230 



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

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



Placobranchus ianthobapttjs. Corpus oblongum, triquetrum, 

 postice abruptum, ex llavido olivaceum, ocellis majoribus coeruleis 

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

 caudS et labiis ianthino tinctis: caput latum; tentaculis ochraceis 

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

 plicis brancbialibus smaragdinis. Long. 2-| ; lat. ■§ poll. Coral reef 

 at Honolulu, Oahu. 



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



DlPHTLLIDlA rubida. Corpus lanceolatum, postice acuminatum, 

 erubescens, dorso concinne plicato ; pallium anguste reflexum; caput 

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



Elysia LOBATA. Corpus limacil'ornie, gracile, dilatation, triloba- 

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

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

 Doris, at Honolulu. Dr. Pickering. 



Genus ChioRjERA. Corpus limaciforme; caput enorme, peduncu- 

 latum. semiglobosum ; paging ventral! discoidea: ore longitudinal!, 

 seriebus binis cirrborum cincto: tentaculse cephalicse foliatae, retracti- 

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

 men eenerativum ab anali remotum, fere dorsali. 



Accords with the family Tritoniadaj except in the curious oral 

 apparatus. 



Ciiior.kra leonina. Corpus albidum aurantiaco subtiliter reticu- 

 latum; lobi brancbiales incolorati, aurantiaco venosi : solea incarnata. 

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

 Discovery. Puget Sound. Mr. Dyer. 



Chiton [Leptocbiton] ixtkiistixctus. T. parva, rotundato- 

 ovalis, vix carinata, rubricata, ubique quincunciabter punctata; 

 valvis ad apicem acutis, linea elevatS Luteo-maculata divisis, areis 

 lateralibus et valvis terminalibus juxta marginem plicatis: margo 

 coriaceus, granuloso-squamosus. Long. £; lat. fa poll. Ilab. Puget 

 Sound, Oregon. 



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

 many of the characters of C. Sitchensis Middend. 



Chiton [Chaetopleura] vespertistus. T. parva, sub-ovata, cari- 

 nata, tbalassina intus rosacea, punctis triangularibus insculpta ; areis 

 linea elevatfi divisis; valva antica lineis radiantibus octo notata ; 

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

 natfi ; margine coriaceo, pilis raris induto. Long. 1\ ; lat. fa poll. 

 Inhabits Pugel Sound, Oregon. 



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



