■WEBB: OKT THE GENUS MAEI^LIA. 153 



is smaller in every respect. The teeth of the radula in the last- 

 mentioned species resemble those of a typical Girasia rather than those 

 of Maricella Beddomei, which, on the whole, seems the more nearly 

 related to Girasia. 



Maei^lla Dtjssumieei (Yalenc. MS.), Gray. PL IX, Figs. l-Q. 



Maricella Dussumieri, Gray: Cat. Pulmonata Brit. Mus., pt. ii (1855), 



p. 63. (No fig.) 

 Viquesnelia Dussumieri, Gray : Fischer, Journ. de Conch., 1856, 



p. 290, pi. iii, fig. 18. 

 Tennentia Thwaitesii, Humbert: llev. & Mag. Zool., 1862, p. 42, pi. xvii. 

 Vega Nordenshioldi, Westerlund : Yega Exped., vol. iv (1887), p. 190, 



pi. ii, fig. 1. 



Animal lateribus corporis fulvis, antice unicolor, post pallium nigro- 

 striatum ; pallium flavidum nigro - maculatum, valde tricarinatum. 

 Cochlea, non per foramen minutum pallii visa sed apex per pallium 

 conspicuus. Solea pedis albida. Maxilla longitudinaliter et distincte 

 striata. Dentes radulae laterales valde tricuspidati, in marginales 

 celeriter mutantes. Spermatheca saccule spiculi amoris longior. Long, 

 (in Formaldehyde) 26, diam. 9 mm.^ 



Hab. — Mahi and Ceylon. 



This is the type species, for one must exclude the Limax infumatus 

 figured, but not described nor localized, by Ferussac, which has been 

 suggested as a possible member of the genus. 



The ground colour is yellowish-brown, becoming more yellow on 

 the surface of the mantle, which is marked with dark blotches, while 

 dark lines occur upon the sides of the foot behind the mantle. The 

 foot-sole is whitish, the pore in the mantle minute and not easily 

 discovered in spirit specimens. The surface of the mantle bears three 

 distinct keels, that on the foot being light- coloured. The shell in all 

 the specimens and figures seen by the writer is thin and concave, but 

 Fischer says that it becomes filled up as in the next species. The 

 jaw is distinctly striated longitudinally ; the central and lateral 

 teeth of the radula have large meso-cones and well-developed, pointed 

 ecto- and ento-cones; the last-named are soon lost, and the teeth, as 

 one passes towards the edges, quickly change into typical bicuspid 

 marginals, in which the ecto- and meso-cones are practically identical 

 in size, so that each tooth much resembles a serpent's tongue. 



The dart sac is much shorter than the spermatheca and com- 

 paratively small. 



The localities for this slug are Mahi (Dussumiers) and the Botanic 

 Gardens at Peradeniya, Ceylon, under stones with Veronicella (Thwaites) ; 

 Point de Galle (Vega Expedition); Watawala, November, 1896 (with 

 Veronicella), 3,600 feet; and Ambegamuwa District, Central Province 



1 The Mahi type is 26 x 7 mm. The largest of the Museum specimens labelled 

 M. Thivaitesii is 21 x 6 mm., while the one from which the dissection was made 

 was rather larger than that of which the measurements are given above. 



