152 



IV. Varieties of Spirifer disjunctus Sow, from unknown 

 localities in China. 



In describing the two varieties of Spirifer disjunctus collected by 

 Yamada it has already been noticed that there is one example of each of them 

 which was bought in China by Y. Yabe. There are three other varieties, in 

 Pellizzari's sense, among these purchased examples ; they are A) Spirifer 

 disjunctus Sow, var. vicari Pellizzari, B) cfr. var. gortnni Pellizzari and 

 C) var. lonsdalci Murchison. Although they do not seem worthy of descrip- 

 tion, it may be of some interest to give their pictures which satisfy the dia- 

 gnoses of these forms given by Pellizzari. 



A) Spirifer disjunctus Sow. var. vicari Pellizzari. 



PI. XXIV., Fig. 3. 



T913. Spirifer disjunctus var. 7>icarii, Pellizzari : — op. cit., pp. 36 and 

 39. pi. I., fig. 7. 



" Conchiglia grande, depressa, con le valve della medesima grandezza, a 

 contorno nettamente lirato, poco piu largo che alto. Area allungata, lineare, 

 cinque volute piu lunga, che alta, con apertura triangolare, equilatera. Apice 

 della grande valva piccolissimo, acuto, diritto, non rigonfio. Lobo nettamente 

 delimitate ; seno svasato, con limite un po' incerti. Linea cardinale leggermente 

 inferiore alia massima larghezza della conchiglia, che c verso la meta dell' 

 altezza. Seno e lobo percorsi da 12 pieghe ; piu di 30 pieghe corrono su 

 ciascuna della regioni laterali." 

 Dimensions : — 



Length. Width (Hinge-line). Thickness. Height of Area. 



25 mm. 34 mm. 18 mm. ca. 4 mm. 



Remarks : — The material consists of only one . example of rather good 

 preservation. There is a slight but somewhat remarkable difference between 

 the specimen and the figure given by Pellizzari. First of all the Chinese 

 fossil has a prolonged hinge-line, thus having quite acutely pointed cardinal 

 extremities. Then the median sinus and fold appear to be somewhat better 



