Zoological Society. 537 



acutis, posticis subacutis. Elytra sat profundi 8 striato-punctata ; 

 striaque altera valde abbreviate versus scutellum ; striis 4 et 5, 3 et 

 6, et 2 et 7, postice 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." 



Solen acuminatus. Sol. testd albidd, epidermide tenui griseo- 

 viridescente indutd, elongatd, latitudine longitudinem tripliciter 

 superante ; postice. rotundatd ; antice acuminatd extremitate rotun- 

 datd ; marginibus arcuatis, ventrali prope in medio incurvatd ; 

 dentibus in utraque valvd duobus, angustis, uno valde minore. 



Long. | ; lat. 2 J 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 well distinguished by its anterior acumination. 



Psammobia costata. Psam. testa subellipticd, antice angulatd; 

 postice breviore angustatd, extremitate rotundatd; pallida, radiis 

 angustis roseo-lividis ornatd ; transversim irregulariter costatd, 

 costis rudibus, planulatis, antice subfurcatis ; intus vel purpured, 

 vel aured. 



Long. 1 ; lat. 1J poll. 



Hab. ad oras Novae Zealandia?. 



The coarse and somewhat prominent ribs render this shell easily 

 distinguishable from the rest of the Psammobia. 



Cytherea effossa. Cyth. testd ovali-subcordiformi, subcequilaterali, 

 crassd, nitidd, convexd, transversim profundi sulcatd ; sulcis sub- 

 remotis, interstitiis planulatis ; albido-lividd, lineis angularibus, 

 saturatioribus , venulatd; ano impresso, lanceolato ; vulva effossa 

 lateribus candidis, fasciis spadiceis undulatis, transversim pictd ; 

 disco interno purpureo, marginibus crenatis. 



Long. | ; lat. l£ poll. Mus. Stainforth. 



Hab. ? 



The very singular manner in which this and the following species 

 are excavated on the anterior side forms their prominent and distin- 

 guishing characteristic. 



Cytherea excavata. Cyth. testd rotundato-ovatd, subtequilaterali, 

 postice expansd, antice propter marginis ventralis obliquam curva- 

 tionem angustatd ; crassd, lavi, nitidd, depresso- convexd, pallid e 

 fulvd, venis lividis angularibus, plus minusve distinctis, marmoratd ; 

 ano lanceolato ; vulva valde excavatd, lateribus planulatis, candidis, 

 spadiceo leviter venulatis ; disco interno roseo ; marginibus tenuiter 

 crenulatis. 



Long. 1 ; lat. 1£ poll. Mus. Stainforth. 



Hab. ? 



This shell resembles the preceding by its anterior excavation, but 

 differs both in shape and in the absence of the transverse grooves. 



Ann. $ Mag. N. Hist. Vol. xi. Suppl. 2 N 



