78 



More regular, more oval and more ventricose than P. varius, 

 with the anterior auricles smaller in proportion, and 40 muri- 

 cated ribs instead of 25 or 30. It is a white British shell, 

 the coloured variety (fig. 223) is more like P. varius, but has 

 the same number of ribs as this species. Great Britain. 



101. P. PsEUDOLiMA. (pi. XX. f. 235.) uob. 



T. rotundato-ovali, sub-obliqua, sub-sequivalvi, ventricosa : 

 auriculis insequalibus, squamoso-sulcatis ; anticis elongatis, 

 acutis, valvse dextrse, ad marginem spinosis ; posticis parvis 

 obtusis; costis 27, crassiusculis, bi-sulcatis, sub-rotundatis, 

 series tres squamarum, acutarum ferentibus : interstitiis 

 angustis, planis : colore aurantiaco, albo (precipue ad 

 umbones) variegato. Long. 1. 15.; lat. 0. 50.; alt. 1. 20.; 

 poU. 



The ribs in this species are beautifully ornamented by three 

 rows of close, sharp, erect, slightly curved scales. Brought 

 by Mr. Cuming from Jacna, Bohol, Philippines. 



DOUBTFUL SPECIES, NOT MENTIONED ABOVE. 



Linnaeus. Ostr. striatula, minutse, pellucens, flavicans. 



Gmelin. Ostr. elegans, rosea, tenuis (Gault. t. I7.f. 3.) cre- 

 nata, (Lister, t. 170. f. 7-) pusilla (Gault. t. 74. 1. a. a.) 

 triradiata (MuUer. Zool. Dan. 2. t. 160. f. 12.— P. dandi- 

 cus ? Chemn.) Fuci (Miill. Zool. Dan. 2. t. 60. f. 3. to 

 5.) septemradiata, arata, crenulata (Radula?) innominata, 

 subrufa, valentina, (Valent. Abb. t. 13. f. 2.) seminuda 

 (Knorr. Vergn. 6. t. 19. f. 4.). 



Chemnitz. Pect. vitreuiTi. Conch, t. 67. f. 638. 1. A. B. C. 

 (The two latter are quite distinct.) aculeatus (Jeffreys). 



Born. Ostr. elongata, t. 6. f. 2. perhaps a small joes /e/i*. 



Poli. Ostr. nebulosa, t. 2. f. 12. multistriata, t. 28. f. 14. 



Pennant. Ostr. leevis, pi. 64. f. 3. 



Gray. Pect. vitreus. App. Parry's Voyage (hyalinus?). 



Lamarck. Pect. lineolaris, Anim. sans Vert. p. 166. Dela- 

 sueur. pi. 15. f. 3. a. b. flabellatus, p. 172. dispar., p. 173. 

 (obsoletus?) quadriradiatus, p. 173. hexactes, p. 1/8. 



Conrad. Pect. obliquatus. 



Philippi. Ostr. testae. 



Payradeau. Pect. Dumasii, (inflexus, clavata, Poli.) 



