CLASS GASTROPODA 
13 
somewhat constricted, with a short grooved spine on each varix where it 
crosses the concavity; aperture ovate, small, with the inner lip smooth, 
the outer one more or less denticulate on the edge, the enamel whitish; 
canal long anteriorly attenuated, the margins adjacent but not adherent. 
Height of adult, 45.0; max. diam., 28.0; min. diam., 10.5 mm. (Dali.) 
Types in United States National Museum, Nos. 130628 and 133945. 
Type locality, off Santa Rosa Island, California, in 82 fathoms. 
Range. Santa Barbara Islands, California, to Cerros Island, Lower 
California. 
Murex gemma Sowerby, 1879 
Thesaurus Conchyliorum, Murex, 32; PI. 22, fig. 214. 
Testa pyriformis laevis solida alba, superne nigro bifasciata, infra 
super liras nigro lineatis; vericibus quinis crassis, spiraliter prominente 
liratis, ad angulum tuberculatis, ad medium anfractus precedents superne 
elevatis, spira conica, anfractibus ad suturam inter varices profundissime 
cavernosis, infra medium excavatis; apertura ovata, margine tenui canali 
breviusculo, clauso, superne lato.—This exquisite shell, although closely 
connected with the group by the deep excavation of the whorls between 
the varices at the suture, and by general form, has no fronds, but raised 
ridges across the thick varices, which are painted with reddish black. 
( Sowerby.) 
Length, 1.25 to 1.5 in. (Tryon, Manual of Conchology .) 
Type in British Museum? Type locality ? 
Range. Santa Barbara, California, to Cerros Island, Lower California. 
Murex festivus Hinds, 1843 
Zoology of the Voyage of H.MS. Sulphur, Molluscae, 9; PI. 3, figs. 13, 14. 
Testa fusiformi, crassa, fulva, trivericosa; varicibus simplicibus, re- 
curvis, superne cristatis, subtilissime creniferis; interstitiis nodulosis, lineis 
subgeminis transversis fuscis eleganter ornatis; apertura ovali; labro intus 
sparsim denticulato; canali valde clauso, ad basin subrecurvo. (Hinds.) 
Whitish, closely encircled by incised lines, which are brown, varices 
reflexed, widely laminar, crossed by close rows of elegant semicircular 
scales. Length, 1.5-2.5 in. (Tryon, Manual of Conchology.) 
Not known where the type is. Type locality, Magdalena Bay, Lower 
California. 
Range. Santa Barbara, California, to Cerros Island, Lower California. 
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