MAUIJELLA. 



205 



phores, as in figure. The penis is provided with a small kale-sac 

 and gives off a short caecum ; the retractor muscle is attached to 

 the bend. 



The radula has a broad band of wider median teeth, tricuspid as 

 a rule, and these pass into bicuspid outer laterals, with the two 

 cusps subequal and terminal as in Girasia. 



From Girasia the present genus is separated by its almost im- 

 perforate shield, the more solid shell of different form, and by 

 several small distinctions in the genitalia. 



[Fig. 71. Marietta dussumieri. 

 Dark olivaceous-green specimen. 



A. Animal, view of right side and from above. 



B. Shell. X3'4. 



Black specimen. 



C. Genitalia. x2. 



C'. Spermatophore. X3'4. 



Marialla beddomci. 



D. Shell. xl'S.] 



Xl'8. 



310. Mariaella dussumieri, Gray, Cat. Pulm. . M. 1855, p. 63 



Fischer (Viquesnelia), Journ. Conchy I. 1856, p. 290, pi. 3, fig. 18; 

 Webb, Proc. Mai. Soc. iii, 1878, p. 153, pi. 9, figs. J-6 (animal, 

 shell, and anatomy) ; Cockerell, 'Nautilus, xii, 1898, p. 9 ; Godwin- 

 Austin, Mol Ind. ii, 1899, p. 113, pi. 93, figs. 1-1 c, 2-2 c 

 (animal, shell, and anatomy). 



