1893.] XEW SPECIES OF PLEUROTOMID.E. 491 



in sculpture it resembles B. lactea, but the spiral ridges are closer ; 

 in form it approaches D.flammea and D. suhida. 



Defe.4:n'cia ixebacincta, n. sp. (Plate XXXVIII. figs. 21, 22.) 



Testa ohlonga, solida, carnea; sjnra mediocnter eJata, ad apicem 

 acvta ; anfractus 8, convexi, linen fusca temdssima ornati, 

 spiraliter lirati, lonr/itudinalite)' costati, costis numerosis, 

 rotundatis ; anfractus idtimvs vix i»Jlah(s, infra medimn leviter 

 coiistrictus, fascia fusca conspicua pictus ; apertura hreviuscida ; 

 lahrum extus incrassatian, inii(S serratvm, siiperne profunde 

 sinuatum, canali hrevissimo, 

 Loiui. 10, maj. diam. 4 millim. 

 Hah. Mauritius. 



A rather rough shell, with numerous rounded ribs, crossed 

 by close-set raised ridges. The conspicuous band near the base 

 surmounted by a thin broMTi line seems characteristic. 



Defr-Otcia MArRiTiANA, u. sp. (Plate XXXVIII. figs. 23, 24.) 



Testa tnrrita, albida, maculis fitscis promiscuis picta, vndique 

 costis numerosis confertis gramdatis scidpta ; spira elata, leviter 

 convexa, ad apicem acuta; anfractus 9, gradati, levissime 

 convexi ; sutura impressa ; anfractus idtimus spiram vix 

 ceqiians, hand injlatxis., rectiusculus, ad basim constrictus ; 

 apertura parviiiscula, ohlonga ; lahrum crenulatmn, incras- 

 satum, superne sinu profundo emarginato, inferne ahrupte 

 constHctum, canali hrevissimo. 



Long, 10, maj. diam. 3 millim. 



Hah. Mauritius. 



A conspicuously painted species, with a strongly granulated 

 surface ; the constriction of the base is peculiar. 



CTTH.^aA guentheei, n. sp. (Plate XXXVIII. figs. 27, 28.) 



Testa solidiuscida, utrinque acuminata, albida, p)«-^l^de fusco tincta 

 et vittata, postice purpureo tincta ; spira elato-conica, gradata ; 

 anfractus 10, angidati, undique spiraliter striati, longitu- 

 dinaliter costati ; anfractus idtimus spiram superans, convex- 

 iuscidus, basin versus attenuattts ; apertura elongata, angusta; 

 cohimella levissime curvata, albo-callosa ; labnim extus incras- 

 satum, ad marginem acutum. 



Long. 25, maj. diam. 11 / apertura longa ]5, lat. 3 millim. 



Hah. Holotliuria Banks, N.W. Australia, 38 fathoms. 



A beautiful delicately sculptured shell, hitherto without name, in 

 the British Museum Collection. 



Cyth-^ra eingens, n. sp. (Plate XXXVIII. figs. 29, 30.) 



Testa ahhreviata, angidata, idrinque acuminata, alba; spira 

 conica, ad ajyiccm actda ; anfractus 7, angidati, longitudinaliter 

 costati, sjnraliter stdjtilissime striati ; sutura anguste canali- 

 culaia ; anfractua idtimus sjtiram superans, angulatus, supra 

 angidum leviter concavus, deinde viv convexus, basin versua 



