80 MUREX. 



individual specimens of several of the following forms (and have 

 in these cases caused them to be described as new species), with- 

 out being at all characteristic. 



Locality unknown. 

 M. CABRITII, Bernardi. PL 11, fig. 123. 



The short, thick-set spines, extending over the canal, remind 

 one of M. plicatus, Sowb., with which it also has other relation- 

 ships. Only a single specimen is known, without locality. 



Length, 2'5 inches. 



M. PLICATUS, Sowb. PI. 40, fig. 508. 



This species is well distinguished from others of the group ; it 

 is thick and heavy, the spines are obtuse, short on the whorls and 

 long on the canal. The color is purplish white, darker within the 

 aperture. Length, 3 inches. 



W. Coast of Central Am. to Gulf of California. 



Two specimens in the Mus. Philad. Acad. have thread-like 

 brown bands like M. concinnus, Reeve. 



M. BEAUI, Petit. PL 11, fig. 1 1 (',. 



Described from a single specimen which, except in its much 

 greater size, much resembles varieties of M. recurwroatri& The 

 shell is not in good condition, and presents no satisfactory spe- 

 cific characters. Length, 5 inches. 



Isle of Marie-Galante, W. 1. 

 M. EXIMIUS, Brazier. 



Whorls seven, with two short, blunt spines on each varix of the 

 body and no spines elsewhere ; spaces between the varices longi- 

 tudinally five-ribbed, crossed by alternately larger and smaller 

 striae. Cream color, violet-tinged in the aperture. 



Length, nearly 2 inches. Not figured. 



Darnley Isl. Torres Sts. jV. Australia; 30 fms. sandy bottom. 



M. RECURVIROSTRIS, Brod. PL 11, fig. 193 ; PL 10, fig. 112 , PL 



12, figs. 124-128. 



This is a comparatively small species, rarely exceeding two 

 inches in length. The varices are thick, plait-like and tubercu- 

 lated by the crossing of elevated lines which also cut the three 

 inter-variceal ribs into tubercles. These tubercles are sometimes 

 developed into short spines, one on the upper part of each varix, 



