37 



fur Gould's species deserves to be kept; from Panopnsa Faujasii M. de la Groyo 

 (Ann. du iiiis. vol 9, j). "131. pi. 12, 1807; I'astorot. Foss. de Bordeaux, jt. 9;"): 

 riiii., Ell. Moll. Sic. vol. 1. p. 7, pi. 2, s. 3.; Goldfuss, IVtr. Germ. v..!. 2, p. 

 271, pi. 15!), f. 1; Sow, .Min. Conch, pi. Gil, C. 3 it 4; \\Viiik;uitV, Cnth. .1. 

 -Mitfelm. vol. 1. p. 22 as V. glyciiiieris Born; Wood, Cray; Moll. II, p. 2.S3, jd. 

 27, f. I), Lamarck"s rano[iaea Alilvovaiidi, 1 do not find any eon.staiit dilVenMur. 

 For stniiglitness of the ii]ii)er margin and nearly eipial hroadness of the 

 ])osterior and anturiov part el" the i-^hell an- also found ainnn;;- the b(>eciinrns of 

 1'. Faujasii, and even the direetiou of the lines of growth {and of the irregular, 

 t^iimewhat coarse folds or coneentrieal rilis which in both species are jiarallel to these 

 lines of growth) arc sometimes nearly parallel to the upjier part of the shell in 

 both the I', generosii and I'aujasii, and the deviations from that direetinn (in 1'. 

 Faujasii. as e. g. Goldfuss" very good ligme e.xliiliits, mure eonvergent to the- pos- 

 terior siile of the uiii)er margin ; in I', generosa, as Gould's tigure shows, divergent 

 from itj seem neither to become very great, nor to be always of the .same natnre. 

 The liinge and the pallial sinus do not exhibit any [leeuliar characters. 



The shell is found recent in the northern part of the Facilie, and if the 

 idi-ntilication with 1'. Faujasii is tenable, in the Jlediteriaiiean and near the 

 Atlantic coasts of S[iain and I'Dvlugal. Tlii_; boreal form ot' the Atlantic Sea is 

 witlely ditfereiit, and even supjiosed to belong to another genus. The Yesso shell 

 ilescribed by (iould as 1*. fragilis and identilied with V. Japonica Adams by 

 Ijschke (Japan. Meeres (üonch. 111. |i. I(i4l is ditl'rrent in si/.e |2 by 1.5 inches 

 instead ol' (i by 4>, lias a lissuiv i>( the U[i[ier margin near the base of the tooth 

 and a veiy thin shell. 



LifOi>»ia ( I'andniina) ßabellald Gould. 

 (Otia Conch, p. 102.). 



Two very small S|iecimcns are (buiid at Oji, not larger than I and 3 millim., 

 I)Ut iu all eharaetors (ratio of length to la'ight about 17 : 10, thieliiiess very 

 slight, rountled anterior ]>art and nmch truncated, obliipiely and feebly folded 

 hind i«art, ln^aks at ', ol' lenglli from the anterior margin, straight uppir margin, 

 very feeble bingo and nacreous interior) perfectly resendiling this .Arctic s[)ecies 

 of the r.icilie Ocean. I I'eci obliged to mention them in sjiite of their scarcity 

 and of the minuteness of (he speeimcns of a form attaining nmch larg(M' dimen- 

 sions, as tliey seem to lie not unini]Kir(aiit as to the character of tin; fauna. 



Miiuilnra Jluctunxu (lould. 

 (Ot.iaeonchol. p. Mil.). 



To (fould's tliagnosis (^small, thin, conccntrieally dlrialed or ratiier Ibldcd, 

 nc.irly eipiilateral shell, posteriorly a little smalK-r, triangular with somewhat 

 truni;jiteil end, right valve convc.v, length to height w S to 7) the lew specimens 

 ftiund ill Oji give smne additional points. The largest specimiii of a right valvo 

 hiw 15 niillini. in length and 1.3 millim. in height, nearly the donble si/,n of 



