REPORT ON THE MARSENIAD/E. 



13 



Lamellae mandibulares validiores, structura uniformi (quasi honiogena). Dens medianus 

 radulae basi (fere semper) bifidus ; dens lateralis magnus, dorso fissus, hanio curvato mar- 

 ginibus serrulato. Proventriculus non deest. Pars inferior varis deferentis in cavitate 

 abdominali pro parte libera. 



Testa interna calcarea, lactea, nonnihil diaphana, laevis, obovata, spirata, anfractibus 

 vix tribus ; spira ad j longitudinis sita, prominenti, acutiuscula, anfractibus vix duobus ; 

 apertura ampla, ovata, patente usque in fundum spirse, columella antice sinu levi excisa. 



( 1. Marsenia tentaculata (Mtg.). 

 Mare atlant. orient. 



2. Marsenia producta, Leach. 

 Mare atlant. orient. 



3. Marsenia perspicua l (Linne). 

 Var. (?) Morelli, Delle Chiaje. 

 Mare mediterr. 



4. Marsenia dubia, n. sp. 

 Mare atlant. orient. (Cape Verde). 



5. Marsenia pellucida (Verrill). 

 Mare atlant. occid. 



Marsenia stearnsii (Dall). 



Mare pacific. (Californ.). 

 Marsenia orhiculata (Dall). 



Mare pacific. (Californ.). 

 Marsenia latens (O. Fr. Miiller). 



Mare atlant. or. sept. 

 9. (?) Marsenia rangii, Bgh. 



Mare antillense. 

 10. Marsenia minuta (H. Adams). 



Mare rubruni. 



6. 



8. 



11. Marsenia cabulana, Bgh., n. sp. 



Mare philippin. 



12. Marsenia afpnis, Bgh., n. sp. 



Mare philippin. 



13. Marsenia gemma, Bgh., n. sp. 



Mare philippin. 



14. Marsenia indecora, Bgh., n. sp. 



Mare philippin. 



15. Marsenia isabellina, Bgh., n. sp. 



Mare philippin. 



16. Marsenia diegcensis (Dall), n. sp. 



Mare pacific. 



17. Marsenia ophione (Gray). 



Mare pacific. (Nov. Zel.). 



18. Marsenia Kerguelenensis (Studer). 



Mare pacific, australe. 



1 9. Marsenia (?) translucida, Blv. 



Hob. ? 



20. Marsenia depressa, Wood. 



Crag (Sutton). 



II. Chelyonotus (/Swains.), Bergb. 



Animalia dioecia, Marseniis propriis similia ; sed plica respiratoria producta, apice 

 interdum bifida. Lamellae brancbiales fere ut in Marseniis. — Lamellae mandibulares et 

 armatura lingualis fere ut in Marseniis, sicut proventriculus. Vas deferens in cavitate 

 abdominali non liberum sed in pariete abdominali omnino inclusum. 



Testa interna fere omnino ut in Marseniis sed magis calcarea. 



1. Chelyonotus semperi, Bgh. 



Mare philippin. 



2. Chelyonotus tonganus (Quoy et Gaim.). 



Mare indicum. 



3. Chelyonotus tuberosus (Stimpson). 



Mare chinense. 



4. Chelyonotus (?) punctatus (Stimpson). 



Mare chinense. 



1 The species indicated by larger italic type have been anatomically examined by the author. The bracket 

 indicates that the species enclosed by it are nearly related to each other. 



