300 



PROCEEDINGS OF THE MALA.COLOGICAL SOCIETY. 



Cythaea optabilis, n.sp. PI. XXV, Fig. 4. 



Testa ovato-f usiformis, alba, maculis aurantiis ornata ; spira elata, 

 convexa, ad apicem acutiuscula ; anfractus convexi, la^viusculi, 

 spiraliter leviter striati, plicis crassiusculis rotundatis circiter 12 

 (in anfr. penult.) instruct!, sutura profunda canaliculata, crenulata, 

 discreti ; penultimus turgidus, maculis aurantiis quadratis super costas 

 uniseriatim ornatus ; ultimus f totius longitudinis testae vix sequans, 

 biseriatim maculatus ; apertura ^ long, testae sequans, mediocriter 

 lata ; labrum extus crassivaricosum, ad marginem acutum, postice 

 rotunde sinuatum, intus denticulatum, siuu antico latiusculo rotundato ; 

 columella oblique rectiuscula, plicis numerosis confertis instructa. 

 Long. 11-5, diam. 5 mm.; apert. long. 6 mm. 



Sab. — New Caledonia (Bouge). 



This pretty shell is nearly related to C. eupcecila, Hervier, but on 

 the penultimate whorl there is only one series of squarish orange spots, 

 and two on the body-whorl ; in the type, on the back of the body- 

 whorl, the spots become merged into longitudinal flames, but in some 

 specimens the spots are distinct throughout. The specimens are 

 mostly larger than those of C. eupcecila, in which the spots are more 

 linear in two series on the penultimate, and three on the body-whorl. 



Pleukotoma abbreviata, Reeve, var. Lifuensis, nov. var. PI. XXV, 

 Fig. 5. 



Quam P. abbreviata typica multo brevior, magis angulata, carina 

 duplicata ad anguliim magis prominens. Long. 17, diam. 10 mm. 



JIab. — Lifu, Loyalty Islands. 



This form, which seems peculiar to the Loyalty Islands, has long 

 been known under the name of F. abbreviata, but its aspect is so 

 different from Keeve's type from the Philippine Islands that it is 

 worthy of at least a varietal name. I exhibited at the meeting of 

 the Malacological Society, April I'ith, a series of specimens of the 

 typical F. abbreviata from the Andaman Islands and Mauritius, than 

 which the Lifu variety is of a much shorter form, more angular, with 

 a much more prominent keel. 



Mitra (Pusia) accincta, n.sp. PI. XXV, Fig. 6. 



Testa parva, ovato-fusiformis, crassiuscula, Isevis, longitudinaliter 

 obtuse plicata, pallide fuscescens, transversim fusco lineata et zonata, 

 zonula albida cincta ; spira mediocriter elata, acuta ; anfractus 7-8, 

 convexiusculi, sutura distincta discreti, costulis verticalibus parum 

 elevatis rotundatis laevigatis (in penultimo 11-12) instructi, zonula 

 albida versus medium cingulati ; ultimus spiram superans, convexus, 

 costulis partim evanidis, prope basim parum contractus, leviter rugosus, 

 lira duplicata latiuscula obliqua albida cinctus, ad basim nigro 

 tinctus ; apertura mediocriter lata, |- longitudinis testae a^quans, intus 

 fuscescens, lajvis ; labrum levissime sinuosum, crassiusculum, glabrum, 

 nigro-fusco tinctum ; columella rectiuscula, leviter obliqua, tenuiter 

 callosa, nigro-fusca, triplicata, plicis crassiusculis, oblique decre- 

 scentibus. Long. 13, diam. 6. mm. 



Mab. — Monac Island, New Caledonia (Bouge). 



