FAMILY OF BUCCINOIDES. 



LESSON IV. 



FAMILY OF BUCCINOIDES. Buccinum Buccinum properly so 



called Harpa Purpvra Cassis Cerithium Murex 



Strombus Voluta Ovula Cypr&a Convs. 

 FAMILY OF PECTINIBRANCHIATA CAPULOIDA. Pileopsis 



Hypponyx Crepidula Calyptraa Siphonaria Siga- 



retus. 



ORDER OF GASTEROPODA TUBULIBRAWCHIATA. 

 ORDER OF GASTEROPODA SCUTIBRANGHIATA. Haliotis Fis- 



surella Emarginula . 

 ORDER OF GASTEROPODA CYCLOBRANCHIATA. Patella ~ 



Chiton. 



ORDER OF GASTEROPODA INFEROBRANCHIATA. 

 ORDER OF GASTEROPODA TECTIBRANCHIATA. Pleurobran* 



chus Aplysia Dolabella Bullea Bvlla. 

 ORDER OF GASTEROPODA NUDIBRANCHIATA. Eolidia 



Glaucus. 



ORDER OF GASTEROPODA HETEROPODA. Carinaria. 

 CLASS OF MOLLUSCA PTEROPODA. Clio borealis. 



1. In the FAMILY OF BUCCINOIDES, the shell is spiral, and in 

 its aperture, near the extremity of the cohimella, there is a canai 

 or notch, serving for the passage of the syphon or respiratory 

 tube (fg. 56), which is formed by a fold of the mantle, ana 

 destined to afford the animal the power of breathing, without 

 going out of its shell. This family is divided into three tribes, 

 namely : Buccinum, Murex, and Angiostoma. 



2. The TRIBE OF BUCCINUM comprises all the Buccinoides in 



which the shell is with- 

 out a plica (fold) in its 

 columella, but is fur- 

 nished with a notch or 

 short canal inflected 

 towards the left, and its 

 aperture is very large. 

 The foot of these mol- 

 lusks is generally of 

 Fig. 56.-voLUTA. moderate length, and 



rounded in front (jigs. 33 and 34.) The mantle is unprovided 

 with fringe, and is prolonged anteriorly into a long canal, which 



1. What are the characters of the shell in the family of Buccinoides ? 

 Into how many tribes is this family divided ? 



2. How is the tribe of Buc'cinura characterized ? (Buccinum, Latin a 

 trumpet) 



