230 



tacles and plumes, this species is easily identified. It is allied to 

 D. rayc'e Souleyet, and D. lemniscata Quoy. 



Placobranchus ianthobaptus. Corpus oblongum, triquetrum, 

 postice abruptum, ex iiavido olivaceum, ocellis majoribus cocruleis 

 albo-pupillatis et ocellis minoribus albis aurantiaco-pupillatis ornatum, 

 cauda. et labiis ianthino tinctis : caput latum ; tentaculis ocliraceis 

 violaceo-annulatis : pes pallio baud disjunctus, smaragdinus, ocellatus ; 

 plicis branchialibus smaragdinis. Long. 21 ; lat. f poll. Coral reef 

 at Honolulu, Oahu. 



Like P. ocellatus, but too different to be considered a mere variety. 



Diphyllidia rtibida. Corpus lanceolatum, postice acuminatum, 

 erubescens, dorso concinne plicato ; pallium anguste retlexum ; caput 

 cucullatum. Long. 1^ poll. From a coral reef, Honolulu, Oahu. 



Elysia lobata. Corpus limaciforme, gracile, dilatatum, triloba- 

 tum, virescens nigro-punctatum ; pallium utrinque flavo-marginatum ; 

 tentacula? elongate. Long. 1 poll. Creeping on coral stems, like a 

 Doris, at Honolulu. Dr. Pickering. 



Genus CmoRiERA. Corpus Hmaciforme ; caput enorme, peduncu- 

 latum, semiglobosum ; pagina ventrali discoidea : ore longitudinali, 

 seriebus binis cirrhorum cincto : tentacular eephalicas foliatas, retracti- 

 les ; lobi branchiales flabelliformi, serie unica utrinque ordinati : fora- 

 men generativum ab anali remotum, fere dorsali. 



Accords with the family Tritoniadre except in the curious oral 

 apparatus. 



CuiORiERA leonina. Corpus albidum aurantiaeo subtiliter reticu- 

 latum ; lobi branchiales incolorati, aurantiaco Tenosi : solea incarnata. 

 Long. 5 ; lat. 1^ ; alt. 1 ; diam. capitis, If poll. Dredged at Port 

 Discovery, Puget Sound. Mr. Dyer. 



Chiton [Leptochiton] interstinctus. T. parva, rotundato- 

 ovalis, vix carinata, rubricata, ubique quincuncialiter punctata; 

 valvis ad apicem acutis, linea elevata luteo-maculata divisis, areis 

 lateralibus et valvis terminalibus juxta marginem phcatis : margo 

 coriaceus, granuloso-squamosus. Long. ^ ; lat. j- 3 ^ poll. Hab. Puget 

 Sound, Oregon. 



About the size and color of C. castaneus, and with the size and 

 many of the characters of C. Sitcliensis Middend. 



Chiton [Chastopleura] vespertinus. T. parva, sub-ovata, cari- 

 nata, thalassina intus rosacea, punctis triangularibus insculpta ; areis 

 linea elevata divisis ; valva antica lineis radiantibus octo notata ; 

 valva, postica parva, ad apicem emarginata, prope marginem umbo- 

 nata ; margine coriaceo, pilis raris induto. Long. l\ ; lat. ^ poll. 

 Inhabits Puget Sound, Oregon. 



Allied to ('. cilialus, Sowb., in the form of the posterior valve, size, 



