70 CATALOGUE OF 



7. Pisidium milium, Held. 

 [Pis. II, f. 10 ; IV, f . 3 ; XXIX, f. 7-30.] 



1832. Pisidium pulchellum, var. 3 : Jenyns, Trans. Camb. Phil. Soc. iv, 



p. 306, pi. xxi, f. 4 & 5. 

 1836. Pisidium milium : Held, Isis, 1836, col. 281. {Fide Clessin, Malak. 



Blatt. xviii, 1871, 190 ; xix, pi. i, f. 1.] 

 1849. Pisidium gassiesianum : Dupuy, Cat. extram. Gallise Test. [Feb., 



1849] [p. 4] No. 232 : Gassies, Tabl. Moll. Agenaia [Mar., 1849] 



p. 207, pi. ii, f. 11 ; Dupuy, Hist. Nat. Moll. France, 1852, 



p. 685, pi. xxx. f. 7. 



Pisidium normandianum : Dupuy, Cat. extram. Gallise Test. [p. 4] 



No. 235; id., Hist. Nat. Moll. 'Fiance, 1852, p. 686, pi. xxxi, f. 1. 



1854. P'sidium tetragonum, Nob. : Normand, Coup d'ceil Cyclades 



Nord, p. 5. 



1855. Pisidium baudonianum, P. de Cess. : Cessac, Bull. Soc. Sci. Nat. 



La Creuse, ii, p. 74. 



Pisidium arcesforme, n. sp. : Malm, Gotheborgs K. Vet. & Vitt. 



Samh. Handl., N.F. iii, p. 101, figs. 



1856. Pisidium cazertanum, e. normandianum & 77. gassiesianum : Moquin- 



Tandon, Hist. Nat. Moll France, ii, pp. 584 & 585. 



Pisidium pusillum, 8. alligatum, Baudon MS. : Baudon in 



Moquin-Tandon, Hist. Nat. Moll. France, ii, p. 587. 



Pisidium pusitlwn, f. qtiadrilaterum, Baudon IMS.: id., loc. ctt.; 



Baudon, Mern. Soc. Acad. Oise, iii, 1857, p. 333, pi. i, f. D. 



1857. Pisidium qassiesianum, var. C. alliyata, nob. : Baudon, torn. cit. 



pp. 338 & 341, pi. ii, f. A. 

 1859. Pisidium roseum [Jeff, non] Scholtz : Jeffreys, Ann. & Mag. Nat. 



Hist., Ser. in, vol. iii, p. 38, pi. ii, f. 3 a-c ; id., Brit Conch, i, 



1862, p. 26. 

 1890. Pisidium casertanum, var. gassiesianum : Westerlund, Fauna 



palaarct. Region, vii, p. 28. 



That Jenyns failed to recognize the distinctness of this species 

 when he wrote his Monograph is certainly strange, but the 

 examples before him belonged curiously enough to the less common, 

 rounded form. It has of course been long known that Jenyns' 

 Pisidium pulchellum, var. 3 was the form in question, and specimens 

 so marked and endorsed on the bottom of the box " These speci- 

 mens examined and pronounced correct by Revd. L. Jenyns" from 

 the late C. Ashford's collection were in the possession of the late 

 Rev. R. Ashington Bullen. 



As already mentioned (ante, p. 8) Held's name has been adopted 

 for this form on the testimony of Clessin, for, as will be seen, the 

 original diagnosis (77, col. 281) is very scanty, it reads: 



" P. testa globosa, subtrigono-rotundata, albicante, pellucida, 

 striata, margine sub-hebetata, natibus prominulis, retusis." 



In 1849 it/ was recognized in France, and between that date 



and 1857 variously described under different names. From these 



descriptions Baudon's (9, p . 339) may be taken as being the best : 



"Concha tetragona, antice praesertim parum elongata, sub- 



ventricosa, subobliqua, nitida, corneo-lutea aut flavidula; 



margine subrecto ; apice rotundato, prominente, striis regu- 



lurilms, aliis crassis, aliis tcnuibus. Caidine recto, tenui ; 



