404 Mr. E. A. Smith on new Species of 



pelled with considerable force through the narrow tube of the 

 papilla. 



It is not improbable that this fish is viviparous, and, conse- 

 quently, that copulation is necessary for the fecundation of the 

 ova. Both our specimens appear to have been obtained at 

 a season remote from that of propagation, as the testes, as well 

 as the ovaries (which are contained in thick membranaceous 

 sacs) , were remarkably small in proportion to the large size of 

 the fishes. 



XLV. — Diagnoses of new Species of MoUusca and Echino- 

 dermata from the Island of Rodriguez. By Edgar A. 

 Smith, F.Z.S. 



The following species form part of the collections made at 

 the island of Rodriguez by Messrs. George Gulliver and H. 

 H. Slater, the naturalists sent by the Boyal Society with the 

 British expedition for observing the Transit of Venus. Only 

 those species are here mentioned which are apparently un- 

 described, as it is purposed to publish elsewhere complete 

 accounts of all the specimens obtained at the island. 



Rhizochilus [Coralliophila) squamosissinius, sp. n. 



Testa ovato-fusiformis, aliqiianto umbilicata, alba; spira elevata, 

 turrita ; anfractus 7 convexi, costis spiralibus insequalibus pul- 

 cherrime squamatis, irregulariter alternatim majoribus ciucti, et 

 plicis longitudinalibus obliquis clatbrati; aufr. ultimus costia 

 spiralibus circiter 26 ornatus, ventricosus, inferne angustatus ; 

 apertiira ovato-pyriformis, alba, longitudinis totius |^ vix fequans ; 

 labrum margine crenulato ; columella alba, callo laevi induta ; 

 canalis angustus, obliqiius, leviter recurvus. 



Long. 31 mill., diam. 16 ; apertura long. 19, diam. 9. 



(Coll. by Slater.) 



The spiral ribs are most beautifully scaled, the imbrications 

 being very close together ; the longitudinal plications are rather 

 oblique and gradually further apart as the labrum is approached. 



Melania rodericensis j sp. n. 



Testa subulata, pallide olivacea, strigis longitudinalibus purpureo- 

 fuscis irregulariter picta, et circa basim anfr. ultimi fascia lata 

 coloris saturatioris cincta, frequenter corio limoso rubro induta ; 

 anfractus 11, convexiusculi, sutura leviter obliqua discreti, liris 

 transversis tenuibus plicisque longitudinalibus supra liras paululum 



