1880.] LAND-SHELLS OF MENTON. 133 



Type, Indian Museum, Calcutta ; also in coll. J. R Bourguignat, 

 Coombe Williams, P. Joly, T. Fagot, and Colonel Godwin- Austen. 



Stenogyra (Rumina) decollata, Linnaeus. 



Abundant everywhere in the submaritime zone. A perfectly 

 similar form also occurred by thousands in the upper stratum of 

 Cape Mortela. I do not believe this moUusk existed at Meuton at 

 the time of deposits A to F; but I found a large stout variety alvpays 

 immediately associated with H. paretiana at Monaco, Cape Vieille, 

 lower stratum at Cape Mortela, &c. At this last locality it was very 

 interesting to notice how sharply the upper and lower strata were 

 defined by the very marked difference in this species. The stout 

 big variety from the lower stratum reminded me strongly of 

 specimens I found near Bone, in Algeria. 



Long. 33, diam. 11^ millim. Upper stratum. Cape Mortela,. 

 like the existing form. 



Fertjssacia gronoviana, Risso' (as figured by Bourg., diam» 

 3i millim.) (Plate XIV. fig. 2.) 



An abundant species here and therein the submaritime zone only. 

 I also found it in great numbers at Alassia. Taking a handful of 

 living specimens from under one stone, the great variability in the 

 shape of the whorls, production of the spire, &c. is at once seen ; 

 still the aperture and last whorl in especial always present certain 

 characters by which the species can be recognized. The animal has 

 the head, top of neck, and both sets of tentacles, also extreme pos- 

 terior extremity dark green, almost black ; the rest is a very bright 

 greenish yellow. 



Long. 10, diam. 3| ; another — long. 9, diam. 3| millim. 



Var. SUBAMBLYA. 



1 Ferussacia ambltja, Bourg. Mai. Alg. (long. 8^, diam. 4 milHm. 

 Algiers). 



This is a short convex form, with the last whorl a good deal more 

 rounded, the aperture less everted, with the columella straight. 

 The whorls increase very slowly and regularly, the difference of the 

 antepenultimate one in this respect, from that of the typical form, 

 being very marked. It may prove a distinct species ; but I am in- 

 clined to doubt it at present. I only found a few specimens living 

 with typical form. 



Long. 8 J, alt. 3^ millim. 



' [Among tlie examples of this species given me by Mr. G. Nevill I found a 

 good many were still living ; these I closely examined. The animal possesses 

 a well-developed muciiB-pore at the extremity of the foot, and therefore belongs 

 to the StenogjricliB of Crosse and Fischer. It is closely allied in its anatomy 

 to the Madeiran form (Lovea tornatcllina) described by the Eev. E. B. Watsou 

 in the P. Z. S. 1875, p. G77, which is of interest as regards geographical distri- 

 bution. I hope soon to give some details of its anatomy, which I have pre- 

 pared.— H. H. G.-A.] 



