356 JOURNAL OF CONCHOLOGY, VOT,. I4, NO. 12, OCTOBER, I9T5. 



Group M. 



62. — .9. a/nericanns Hermann, der Naturforscher, xvi., 1781, p. 51. 



Conch. Cab., vii., pi. 45, fig. 465. Illust. Conchyl., pis. 3, 



4, and 5. Thes. Conch., figs. 42, 64, and 65. Conch. 



Icon., pi. 4, fig. 17. Conch. Cab. (2nd edit.), vol. vii., fig. 



465- 



{j=^echinat!is Martyn. Univ. Conch., ii., 1784, fig. 154). 



(^z=ame?-ica nus Lk. Anim. Sans Vert. vol. vi., p. 1S8). 



{=arachnoides Lk. Anim. Sans Vert., vol. vi., p. 188). 



{^^=lon°;ispina Lk. Anim. Sans Vert., vol. vi., p. 189). 



{^^avicularis Lk. Anim. Sans Vert., vol. vi., p. 189). 



Hab. : American seas (Chenu) ; Bermudas (Reeve); Porto Rico 



(Dall and Simpson). 



An extremely variable species, both in colour and in the disposition 



of its spines, well illustrated by the fine series of figures given by Chenu 



in his Illustrations Conchyliologiques. 



63. — S. crassisquamatiis Lk. Anim. Sans Vert., vi., 18 19, p, 191. 

 Conch. Cab., vii., pi. 69, figs, e, f. Thes. Conch., fig. 28. 

 Conch. Icon., figs. 24 and 29. 



{=:.pnnceps Brod. P.Z.S., 1833, p. 4). 

 {j=^diibius Brod. P.Z.S., 1833, p. 4). 

 (^=leucacantha Brod. P.Z.S., 1833, p. 5). 

 {^pictoriim Sow. Thes. Conch., fig. 45). 

 {=basi/icus Reeve. Conch. Icon., fig. 41). 

 Hab. : Island of Plata, West Columbia (Cuming). 

 This species is extremely variable in colour ; it occurs from pure 

 white to red and purple-brown. The leucacantha Brod. has a colouration 

 of orange and white, the orange generally covering the umbonal 

 region and extending along the spines. It rarely occurs as figured 

 by Reeve with its whole surface orange and white spines. Sowerby's 

 figure o{ pictonim in Thes. Conch., pi. 85, fig. 17, is to me doubtful ; 

 it seems almost too highly coloured for any species of Spondyhis. 

 Lamarck also referred to the fig. i, tab. 28, Rumph. Mus., which 

 may represent crassisquamatiis, but it is difficult to say so with any 

 certainty. 



64. — 6". iinicolor Sow. Proc. Zool. Soc, 1847, p. 86. Thes. Conch., 

 fig. 19. Conch. Icon., fig. 37. 



Hab. ? 



Owing to the difficulty of tracing the whereabouts of Sowerby's 

 type, I am unable satisfactorily to identify ^his species with any speci- 

 mens I have examined. Reeve's figure does not agree altogether 

 with Sowerby's, which is coloured purple, but according to the descrip- 



