66 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



rather thin and fragile form. The right-hand shell I have made 

 drawings of and propose as the type of Gassies's limosum ; it may be 

 known by the broken ventral edge of the left valve. 4 shells stuck 

 on blue paper, are small P. casertanum. These, evidently a 

 subsequent addition, make up the present total of six shells on 

 the card. 



Card No. 132c. " P. casertanum, var. C. = P. cinereum, Alder. 

 Pont de la Maye — Gradignan." 



5 perfect shells and 1 left valve. 



Under the fourth is a figure " 3 ", and on the back of the 

 . card is written in ink (over a pencil scribble " nitidum ") 

 " 3. nitidum Jen. / (Fide Jefir.)" This fourth shell (" 3 ") 

 certainly did look like P. nitidum before I opened it, as did 

 also the next shell to it (the third), but upon examination 

 of the hinges they both proved to be small very equilateral 

 examples of P. ca$ertanum, and I have but little doubt that 

 they are river-shells. The other three shells and the odd 

 left valve are ordinary P. casertanum, similar to the smaller 

 shells on the card ISTo. 132. They are, of course, equally 

 referable to P. cinereum of Alder, which is synonymous with 

 P. casertanum. 

 Card No. 133. " Pis. pulchelhom, Jennyns [sic]. 

 Bruges — Alices Boutant, &c." 



6 shells : perfect. 



All the six shells are P. subtruncatum, Malm, but as Jenyns 

 included this species as a var. of his P. pulchellum, they 

 are not therefore wrongly named. 



Card No. 134. " P. Henslowianum, Typus. Tellina, Shepp. 

 Cycl. appendiculata Leach. La Garonne. Paillet-Langon." 

 6 perfect shells and 1 odd right valve. 



The first shell on the card is a beautiful example of the 

 veritable P. pulchellum of Jenyns. The second is a very 

 thickened, small shell, referable to P. supinum, A. Schmidt 

 (= P. conicum, Baudon). The third is a small (not adult) 

 P. henslowanum, Sheppard. The remainder, including the 

 odd valve, are all P. subtruncatum, Malm. On the back of 

 the card is scribbled " fontinalis ", in pencil. 



Card No. 134b. " P. Henslowianum. Var. B. nonappendiculee Gass. 

 Langoiran. Eare." 



4 perfect shells and a space where a fifth bad been. 

 The first shell is a remarkable example of P. nitidum, Jenyns, 

 referable to a large oval form of my var. crassa. The second 

 shell is a beautifal P. casertanum var. ponderosa mihi.^ 

 The third and fourth are correspondingly thickened shells of 

 P. subtruncatum, Malm. 



^ See Journal of Conchology, vol. xv, 1918, p. 294, pL -vii, f . 31-34 



