WORMS, ETC.
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superiore corporis facie; capite longiori, fronte mediocritercxcisa, oculis in unam seriem dispositis. Halimede, nov.gen., with the single species, H. venusta, is distinguishedfrom Hesione by the following diagnosis: proboscis sub-globosa, crassa, orificio sub-quadrangulari, tentaculis non-nullis praedita; maxillae nullae; antennae 4 parvae ; externaeintermediis paulo majores; cirrorum tentacularium paria 6 ;cirri superiores praelongi filiformes; pedes indivisi, branchiistribus parvis praediti. Ephesia, nov. gen, with the species,E. gracilis, differs from Goniada in the following: maxillae,oculi, tentaculi, et cirri tentaculares desunt; proboscis longa,clavata, laevis ; corpus elongatum, utroque latere eminentiismammaeformibus, et fasciculis setarum brevissimarum inunam seriem dispositarum. Besides these there are alsonew— Nephtys ciliata: proboscide cirris conoideis brevi-oribus in 5 series transversas dispositis ; extremitatum ramosuperiore carente. Glycera alba: antennis 4 ; extremita-tibus branchia una falciformi, cirro superiore minori, cirroqueinferiori multo majori, complanato, triangulari fere, in-structis. Aricia Mulleri: duobus minutissimarum setarumfasciculis in utraque 17 anteriorum segmentorum latere;eminentia lamelliformi pone inferiores illos fasciculos autindivisa, aut semel incisa. Arenicola Boeckii: corpore gra-cile, extrema versus pedetentim attenuato; branchiarumparibus 40. Bordering upon Arenicola is the new genus,Sculibregma, with the species, Sc. injlatum: corpus molle,longum, annulatum, suhcylindricum; setarum fasciculi 4, inomnibus fere corporis segmentis; branchiae in anteriorecorporis parte, pone totidem setarum fasciculos dorsales,fruticosae; eminentiae setiferae in posteriore corporis dimidiaparte pediformes, complanatae, in duos ramos divisae; an-tennae, maxillae, oculi nulli; proboscis sine eminentiis ver-rucaeformibus. Ammotrypane: corpus elasticum,prolongatum,annulatum, glabrum; branchiae simplices, cirriformes, induos series ad corporis latera dispositae; setae omnes tenues,simplices ad corporis latera; caput ante diminutum et acuteterminatum; os in inferiore capitis facie, nudum, transver-