( 71 ) 



FAMILY III. SIGARETOIDA. 



GENERA. 



Tentacula conical. 



1. SlGARETUS. &IV. 



A notch and semi-canal 

 in front, conducting the 

 water into the branchial 

 cavity. PI. 14, fig. 15, 16. 



2. Cryptostoma. Blainv. 



Foot enormous, four or Tentacula short, co- 

 five times larger than the nical, with appendages 

 body; mouth hidden un- at the base, 

 der the anterior edge of 

 the shell. 



Eyes at outer base of 

 the tentacula. 



ORDER VI. SCUTIBRANCHI. 



1. Halyotis. Lin. 



Shell turbinated. Pi. 5. 

 fig. 24. 



GENERA. 



a. Halyotis. Lam. (1) 



Mouth a short trunk. 

 PI. 13, fig. 21. PJ. 14, 

 fig. 20. PI. 19, fig. 3, 



4, 5. 



b. Padolla. 



c. Stomatia. (2) 



2. Capulus. Montf. 



Shell conical • branchiae 

 on the anterior edge of 

 the cavity : trunk rather 

 long; a folded membra- 

 nous veil under the neck. 

 PL 16, fig. 7. 



Tentacula lon^, some Eyes on two cylindrical 

 at the edges of the cavity stems, 

 of the branchiae, and pass- 

 ing through the last holes 

 of the shell. 



2 Conical tentacula. 



Eyes on the outer base 

 of the tentacula. 



(1) The mantle is deeply cleft on the right side, and the water which passe« 

 through the holes of the shell, proceeds by this cleft into the branchial cavity. There 

 are three or four filaments along the edges of the mantle, which the animal has the 

 power ot pushing out through the holes. 



(2) The animal is *iol known : it may possibly belong to the Pectinibvanclu. 



