72 TETHYS-EUROPEAN. 



finely radially crenulate), and the system of coloring different. It 

 is also more widely diffused. 



The name A. rosea of Rathke, if really belonging to this species, 

 has precedence over punctata ; but it was founded on a young speci- 

 men, and the coloring described (" roseate, spotted with white and 

 brown ") is unlike any specimens known to me. It was from near 

 Christiania. 



Jeffreys (Brit. Conch., v, p. 7) refers the A. varians and Esmia 

 griffithsiana of Leach to punctata. The descriptions and figures of 

 these are very ambiguous. 



T. LEPORINA Linne. PL 33, fig. 20, 21, 22, 23, 24. 



Length of adults about 12-30 cm. Form when resting, compar- 

 atively high and narrow. Epipodial lobes large, completely free to 

 the hind part of the foot. Foward tentacles are mere flat prolonga- 

 tions of the integument on each side of the mouth. The small eyes 

 are forward from the bases of the true tentacles. Foot rather acute 

 posteriorly; mantle or gill-cover with a foramen produced in a 

 small tube in the middle above; the unicellular purple glands open- 

 ing on the under side of its edge. Posteriorly the mantle edge 

 forms a short siphon, in the depth of which lies the anus. Genital 

 opening under the front end of the gill. Behind the genital open- 

 ing is the orifice of the grape-like opaline gland (fig. 24). The 

 albumen gland is orange-red. 



Color deep velvety blackish-violet, frequently with gray or with 

 whitish flecks. Tentacles and edges of epipodial lobes often with a 

 more or less intense red border. Sole and inside of lobes lighter. 



Radula with the formula 30'1'30 to 50 -1-50 when adult, 70-80 

 transverse rows (pi. 33, fig. 23). 



Shell 70 mill, long, 60 broad, 20 high, subquadrangular, convex, 

 thin, subopaque, composed of two layers: the external layer is cor- 

 neous, pale amber-yellow, membranous, and readily separated from 

 the calcareous, vitreous lighter and shining inner layer. Surface 

 with growth lines and obsolete radial folds and grooves. Spire 

 covered by an irregular callous deposit. 



Western basin of the Mediterranean; abundant on the coasts of 

 Italy (Naples, etc.*), Sicily, Algiers, southern coast of France (Gulf 

 of Marseilles, etc.). 



Tethys leporina LINNE, Syst. Nat., 10, p. 563 (founded on Lepus 

 marinus of Rondelet, Lib. de Pise, marinis, p. 520, woodcut). 



