252 THE HALIOTIS, OR PEARLY EAR-SHELL. 
The animal (Fig. 44; a, tentacle; 5, eyes; c, holes in 
the shell for the passage of the tentacles, d and f; e, foot) 
adheres to the rock like the Patellas and Fissurellas. To 
the latter genus it is somewhat allied through its anatomy ; 
the arrangement of the teeth upon the lingual ribbon is said 
to be like that of Trochus. Cuvier found that every indi- | 
vidual he examined had an ovary, and therefore concluded 

Fig. 44. 
€ 

e 
that the Haliotides were hermaphrodites.* Swainson con- 
sidered them as occupying a position among the phytopha- 
gous, or vegetable eating gasteropods, analogous to the 
Volutide among the Zoophaga, or carnivorous mollusks; 
the analogy hone partieularly apparent by a comparison of 
Haliotis with the Melo group of the Volutes. 
The chief peculiarity of these animals is, that their shells 
are perforated with a regular series of holes for the passage 

*In July, 1867, specimens of the shells py Haliotis, aray Monterey, were receiv ed by 
me, which combined the raider the two very distinct species, H. rufescens 
and racherodii, to à remarkable degree. These. dien ul forms are of ext eed- 
ingly rare occurrence, a he great n r of specimens tha ve examined, I 
ave been u —— obtain additional tuere ms. The specimens referred to 1m 
ressed me eing hybrids, : If fident that farther investigation will COT 
roborate ie Meri n that species of Haliotis will oc casionally cro (Proceedings of 
the 
California Academy of Sciences, Vol. iii, p. 361.) 

