1 1M SKIM A. 



arms long, slender. unequal, order of length 4. '2. 1. '> ; tentacles 

 lon-. slender, tin- cups in live rows. central row largest with 

 oblique rings toothed all around. Purplish, with oblong p:ilr 

 spots on tin- sides. Shell elongate, very narrow, finely wrinkled 

 above, aemninated in front, and with a long. a<Mite l>eak. and 



wiiiiis on the side behind. Total length. 1 foot. 



Tenerife,. 



S. PLA.\(.ON. (Jrav. 



l)od\ oblong; tins narrow, pale; back of mantle niueh pro- 

 dueed in front ; arms Hither thick, with the (Mips small and dis- 

 tant ; tentacles slightly clavate. with a few very small, sub-equal 

 (Mips. Shell elongated, narrow, dilated behind: apex elongated. 

 acute, recurved; cavity concave behind, with a strong, shelly, 

 diverging ridge on each side and a wide central groove. 



Australia. 



Not figured, (iray adds that the shell is most like that of 

 S. Orbigmjnnn. but lias not the ridges on the inner part. 



* * * Tentacular arms with unequal-sized cups in ten sent*. 



S. SAVTGNII. P>lainv. PI. '.><). lig. 414; pi. 111. fig. 41 :;. 



Body ovate, oblong ; back with triangular beards, forming a 

 series on the sides, smooth below; tins broad ; arms thick, very 

 unequal, order of length 4. :>. 2. l.the rings of the (Mips toothed; 

 two middle lines of suckers of the tentacles larger, with toothed 

 rings. Shell ovate, oblong, rounded at each end. concentrically 

 wrinkled, nearly Hat above; strongly gibbous and elevated in 

 the middle beneat h. wit h a bonier all around. Length. U inches 



Red Sen. 

 S. AI'AMA. (Jray. 



Animal unknown. Shell oblong, elongate: posterior part 

 much prod lice* 1. sub-acute, with a strong callosity at the posterior 

 edge of the cavity; apex blunt, rugose; anterior extremity 

 rounded, covered with a strong cartilaginous side; central por- 

 tion rather convex. 



Australia. 



Not figured.- Shell said to resemble that of S. Saviyttii. but 

 the posterior extremity is much more produced and sub-acute, 

 and the inner side of the central part is not convex. 



