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



440. Marginella regularis. 



M. testa M. Jewettii simili, sed multo minore, paullum angustiore ; 

 tenui, nitidissima, crvstallina, omnino diaphana ; labio magis cal- 

 loso. Long. -13, long. spir. -01, lat. -09, div. 120°. 



Hab. Sta. Barbara (Jewett) ; coast of California south from 

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

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



453. Amycla tuberosa. 



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

 tumidis, rapide augentibus ; apice minimo, margines spirae rectos 

 parum superante, interdum subdecliviter sito ; testa adulta inter- 

 dum unicolore, livida sen aurantiaca ; plerumque albida, rufo-fusco 

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

 antibus seu flexuosis, seu varie penicillata, ssepe fascia tessellata 

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

 subangulata ; apertura pyriformi, canali satis prolongate, arcuato ; 

 labro intus acuto, deorsum quasi tumidiore, postice sinuato, intus 

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

 torta, axi antice striato ; superficie lsevi, seu interdum minutissime 

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

 phana, spiraliter sub lente minutissime striolata : operculo Nassse- 

 fbrmi, parvo, marginibus irregulariter serratis, cicatrice bilobata. 

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



Hab. Sta. Barbara, recent and fossil {Jewett) ; coast of Cali- 

 fornia north to Monterey ; Catalina 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 recent 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 

 California!! an Alaboid. 



lAnachis jjenicillata. 



1A. 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 radianti- 

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

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

 formi, antice effusa ; labro postice sinuato. Long. '21, long, 

 spir. -13, lat. -08, div. 25°. 



Hab. Sta. Barbara [Jewett) ; 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. 



