guppy: mollusca of gulf of paria. 153 



characters. I have, in a few instances, renamed the orders, not 

 being able to find any satisfactory terms in use; but wherever I 

 have done so I have derived the ordinal name from the most 

 characteristic genus of the order. 



Sub-kingdom MOLLUSCA. 



Class CEPHALOPODA. 



Order Octopoda. 



Octopus Cuvier. 



1. O. americanus Orb. 



0. vulgaris, D'Orbigny, Moll. Cuba, vol: i., p. 11, pi. i., f. i. 



6>r(/i?r Decapod A. 



LoLiGO Lamarck 1799. 



2. L. plei Blainv. D'Orb. Moll. Cuba, vol. i., p. 42. 



Sepioteuthis Ferussac 1825. 



3. S. sepioidea Blainv. Orb. Moll. Cuba, vol. i., p. 34. 



Spirula Lamarck 1799. 



4. Sp. fragiiis Lam. 



Sub-class SOLENOCONCHIA. 



Dentalium Linne 1740. 



5. D. disparile Orb. Moll. Cuba, vol. ii., p. 202, pi. xxv., 



f. 14-17- 



"Class GASTROPODA. 



Oj-der Tectibranchiata. 



NoTARCHUs Cuvier 18 17, 



6. N. laciniatus Riippell. Gray, Fig. Moll, pi, clii., f. i. 



AcLESiA Rang 1828. 



7. Aci. sp. indet. 



Aplysia Linne 1767. 



8. Apl. nigra Orb., Voy. Amer., Mer., p. 209, pi. xviii., f. 1, 2. 



9. Apl. sp. indet. 



