384 MAZATLAN UNIVALVES 



SUBOEDEE TOXIFEEA. 



FAMILY TEEEBEID^E. 



GENUS TEEEBEA, Adanson. 



Terebra, Adans. pars. Eyes at the outer bases of the tentacles, 



SUBQENUS MYUEELLA, Hinds. 



H. fy A. Ad. Gen. vol. i. p. 227. Whirls with a tuberculated 

 zone. 



! 450. MYUEELLA ALBOCINCTA, n. s. 



M. t. conico-subulatd, acuminatd, turritd ; fusco-purpured 

 seu olivaced ; anfr. planulatis, superne cingulo tuber culato, 

 albo, interrupte fusco picto ; infra costis transversis, tuberculis 

 haud semper convenientibus, hand extantibus, obtusis ; lineis im- 

 pressis spiralibus, plerumque iv. vi., interdum costis decussan- 

 tibus ; superjicie totd spiraliter exillime striatd, striis undulatis, 

 irregularibus ; anfr. ultimo cingulo albido suturce antecedente ; 

 aperturd obovali, labro acuto, vix sinuato, labio tenuissimo ; 

 canali brevi, contortd, alte emarginatd ; carind acutd spiraliter 

 ascendente, columellam vix plicante : operc. parvo, diaphano, 

 aureo, rhombico, diagonaliter depresso, apice acuto, marginibus 

 rectis, termino convexo. 

 = Terebra armillata, Wee. in Zeit.f. Mai. 1851, p. 34, no. 118, 



(non Hinds.) 

 Comp. T. variegata, Mice. loc. cit. no. 117, (Pnon Gray.) 



Following as I thought the judgment of Dr. Menke, I have 

 freely distributed this shell as T. variegata. According to the 

 types however, that species is distinct ; it is not uncommon on 

 the coast, but was entirely absent from the Mazatlan collection. 

 The shell so named in Dr. Menke's mixed list may be the true 

 T. variegata, imported, or one of the species now described. 

 The present species is so closely related to T. armillata, Hinds, 

 (teste types in Mus, Cum.) that there can scarcely be a doubt 

 that it is the shell brought by Melchers. It even more closely 

 resembles the Gambia species, T. inter tincta, Hinds;* from 



* ? Should not T. Africana, G-ray, in Griff. Cuv. pi. 23, f. 5, be referred to this 

 species rather than to T. variegata. The shell figured by Kien. Icon. Conch. 

 p. 114, no, 10, pi. 2, f. 3, seems exactly to represent the T. variegata of the Gulf 

 of California; which differs from T. albocincta in being much larger, broader, 

 not olivaceous, with sutural band broader and flatter in proportion, with the 

 radiating costie in the lower whirls nearly obsolete, and the base more rounded. 



