16 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



DESCRIPTIONS OF EIGHT NEW SPECIES OF MARINE MOLLUSCA. 



By a. B. SowERBY, F.L.S. 



Sead 8th November, 1907. 



PLATE I. 



TUEBO GRANOLIRATUS, n.Sp. PL I, Fig. 4. 



Testa globoso-turbinata, crassiuscula, angustissime umbilicata, 

 pallide straminea, fusco late at oblique radiata, undique spiraliter 

 densissime grano-lirata, sulcis pernumerosis paruni obliquis longitudi- 

 naliter sculpta ; spira acuta, mediocriter elata ; anfractus 6 convexi, 

 siitura anguste canaliculata divisi ; ultiraus supra angulatus, ad 

 angulum rotunda carinatus, supra angulum concavus, infra convaxus, 

 basin versus obscure biangulatus, undique liris granulosis circiter 45 

 ad basin latioribus sculptus. Apertura circularis, aperta, intus laevis, 

 margaritacea ; columella callosa, antice effusa ; peristoma simplex, 

 ad marginem luteo tinctum. Long. 48, diam. maj. 43 mm. 



S^ab. — New Guinea (Boucard), 



The shell is similar in form to T. crassus, Wood, from which it is 

 distinguished by its close-set, narrow, conspicuously granular lirse ; 

 the granules are formed by the intersection of numerous rather oblique 

 longitudinal grooves. The lirse become broad and rather flattened 

 near the umbilicus, so that a rough plication is seen in place of the 

 granular appearance already described. 



I have only seen three specimens of this interesting species ; they 

 were found in the collection of the late Mr. A. Boucard, labelled " New 

 Guinea." 



LioTiA Walkeri, n.sp. PL I, Fig. 2. 



Testa subdiscoidea, late et profunde umbilicata, alba ; spira depresse 

 conoidea ; anfractus 3^, primi leviter convexi, penultimus depressius- 

 culus, radiatim leviter plicatus et subtilissime striatus, ad angulum 

 nodoso-carinatus ; sutura canaliculata, utrinque crenulata ; anfractus 

 ultimus bicarinatus, carinis acute nodulosis ; basis leviter planulata, 

 radiatim minutissime striata ; margo umbilicalis acute plicatus ; 

 apertura circularis ; peristoma crassum, duplicatum. Diam. 3'5, 

 alt. 3 mm. 



Mah.—l^.W. Australia (J. J. Walker). 



The nearest ally I can ' find to this species is L. discoidea, Eeeve, 

 than which it is much smaller, much less depressed, and instead of 

 having one duplicate keel at the periphery it has two separate acutely 

 nodulous keels, which become smooth and rounded towards the 

 aperture. 



A few specimens of this and of the following species were found in 

 shell-sand dredged by Mr. J. J. Walker off North-West Australia 

 some years ago. 



