MONODONTA. 93 



PisCHER, Coq. Viv., p. 201, t. 67, f. 6. — Deshayes, Ann. de Malacol. 

 {France) i, p. 9, t. 1, f. 1. — BucQ., Dautzenb., et Dollfus, Moll. 

 Mar. du Rousslllon, p. 402, t. 48, f. 6-11. — Caragolus turbinaius 

 MoNTERosATO, Nom. Geu. e Spec, p. 43. 



The name T. tessulatus Born, was the first applied to this species ; 

 but as Philippi, Fischer, and most modern authors have adopted the 

 name turbinatus of Born, we had better not inquire too curiously 

 into the question of absolute priority ; especially since tessellatus is a 

 name that figures in the synonymy of the following species. 



A number of varieties are recognized by Messrs Bucquoy, Daut- 

 zenberg and Dollfus ; the jn'incipal ones are var. globosa Requien, 

 less elevated, more globose than the type ; var. elongata Requien, 

 a slender form (pi. 21, fig. 21); var. zebra Wood, ornamented 

 with longitudinal zigzag lines. 



Plate 21, fig. 28 is M. fragoroidus of Lamarck. 



M. ARTicuLATA Lamarck. PI. 21, figs. 33-36. 



Shell imperforate in the adult, generally perforate when immature, 

 elongate-conical, heavy and thick ; color cinereous greenish or whit- 

 ish, spirally traversed by bands comj^osed of alternating white 

 and black purplish or red squarish spots, the intervals between the 

 bands longitudinally closely lineolate with blackish ; spire elevated ; 

 whorls about 6, the upper ones slightly convex, the last generally 

 constricted and concave below the suture, then convex ; spiral im- 

 pressed grooves or lines like those of M. turbiuata in the young, 

 but generally obsolete in adult specimens ; aperture ps in M. 

 turbinata, but smaller and less oblique. 

 Alt. 25-30, diam. 21-24 mill. 



Mediterranean and Adriatic seas ; Portugal. 



M. articulata Lam. An. s. Vert., vii, p. 36 (1822). — T. articulatus 

 Philippi Conchyl. Cab., p. 163, t. 26, f. 13-15.— Hidalgo, 3Iol. 

 Mar. de Espana, etc., t. 61, f. 3, t. 62, f. 6-8. — Deshayes, Ann. de 

 Malacol, i, 1870, p. 8, t. 1, f 2.— Fischer, Coq. Viv., p. 204, t. 68, 

 f, 1, — BucQ., Dautz. et Dollfus, Moll. Mar. du Rousslllon, p. 404, 

 t. 49, f. 1-7, 10. — T. tessellatus von Salis Marschlins, Reisen in 

 Koen. Neapel, p. 374, t. 7, f. 7 (not tessellatus Gmel.). — Deshayes, 

 Exped. sci. au Moree, p. 140. — M. draparnaudii Payr., Moll, de 

 Corse, p. 131, t. 6, f. 17, 18. 



The form of this species is more elongated than the preceding, 

 and the last whorl usually more concave above ; the coloration will 

 .also separate the turbinata from this species ; for the former has no 



