122 
articulo ultimo crasso ovali, apice subtruncato. Antenne sat longe, 
articulo 3t° vix 4 longiori, 7™° ceteris parim crassiori, hoc et reli- 
quis preecedentibus paullo latioribus. Prothorax rotundatus anticé 
et posticé subtruncatus, capite multo latior. Elytra brevia oblongo- 
ovalia, thorace latiora, convexa, punctato-striata. Pedes satis elon- 
gati, femoribus anticis crassis ante apicem interné dente valido cur- 
vato armatis ; tibize anticee ante medium paulld extus curvate ; inter- 
mediz intus subserratz ; postice recte. 
Foemina differt capite et prothorace paulld minoribus, hoc minus 
rotundato, pedibus anticis brevioribus et gracilioribus, dente fe- 
morum anticorum multd minori, tibiisque anticis minus curvatis, 
tibiisque intermediis haud serrulatis. . 
MeEGacanTHA TENEBROSA. Meg. nigra subnitida punctata, elytris 
striato-punctatis, angulis humeralibus distinctis. 
Long. corp. lin. 95-10; lat. elytr. lin. 43. 
Hab. Ashantee. In mus. D. Hope. 
Caput nigrum punctatum, clypeus brevis vix e vertice separatus. 
Oculi intus subapproximati, lunula tenui levi subnitida et subelevata 
interjecta, tuberculi anteoculares magni, basin antennarum tegentes. 
Prothorax tenué punctatissimus lateribus rotundatis, angulis anticis 
acutis, posticis subacutis. Hlytra sat profunde 8 striato-punctata ; 
stridque altera valdé abbreviata versus scutellum; striis 4 et 5, 3 et 
6, et 2 et 7, posticé conjunctis. Pedes et corpus infra nigra subni- 
tida. 
An Helops dentatus, Fab. ? 
Mr. Reeve then communicated to the Meeting ‘‘ Descriptions of 
four new species of bivalve shells by Mr. Hanley.” 
Genus Souen. 
Soren acuminatus. Sol. testa albidd, epidermide tenui griseo- 
viridescente indutd, elongata, latitudine longitudinem tripliciter 
superante ; postice rotundatd ; antice acuminatd extremitate rotun- 
datd; marginibus arcuatis, ventrali. prope in medio incurvaté ; 
dentibus in utraque valvdé duobus, angustis, uno valdé minore. 
Long. ?; lat. 23 poll. 
Hab. in flumine Hoogley, Indiarum Orientalium. 
This shell, which has been found in great abundance at the mouth 
of the river Hoogley, is somewhat allied to the Solen acutidens of 
Broderip ; it is, however, well distinguished by its anterior acumi- 
nation. 
Genus PsamMmosia. 
PsamMosia costata. Psam. testd subellipticd, antic angulatd ; 
postice breviore angustatd, extremitate rotundatd ; pallidé, radiis 
angustis roseo-lividis ornatd; transversim irregulariter costatd, 
costis rudibus, planulatis, anticé subfurcatis ; intus vel purpured, 
vel aured. 
Long. 1; lat. 12 poll. 
Alab. ad oras Nove Zealandiz. 
