40 GENA. 



and lilac, marked with alternate light and dark bands, the light 

 bands sometimes articulated ; spire depressed, outer lip slightly 



The G. nigra of Adams (but surely not nigra Quoy !), is figured 

 on pi. 55, figs. 5, 6, 7, and pi. 2, figs. 11, 12, 13. It is of a dark olive- 

 brown variously banded and maculated with pink or grayish-white, or 

 suffused with pink under the brown, or unicolored olive-brown (pi. 

 2, figs. 8, 9, 10), and this last coloration seems to be G. plumbea of 

 Adams (pi. 55, fig. 4). Some specimens before me have no brown 

 markings, but are very light, with pink spiral, articulated bands ; 

 others are closely painted with green arrow-shaped articulations. In 

 all, the outer lip is a little sinuous. 



G. STRIATULA A. Adams. PL 55, figs. 34, 35. 



Shell haliotis-shaped, ovate-oblong, rather flattened on the back, 

 striated all over, the striae deep and rather wide apart ; red, varied 

 with orange, yellow, and brown ; spire prominent, sometimes rather 

 distorted ; outer lip strongly flexuous. (Ad.} 



Calapan, Mindoro, Philippines, 9 fms. ; Australia. 



G. striatula AD., P. Z. S. 1850, p. 37 ; Thes. Conch, ii, p. 829, t. 

 173, f. 9, 10. 



Has more strongly flexuous outer lip than G. strigosa. 



G. DILECTA Gould. PI. 55, fig. 33. 



Shell small, thin, lengthened oval, shining, yellowish-green, orna- 

 mented with white triangular spots with dark apices, sometimes in 

 series ; decussated by incremental and deeper spiral strise ; whorls 3, 

 apex nearly terminal ; aperture narrow, oval, the ventral face nearly 

 level ; inside shining, greenish. Very delicate and slender, allied 

 to G. planulata, a much larger species, and G. strigosa, of which it 

 may possibly be the young. Length 8, breadth 4 mill. ( Gld.~) 



Hakodadi Bay, Japan. 



G. dilecta GOULD, Proc. Bost. Soc. N. H. vii, p. 44, 1859. 

 SOWERBY in Conch. Icon., f. 14. 



Subgenus PLOCAMOTIS Fischer. 



Plocamotis FISCHER, Manuel de Conchyliologie, p. 840, 1885. 

 Type, G. Icevis Pse. 



