10 Dr. P. P. Carpenter on new Forms of Mollusca 



Monterey, beach to 20 fathoms; Catalina Island, 10-20 fa- 

 thoms, State Coll. no. 398a {Cooper). 



453. Amycla tuberosa. 

 J. testa A. minori simillima, sed vertice nucleoso tuberose ; anfr. iv., 

 tumidis, vapide augentibus ; apice minimo, margiues spirse rectos 

 parum superante, interdum subdecliviter site ; testa adulta inter- 

 dum unicolore, livida seu aurantiaca ; plerunique albida, rufo-fusoo 

 vane picta, seu maculata, seu nebulosa, seu strigata strigis radi- 

 antibus seu flexuosis, seu varie penicillata, sa;pe fascia tesseliala 

 subsuturali ; anfract. norm, v., planatis, suturis distinctis ; basi 

 subangulata ; apertura pyriformi, canali satis prolongate, arcuate ; 

 labro iiifus acuto, deorsum quasi tumidiore, postice sinuate, intus 

 circ. octodentato ; labio parum conspicuo, vix rugulato ; columella 

 torta, axi antice striate ; superficie Isevi, seu interdum minutissime 

 sub lente radiatim striolata ; epidermide cornea, tenui, subdia- 

 pbana, spiraliter sub lente minutissime striolata : opercule Nas^ee- 

 formi, parvo, marginibus irregulariter serratis, cicatrice bilobata. 

 Long. -32, long. spir. -18, lat. -14, div. 30°. 



Hah. Sta. Barbara, recent and fossil [Jewett) ; coast of Cali- 

 fornia north to Monterey ; Cataiina Island, 8-10 fathoms 

 [Cooper). 



As this belongs to a group of closely allied species of Nassoid 

 Columbellse, a minute diagnosis is given. The fossil specimens 

 are larger, and have the remarkable nucleus more perfect, than any 

 of the reci'nt shells yet seen. In appearance it scarcely differs 

 from the small variety of the Mediterranean A. minor, Scac. ; 

 but that (with A. corniculata) has a Chrysodomoid nucleus, the 

 Californian an Alaboid. 



1 Anachis penicillata. 



lA. testa parva, Metuloidea, turrita, albida, rufo-fusco plus minusve 

 penicillata ; anfr. nucleosis ii., tumidis, helicoideis, apice mamil- 

 lato ; norm, vi., tumidis, suturis valde impressis ; costis radiaiiti- 

 bus circ. xii., angustis, expressis ; lirulis spiralibus extantibus, 

 in spira plerumque vi. supra costas transeuntibus ; apertura pyri- 

 formi, antice eifusa ; labro postice sinuate. Long. -21, long, 

 spir. -13, lat. '08, div. 25°- 



Hab. Sta. Barbara {Jewe(t) ; S. Diego, Catalina Island, shore 

 to 10 fathoms {Cooper). 



Neither of the specimens sent is quite mature. The mouth 

 is that of an adolescent Anachis, but the sculpture is Metuloid. 



Siphonalia fuscotincta. 



S. testa minima, turrita, albida, apicem versus fusco tincta ; anfr. 



nucl. ii., compactis, subplanatis, apice mamillato ; norm, iv., con- 



vexis, suturis impressis ; costis radiantibus rotundatis, tumentibus, 



basim versus evanidis, interstitiis undulatis, subcequaiitibus ; lirulis 



288 



