P II L A S. 



Species 42. (Fig. «, h. Mus. Rrit.) 



PiiOLAS (;lobos.\. Pho. testa suhovatA, jwsticc gulmt- 

 temiatd, antice glnhosd, i-alris ilicisis ; jwrte posticd 

 concentrice liratd, in medio costd imh-icatA und ; 

 parte anticd etiam liratd^ radiatim costis acute 

 imbricafis ornatd ; valvd dextrd productd siiblin- 

 giKsfornii, dentihiis aaitis recurvis serratd ; iiucleo 

 lamintE tenninalis valvce siiiistrce triangulari, 

 striata, sxibcomplmmto. 



The globose Pholas. Shell subovate, posteriorly sub- 

 attenuated, anteriorly globose, valves divided, 

 posterior part conceutrically ridged, with a single 

 imbricated rib in the middle : anterior part also 

 ridged, ornamented with radiating imbricated 

 ribs; right valve produced, rather tongue-shaped, 

 serrated with acute recurved tueth ; nucleus of the 

 terminal lamina of the left valve triangular striated, 

 llattish. 



Quor. Voy. Astrolabe. 



Triomphalia globosa, Sowerby. 



Jouanettia globosa, NonnuU. 



Hah. Isle of Leyte, Philippines. 



Found in the soft stone at low water. I have not 

 yet ascertained whether the group of Pholades of which 

 this is typical is really entitled to the generic appella- 

 tion of Jouanettia, but my im[)ressiou is that the term 

 " Triomphalia," which 1 applied to it in the Thesaurus, 

 will have to be resumed. 



Species 43. (Fig. a. h. Mus. Brit.) 



Phulas CuMiXGii. I'ko. testa rotundatd, rrassd ; i-alvis 

 postice caiiali divisis, concentrice Hniis elevaiis 

 liratis, antice costis mimitis serratis radiatis ; parte 

 posticd concentrice laminatd ; valvd dextrd postice 

 in linguld triangulai-t margine triplicato productd ; 

 valvd sinistrd postice bi'evissimd, margine termiuali 

 circulari. 



Cumikg's Piiolas. Shell rounded, lliick ; valves divided 

 posteriorly by a canal, concentrically ridged with 

 raised lines ; posterior part concentrically lami- 

 nated ; right valve posteriorly produced into a 

 triangular triple-bordered tongue; left valve 

 posteriorly very short, terminal margin circular. 



Sowerby. Proc. Zool. Soc, 1849. 



Hab. Isle of Zebu, Philippines. 



Found by the late Mr. Cuming in coral rock in low 



water. 



Species 44. (Mus. Brit.) 



PnoLAS PULCUERUIMA. I'iu). testd siiboviiti, veiitncosa, 

 postice globosd, corrugatd, antice siibattenuatd ; 

 valvis transverse divisis ; parte jMsticd costis dis- 

 tanlibus concentrice liratd ; parte anticd lineis 

 liratd, costis inibricatis raxliatd; valvd dextrd pro- 

 ductd, linguceformi, margine dentihus acutis ciispatis 

 serrato ; nucleo laminoe ti:riiiin(di.< ralrce sinistrce 

 subtriangulari, rotundo, lin, /.< < leralis linito. 



The vert beautikcl Piiolas. Shell subovate, ventri- 

 cose, posteriorly globose, corrugated, anteriorly 

 subattenuated, valves transversely divided ; poste- 

 rior part concentrically ridged with distant ribs ; 

 anterior part ridged with lines, rayed with imbri- 

 cated ribs; left valve produced, tongue-shaped, 

 margin serrated with sharp curved teeth ; nucleus 

 of the terminal lamina of the left valve rather 

 triangidar, rounded, ridged with elevated hues. 



SowEP.BY. Proc. Zool. Sue, 1849. 



Hab. West Columbia. 



This magnificent species was taken by the late 



j\lr. Cuming in soft stone at low water. 



Species 45, (Fig. a, b, Mus. Brit.) 



Pholas spatiiulata, P/to. testd elongatd, clausd, 

 ubVuiue divisd ; parte anticd radiatim custatd, sub- 



