126 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



DESCRIPTIONS OF NEW SPECIES OF MARINE MOLLUSCA 

 COLLECTED BY THE LATE OTTO KOCH AT THE ISLAND 

 OF CEBU, PHILIPPINES. 



By G. B. Sowerby, F.L.S., etc. 



Read Uth May, 1900. 



PLATE XI. 



1. OciNEBRA KoCHIASTA, n.Sp. PI XI, Fig. 1. 



Testa ovato-fusifomiis, pallide fulvo-f usca ; spira acuruinato-conica ; 

 anfractus 7, angulati, longitudinaliter angulatiin plicati (plicis 7-8), 

 spiraliter dense squamo-lirati, ad angulum carinati, supra anguluni 

 leviter concavi, anfractus ultinius spiram superans, oblongus, leviter 

 convexus, quadricarinatus, undique dense squanio-liratus, basini versus 

 constrictus, breviter contorto - rostratus, roediocriter urnbilicatus ; 

 apertura ovata, alba, ntrinque canaliculata ; lamina coluraellaris tenuis, 

 polita ; labrum intus acute plicatuni, extus frondosum. Long. 33, 

 diam. 18 mm. 



This shell has much the aspect of a Cuma, somewhat resembling 

 C. sacellum (Lamk.), but the operculum is that of an Ocinebra, in 

 which genus I therefore place the species. It has four squamose 

 keels on the body-whorl, the scales on the two anterior ones being 

 rather peculiarly produced near the aperture. In front of the last 

 keel the whorl is abruptly constricted between that and the short 

 curved rostrum. The aperture has, besides the anterior reflexed 

 canal, a distinct posterior one near the juncture of the whorl. 



2. Mitra (Callithea) alabaster, n.sp. n. XI, Fig. 2. 



Testa parva, ovato - fusiformis, alba ; spira breviuscula, conica ; 

 anfractus 6, primi duo loeves, sequentes superne vix concavo-declives, 

 in medio angulati, infra angulum spiraliter sulcati, supra (juxta 

 suturam) nodulis parvis ornati, costis longitudinalibus crassis 

 rectiusculis circa 12 instructi, anfr. ultimus spiram paulo superans, 

 antice leviter acuminatus, postice obtuse angulatus ; apertura 

 mediocriter angusta, longit. totius ^ aaquans ; columella quadri- 

 plicata. Long. 5, diam. 2 - 5 mm. 



A small white shell, with a rather short spire for a Mitra, 

 longitudinally lirate, slightly nodulous, and transversely groovnl ; 

 whorls obtusely angled above, with a slightly nodulous ridge against 

 the suture. 



3. Marginella ringicttla, n.sp. PI. XI, Fig. 3. 



Testa ovato -fusiformis, alba ; spira producta ; apertura angusta, 

 longit. totius -^ scquans; columella quadriplicata, plicis crassiusculis, 



