24-1 



TERRESTRIAL AIR-BREATHING MOLLUSKS. 



The above is the original description from Proc. Boston Soc. Nat. Hist. 



Spurious Species of Veronicella. 



The following species are catalogued by Grateloup among the American Vaginuli 

 (Dist. Geog. des Limaciens, 22). They were all described by Rafinesque, and 

 by him placed in his genus Philornyciis (see Binney and Tryon, reprint). From 

 the general inaccuracy of that author, as well as the deficiency of the descrip- 

 tions, I think they should be excluded from this or any genus : — 

 Vaginulus flexuolaris, Vaginulus (xn/unis, 



Vagimdusfuscus, Vaginulus guadrilics. 



Fig. 141. 



B. notabilis, partially extended, en- 

 larged. 



BINNEY A, J. G. CooPER.i 



Animal beliciform, obtuse before, rapidly acuminated behind ; mantle sub- 

 central, extending anteriorly beyond the shell ; a distinct locomotive disk ; no 



caudal mucus pore; respiratory oriBce poste- 

 rior, on the right edge of the mantle; anal 

 orifice contiguous to last : genital orifice behind 

 the right eye-peduncle. 



Shell entirely external, ear-shaped, nearly 

 fiat, about one third as long as the animal, 

 which it does not half cover when retracted. 

 Spire flattened, forming two horizontal volu- 

 tions, last whorl enormously expanded and 

 slightly arched. Columella distinct, entire, hiding the interior of the convo- 

 lutions; peristome simple, acute. In estivation the part of the animal ex- 

 cluded from the shell is protected by a thick, 

 white, parchment-like epiphragm. 



A senus of the Mexican fauna, whence it 

 has been introduced on Guadelupe Island 

 off the west coast of Mexico, and Santa 

 Barbara Island, coast of California. 



The jaw is thick, slightly arcuate, ends 

 blunt ; anterior surface with six well-developed ribs, denticulating either mar- 

 gin, situated on the central third of the jaw, and as many subobsolete ribs on 

 each outer third; no median projection. (Fig. 142.) 



1 Animal heliciforme, antice obtusum, postice rapide acuminatum. Pallium subcen- 

 trale, extra testam antrorsum prolongatum. Discus gressorius distinctus. Porus mucosus 

 caudalis nulhis. Apertura respiratoria et analis ad dextram sita, in parte posteriore mar- 

 ginis pallii. Apertura genitaUs post tentaculam dextram oculigeram. 



Testa externa, paucispira, haliotoidea, animal non includens. Pars exclusa in hibemis 

 epiphragmate albido, duro, membraneo protecta. 



Maxilla arcuata, costis validis exarata. Deutes linguales quadratse, centrales tricuspi- 

 datse, laterales et marginales bicuspidatae. 



¥ig 142. 



Jaw of B. notabilis. 



