GALATEA. 



Plate II. 



Species 2. (Mus. Sowerby.) 



VLATEA CONCAMERATA. Gul. tl'itd OVali-SllilnffOIIti, 



snhcompressd, poiiderosd, regulari, laviyatd, epidermide 

 obscurissime riidiutd, ititus ad marginem cardinalem 

 palUde purpurnl, noununqnam ad margines lateraJes 

 et ventralem rosed, aniice infra denies lamella septi- 

 j'ornii obliqud coucameratd ; deniibua crasm, in valvd 

 de.rtrd nm centrali magno, divino, divaricato ; latere 

 postico obtuse anr/ulato, ante angulmn lemter depreum, 

 ad terminuiii arcuatim elevato ; wargiue ventrali valde 

 cmivexo ; latere ant'ico siiperne leviter excavato ; inii- 

 boiiib/is subelevatis. 

 E CHAMBERED Galatea. Shell ovato-subtrigoiial, 

 subcouipressed, ponderous, regular, smooth, with the 

 epidermis very obscurely rayed, pale pui-ple within on 

 the cardinal margin, sometimes rose-eoloured on the 

 lateral and ventral margins, anteriorly beneath the 

 teeth formed into a chamber by an oblique septiforui 

 lamina ; teeth thick, the central one in the right valve 

 large, divided, and divergent ; posterior side obtusely 

 angular, slightly depressed before the angle, raised in 

 a curve at the end ; ventral margin very convex ; an- 

 terior side slightly excavated above ; umboes not 

 much elevated. 



Duval, Eevue Zoologique, 1S40, p. 211. 

 Ilab. Iliver.s in Guinea. 



Besides the concameration in the interior, this species 

 diii'ers from Galatea radiata in several respects. It is 

 less trigonal, more oval, more flat, and has the ventral 

 margin more rounded. The sides are more excavated, 

 and the central tooth in the right valve is bifid. 



Species 3. (Mus. ? copied.) 



Ualatea tenuicula. Oal. testa tenid, ohlovgo-subtri- 

 goiid, Uevigatd ; hiaryine cardinali angusto ; dentibua 

 parvis, siiiiplicibiia ; latere postico breviuseulo, obtuse 

 atigidalo ; luargine ventrali pa ido convexd ; mubotdbns 

 talis, piirpureis ; latere anlico superni declivi. 



The small thin Gal*tea. Shell thin, oblong, subtri- 

 gonal, smooth ; hinge-margin narrow ; teeth small, 

 simple; posterior side rather short, obtusely angu- 

 lar ; ventral margin a little convex ; umboes wide, 

 purple ; anterior side sloped above. 



Philippi, Zeitschr. fur Mai. p. 191. 



Hab. ? 



I Differing much in form from Galatea Cuiiluudi. 



.■ptember, 1S6S. 



