1879.] NATURAL SCIENCES OF PHILADELPHIA. 129 



2. Middle part of a row;* a, rhachidian with 12 laterals; b, 



twelfth lateral, *fi. 



Diauhda Sandiegensis (Cooper). 



3. Papillae of the back. 



4. Outer part of two rows of teeth with 6-8 teeth ;* aa, outermost 



teeth, Sffi. 



5. Inner part of two rows ;* aa, first teeth, ^. 



Diaulula Sandiegensis (C.) var. 



6. Two innermost teeth,* ~ . 



7. 7. Outer part of two rows 'with 5 and 2 teeth;* aa, outermost, 



3 n 



8. a, first part of the spermato-duct ; 6, prostate ; c, spermato- 



duct ; d, penis ; e, vestibulum genitale. 



9. Penis opened with the glans and spermato-duct. 



Lamellidoris bilamellata (L.) var. Paoifica. 



10. Dorsal papilla},* 1 ;'. 



Akiodoris lutescens, Bergh. 



1 1 . Dorsal papilla,* if*. 



12. Spicula from the rhinophoria,* ~. 



13. Glans penis from the side. 



14. Glaus penis from the end. 



Cadlina repanda (A. & H.). 



15. Lateral tooth from behind,* 1 ~. 



Plate VI. 



Akiodoris lutescens, Bergh. 



1. Median part of a row of teeth ;* a, rhachidian ; bb, first lateral ; 



cc, second lateral; d, third lateral, 3 -~. 



2. The rest of the same row;* e, the fourth tooth; /, the thir- 



teenth, ^p. 



3. The rhachidian tooth, obliquely,* ^-. 



4. a, first, and 6, second lateral teeth from one side,* ~. 



5. First tooth, anterior margin, from above,* 3 ~. 



6. a, first, and 6, second tooth from behind,* 3 J-. 



