marmorata vel 

 lineata, concentrice striata ; valvis angustis planatis ; areis linea 

 elevata finitis ; valva antica parvula, crescentica ; v. postica mini- 

 ma, emarginata. Ligamentum coriaceum antice valde dilatatum, 



