220 BULLETIN OF THE 



Coralliophila lactuca Ball. 



Plate XVI. Fie. 6. 



Shell white or grayish, short conic above, widely fasciolated at the anteriorly 

 pointed base. Nucleus small, white, smooth; whorls eight, rather inflated, 

 transverse sculpture of fine lines of growth, and nine or ten thin sharp-edged 

 varices crisped by the spiral sculpture; the surface is generally sbelly like that 

 of Boreotro2)hon, but if the shell be absolutely perfect there is an external finely 

 shagreened thin calcareous layer of an opaque creamy white, which is almost 

 always eroded except in protected spots ; spiral sculpture of six or more strong 

 revolving primary ridges; other secondary ones to an irregular extent are found 

 between the primaries ; the posterior primary spiral forms a sort of shoulder 

 to the whorl; suture undulating with the sculpture, obscure; base subconic, 

 the young with a small, the adult with a large umbilical funnel, bounded by 

 the prominent siphonal fascicle; aperture within white, smooth, rounded and 

 continuous behind, acute in front, the anterior end being more like an angular 

 gutter than a canal; margins irregular, corresponding probably with the asperi- 

 ties of its station on some coral. Max. Ion. of shell, 21.0; of last whorl, 16.3; 

 of aperture, 13.0; max. lat. of shell, 14.6 mm. The figured specimen is young, 

 and measures 11.0 mm. in length. 



Habitat. Station 5, Gulf of Mexico, off the shore of Cuba, in 152-229 fms., 

 coral ooze, bottom temperature 49°. 5 ; off Fernandina, Florida, at U. S. Fish 

 Commission Staticm 2669, in 352 fms., sand, bottom temperature 43°.7 F. 



This species differs by its surface from any of the previously mentioned 

 species, or any others of the genus which I have examined. Its sculpture is 

 more like that of the young Magilus than that of the other species. The fig- 

 ured specimen shows best the fresh sculpture and form of the young; an adult 

 afterward received from the Fish Commission enables me to describe the 

 mature shell. The soft parts were not obtained, but the specimens were per- 

 fectly fresh, and probably lived at the depth from which they were obtained. 



I may add, on the authority of H. Cuming, that Ehizocheilus madrejporarum 

 Sby. is found in the West Indies. 



Super-Family T^NIOGLOSSA. 

 Family TRITONIID^. 



Genus DISTORTRIX Link. 



Distortrix Link, Beschr. Rostock Samml., p. 122, May, 1807. 

 Persona Montfort, Conchyl., II. p. 603, 1810 ; type, P. anus L. 

 Distorta Perry, Conchology, pi. x., and expl. fig. 1, 2, 1811, 



Distorsio Bolten, Cat. Con., p. 133, 1798, j^/o parte; ed. 1819, p. 94. (No descrip- 

 tions or figures.) 



This genus was first eliminated from all the other Linnean Murices by Link. 

 Bolten's Distorsio was a pure catalogue name, and the species cited under it 



