46 AGLAJA. 



hind edge of the mantle, the left one bearing a flagellum. The head 

 disk is smaller and more trapezoidal than in the other Mediterranean 

 species. The foot occupies the front three-fourths of the entire 

 length of the body. 



A. DEPICTA Renier. PI 12, figs. 63-70 ; pi. 1, fig. 12 (x 7); pi. 13, 



f. 76, 77. 



Back of the body and outside of pleuropodial lobes chestnut, 

 brown, blue-gray or violet-black, maculated and marbled with 

 white. Head-shield and lateral lobes edged with two narrow stripes, 

 one blue, the other yellow. Head-shield with two short stripes of 

 buff in front. Sole velvety-black or violet-brown, sometimes orna- 

 mented with whitish spots. Gill orange or pale brownish. Posterior 

 lobes of mantle joined, the left one with no flagellum. Length 35-60 

 mill. 



The shell (pi. 12, f. 63, 64, 68, 70 ; pi. 1, f. 12) is not so different 

 from that of A. tricolorata as would be thought from the figures ; 

 but the small spire is more solute, and the projecting process is 

 smaller ; the large thin outer whorl shows 2 or 3 more or less dis- 

 tinctly marked growth-zones ; this quite cuticular, pale yellowish 

 part is in some individuals, especially the younger ones, more or 

 less calcified, excepting always the anterior part; in the large indi- 

 viduals it was completely cuticular. Diam. from edge to edge 

 across spire, 7-12 mm. In a large individual, length 55 mill., the 

 the shell measured in greatest length 16? mill. 



Mediterranean Sea. 



Aglaja depicta RENIER, Tav. di Class., 1807, pi. 8 ; Oss. Posthume, 

 p. 4, 7, pi. 16, f. 1-11. Doridium depictum BERGH, Mittheil. Zool. 

 Stat. Neap., xi, p. 123, pi. 8, f. 11-13, 17 ; Bull. Mus. Comp. Zool., 

 xxv, p. 209, pi. 10, f. 9 ; pi. 12, f. 3. Doridium coriaceum and D. 

 membranaceum MECKEL, Beytrage zur Vergl. Anat. i, 2te Heft, p. 

 33, (1809). Aeera carnosa CUVIER, Mem. sur les Acres, Ann. Mus. 

 H. N. Paris, xvi, p. 9-12, 14-15, pi. 1, f. 15-20, (1810) Doridium 

 carnosum DELLE CHIAJE, Mem. sulla Storia e Notomia, etc., i, pi. 

 76, f. 9-11 ; pi. 107, f. 2. VAYSSIERE, Rech. Moll. Opistobr., p. 45, 

 pi. 2, f. 42-44. Doridium aplysiaeforme DELLE CHIAJE, Mem. ii, 

 p. 185-192, pi. 13; t. 80, f. 23, (1825). Acera aplysiaeformis CAN- 

 TRAINE, Malac. Medit., p. 74. Eidothea marmorata Risso, Hist. 

 Nat. Eur. Merid., iv, p. 46, pi. 1, f. 9. Doridium marmoratum CAN- 

 TRAINE, Bull, de 1'Acad. Roy. desSci. de Bruxelles, 1835, ii, p. 386. 

 Acera marmorata CANTRAINE, Mai. Medit. et Lit., p. 73, pi. 2, f. 

 2. 



