288 Rev. R. T. Lowe on Melampus, S^c. 



Testa ohovata* vel ohlonga. 



1. Melampus .equalis, nob. Tab. XIII. f. 1, 2, 3, 4, (5, the shell.) 

 Mel. testa ohovata, subventricosd, obtusiusculd, Icevigatd ; anfractibus 



subaqualibus, planis ; spird aperturd breviore ; columelld 3-plicatd, 



plicis duahus inferiorihus parallelis, agualibus ; lahro simpliei, fin~ 



tvs IcEvi.J 



Long. -f7g-5 unc; lat. vix ,\. Anfractus 7 — 8. 



a. testd castaned, obscure subfasciatd. 



ft. totdalbd. 



Hab. infra lapides, ad littus septentrionale Insulae Maderse. 



In very numerous and fine specimens I have never seen in any stage 

 of growth the slightest approach to the formation of striae within the 

 outer lip ; or I should have suspected it to be an immature state of 

 some species, perhaps of Mel. Ovulum. It answers M^ell to Voluta 3- 

 plicata of British authors, except that the aperture is not contracted. 



2. Melampus gracilis, nob. 



Mel. testd gracili, angustd, elongato-ovatd, acuta, Icevigatd ; anfracti- 

 bus planis, cequaliter crescentibus ; spird prodactd, exsertd, aperturd 

 longiore ; columelld 2-plicatd plied medid majore ; labro simpliei. 

 Long. } unc; lat. i. Anfr. 7^. 

 Hab. in rupibus maritimis ; ad littus meridionale Maderae, prope 



urbera Funchal : v. m. 



I possess only one perfect and one mutilated specimen of this 



shell, and it may very possibly prove only an elongated variety of Mel. 



tsqualis. But though in young specimens o^ Mel. (equulis the middle tooth 



is also somewhat larger than the others, or more particularly than the 



lower one, yet the ventricose shape, and the proportions of the spire 



and aperture preserve constantly their characters. 



3. Melampus Firmini, nob. 



Mel. " testd ovato-turgidd, albido-jlavd, transversim striatd et pallide 

 fasciatd ; anfractibus planiusculis ; spird brevi, apice fuscescente ; 

 columelld triplicatd ; 4 lineas longa.'^ Payr- 



* Here and elsewhere by me the shell is placed in its proper and natural 

 position in respect to the animal, i. e. with the spire downwards. In the spe- 

 cific characters taken from Lamarck, the contrary position is to be understood, 

 viz. with the spire upwards. 



