REPORT ON THE LAMELLIBRANCHIATA. 79 



I have been unable to discover any description by Dunker of Solen philippianus, 

 no mention of it being made in the Proc. Zooh Soc. Lond. for 1861 as stated by 

 Sowerbv. 



SolecuTtu-'i, Blainville. 



Solecurtus (^20?') coarctatus (Gmelin). 



Solen roarctatus, Gmelin, Syst. Nat., p. 3227. 



Solen angusfior, &c., Cliemiutz, Concli.-Cab., vol. -vi. p. 62, pi. vi. fig. 4.5. 



Solecurtus ahbreviatus, Gould, Proc. Bost. Soc. Nat. Hist., 1861, vol. viii. p. 26; Otia, p. 164. 



Solecurtus abbreviatus, Sowerby, Concli. Icon., voL xix. figs. 6a-b. 



Macha abbreviatus, Conrad, Amer. Journ. Conch., vol. iii., Appendix, p. 23. 



Macha schcejmiakeri, Dunker, Zeitscli. f. Mai., 1852, p. 56. 



Azor (Macha) scheepmaJieri, Dimker, Novitat. Conch., p. 121, pi. xxxix. figs. 10, 11. 



Solecurtus scheepmalteri, Sowerby, loc. cit., pi. iii. fig. 14. 



Azor oblongiis, Dunker, Proc. Zool. Soc. Lond., 18G1, p. 425. 



Solecurtus oblongus (Dohrn), Sowerby, loc. cit., fig. 2. 



Azor solidus, Dunker, Proc. Zool. Soc. Lond., 1861, p. 425. 



Solecuiius solidus (non Gray), Sowerby, loc. cit., fig. 3. 



Habitat. — Station 188, south of New C4uinea, in 28 fathoms; mud. 



This species may be known l^y the de^aressed ray, which descends obHc[uely across 

 the middle of the valves. In this respect it differs from the European Solecurtus anti- 

 quatus, and it is also more inequilateral. Chemnitz, in his description, remarks upon 

 this depression, and it is strongly depicted in his figure. On this account, and also for 

 the reason that his specimen came from the Nicobar Islands, I am inclined to agree with 

 Jeffreys in considering this distinct from the British Solecurtus antiquatus. All the forms 

 above mentioned agree in having the radiating groove, a similar epidermis, &c., and 

 differ only slightly in form. Solecurtus ahbreviatus was described from Chinese examples, 

 Solecurtus solulus, Solecurtus ■■icheepmakeri, and Solecurtus oblongus being quoted as 

 Philippine forms. Sowerby (Conch. Icon., fig. 3) represents the type shell described 

 by Dunker as Azor solidus, but refers the species to the Solen solidus of Gray. If Mr. 

 Sowerby had read the description in the Spicilegia Zoologica, p. 7, pi. iii. fig. 12, he 

 could not have made such an unpardonable mistake. Gray's shell has been figured by 

 Reeve in his monograph of the genus Psammohia, pi. iii. fig. 18, as a manuscript species, 

 he not being aware of its description having been published many years previously : 

 and it is a curious coincidence that this same species w-as subsequently described and 

 figured by Philippi as a Psammohia (Abbild., vol. i. pt. 4, p. 1, pi. i. fig. 1) under the 

 siime specific name (solida) employed originally by Gray. 



