41 



Unio aquilina. Soic. 



Unio carbonarius. Bronn. 



Unio centralis. Sow. 



Unio compressus. Sow. 



Unio concinnus. Sow. Flem. 



Unio cordiformis. Sow. 



Unio crassissimus. 1 Soiv. Flem. 



Unio crassiusculus. Sow. Flem. 



Unio depressus. Sotv. 



Unio diluvii. D'Orb. 



Unio distortis. Bean. 



Unio dolobratus. <SW. 



Unio Gualterii. Fitton. 



Unio hybridus. Sow. Flem. 



Unio liasinus. *SW. 



Unio Listen. Soiv. Flem. 



Unio Mantellii. Fitton. 



Unio Martinii. Fitton. 



Unio Menkei. Koch. 



Unio modiolaris. $ow. 



Unio Nilssoni. Koch. 



Unio nuciformis. Hibb. 



Unio orthonotus. Com. 



Unio ovalis. Turton. 



Unio parallelus. /SW. 



Unio petrosus. iliori. 



Unio peregrinus. Phil. 



Unio phaseolus. *S)w. 



Unio pictorum. Lam. 



Unio porrectus. Sow. 



Unio primigenius. Cow. 



Unio robustus. Sow. 



Unio saxulum. Mort. 



Unio Solandri. *SW. Flem. 



Unio Staffenensis. Forbes. 



Unio subconstrictus. »SW . Flem. 



Unio subsinuatus. Koch. 



Unio subtruncatus. Fitton. 



Unio tellinarius. Goldfuss. 



Unio terrenus. il/ori. 



Unio trigonus. Ro'mer. 



Unio truncatosa. Mich. 



Unio tumidus. jRete. 



Unio tumulatis. Mort. 



Unio uniformis. <SW. Flem. 



Unio Urii. Flem. 



Unio Valdensis. Mantell. 



Unio Voltzii. Koch. 



Unio . Sow. 2 



• This name was preoccupied by Ferussac, but his C. crassissimus is t/. cj-bssms, Retz., and, therefore, Sowerby's 

 name must stand. 



2 Referred to by figure in .Mk/. TVai. i?ts£. ; vol. ii. p. 647. It has the form of Uttoralis, and is found at 

 "Gray's." 



11 



