113 



6. Spondyhts iinperialis Chenu. 



1844. Spondyhts Iinperialis Chenu, Illustr. Conchyliol., p. 6, Spondyhis, pi. XXVI, figs. 2, 2a, 



1847. Spondylns iniperialis Sowerby, Thés. Conch., I, p. 424, pi. LXXXVIII, figs. 43, 44. 



1853. Spondylns iinperialis Môrch, Cat. Yoldi, n, p. 60. 



1856. Spondylns iniperialis Reeve, Conch. Icon., IX, 5/i9«(/(^///j' pi. VIII, fig. 28, pi. X VI, fig. 28(5'. 



1856. Spondylns Iniperialis Hanley, Rec. Biv. Shells, p. 291. 



1858. Spondylns iinperialis Kiister, in Martini-Chemn. Conch. -Cab. (N. F.), VII (2), Pectinacea, 



p. 21, pi. IX, fig. I. 

 1860. Spondylns iinperialis Reeve, Elem. Conch., II, p. 54. 

 1862. Spondylns iinperialis Chenu, Man. Conchyliol., II, p. 191, fig. 967. 

 1869. Spondylns iinperialis Dunker, Cat. Mus. Godeffroy, IV, p. 116. 

 1869. Spondylns iinperialis Frauenfeld, Verhandl. Zool.-bot. Ges. Wien, XIX, p. 887. 

 1884. Spondylns iinperialis Grasset, Ind. Test. Viv., p. 306. 

 1890. Spondylns iniperialis Paetel, Cat. Conch. Samm., III, p. 239. 



1903. Spondylns iinperialis Smith, Faun. Geogr. Maldive, Laccadive Archipel., II, p. 621. 



1904. Spondylns iinperialis Smith, Ann. Mag. Nat. Hist., (7) XIV, p. 13. 



1906. Spondylns iinperialis Standen & Leicester, Ceylon Pearl Oyster Rept., V, p. 288. 



1914. Spondylns iinperialis Fulton, Journ. Conch., XIV, p. 335. 



This beautiful species is distinguished by having six radiating ribs widi strong, long and 

 pointed spines, and in the interspaces 2 — 3 rows of short spined ridges. The "Siboga" examples 

 are ail young spécimens, not exceeding 50 mm. in height. 



Distribution : — 5. iinperialis appears to be mainly confined to the Indian Océan though 

 spécimens hâve been recorded from China. 



The "Siboga" Expédition collected a few young examples from the mid-channel in Solor 

 Strait, off Kampong Menanga (St. 305) and in a travvl at St. 318 (6°36^5S., ii4°55^5E., 

 88 mètres). 



7. Spondyhis micro iepos Lamarck. 



18 19. Spondylns microlepos Lamarck, Anim. sans Vertèb., VI, p. 192. 



1824. Spondyhis microlepos Dubois, Epitome, p. 122. 



1827. Spondyhis microlepos Blainville, Dict. Sci. Nat., L, p. 325. 



1836. Spondylns mycrolepos (sic) Deshayes, in Lamarck, Anim. sans Vertèb., VII, p. 190. 



1845. Spondylns microlepas (sic) Catlow & Reeve, Conch. Nomencl., p. 87. 



1847. Spondylns microlepos Sowerby, Thés. Conch., I, p. 422, pi. LXXXVIII, fig. 46. 



1852. Spondylns mycrolepas (sic) Jay, Cat., (éd. IV), p. 89. 



1856. Spondylns microlepos Reeve, Conch. Icon., IX, Spondylns, pi. XVIII, figs. 65^, b. 



1856. Spondyhis Microlepos Hanley, Rec. Biv. Shells, p. 292. 



1858. Spondylns microlepos Adams, H. & A., Gen. Rec. Moll., II, p. 561. 



1860. Spondylns microlepos Reeve, Elem. Conch., II, p. 54. 



1890. Spondylns microlepas (sic) Paetel, Cat. Conch. Samm., III, p. 240. 



191 1. Spondylns microlepas (sic) Pelseneer, "Siboga" Lamellibranches (Anat.), p. 32. 



191 5. Spondylns microlepos Fulton, Journ. Conch., XIV, p. 336. 



Spondylns microlepos is a small, somewhat deformed species, and has a very reduced 

 type of sculpture consisting of only a few radiating ridges and striae, which are irregularly 

 beaded, and a few short spines or scales near the margins. 



SIBOGA-EXPEDITIE Llllif. 1$ 



