279 



quam superior. Apices prominuli, involuli. Area et praesertim lunula distinclae, 

 angulo cinctae, transversim planae, coslis simplicibus subnodulosis aeque alque auri- 

 culae sculptae. Reliquae coslae valde peculiares. Carinae earum lineares, subser- 

 ralae; interstitia sub lenfe eleganlissime (ransversim slriata. Color albus, slrigis ra- 

 ris, angulalis, rufis, in valva superiore majoribus pictus ; area et lunula rufo marmo- 

 ratae, sublessellatae. Pagina interna alba versus ambilum rulescens. Cardo dentibus 

 validis instrucfus, duobus divergentibus in utraque valva, cardinem Spondylorum in 

 me/ilem vocans. — Phil. 

 Hab. — ? 



3. Pecten araiculum Philippi. 



P. testa subaequivalvi, subaequilatera, radiatim costata et profunde striata, versus 

 apices planata, albo et purpureo varia; costis 9 — 10; auriculis obliquis subaequalibus; car- 

 dine dentato; pagina interna valide costata, circa circum ferrugineo fusca. — Phil. 



Alt. lö 1 ^'", long, totidem vel minor, crass. 4 2 / 3 — 8'". 



Pecten amiculum Philippi Zeitschr. für Malacozoologie VIII. 1851 p. 89. 



Species quam maxime affinis P. plicae, testa versus apices compressa, denies 

 cardinis, zona fusca ante marginem paginae internae, slriae profundae radiantes etc. 

 idem, sed numerus coslarum duplex. Valva dexlra seu superior minus convexa, 

 purpurea albo maculata, valva inferior magis convexa, alba punctis maculisve mino- 

 ribus purpureis adspersa. Valvae tarn arcle claudunlur, ut byssum nullum ab animale 

 emitti censeam, neque ullum ciliarum vesligium in sinu pro bysso destinalo video. 

 — Phil. 



Hab. Madagascar. 



4. Pecten fuscus Linsley. 



Shell amall, thin, somewhat elongated, slightly convcx, with about 24 thread-like 

 radiating ribs; the whole aurface, viewed with a magnifier, is found to be sculptured 

 with microscopic lines, which ourve from the centre towards the sides without rcference 

 to the ribs; the posterior one slightly emarginate. Colour, a dusky red. — Gould. 



Long. 10 Mm. 



