153 



DELPHINULA, Lamarck. 



(Plates I., II. Tlies. 477, 478.) 



Testa turbinata, subdiscoidea, varie sculpta, late per- 

 forata, intus nacrea ; anfractibus paucis, rapide crescenti- 

 bus, plerumque angulatis rugosis ; apertura rotunda, Integra, 

 magna. Operculum corneum multispirale. 



The Delphinulge are a kind of Turbones in form, but 

 belong rather to the Trochi in having a multispiral horny 

 operculum. The group to which such species as D. Peo^onii, 

 clathratus, &c., belong is separated below, as the shells are 

 not pearly within. 



Species. 



1. LACINIATA, f. 1, 6, LaTnarclc. — Crassa, rugosa ; ultimo 

 anfractu maximo, liris moniliferis numerosis purpureis et 

 costellis rugosis subdistanter appendicibus nodosis, et rude 

 ramosis armata ; spira depressa, supra angulum planata ; 

 umbilico intus rugoso maximo, apertura infra snbacu- 

 minata leviter sulcata. — At the angle is a row of large, 

 thick, rudely-branched projections, which are generally raised, 

 and then bent downwards above the whorl and divided into 

 two, or sometimes three lobes. The second row has smaller 

 and straighter projections ; those of the third are larger, and 

 those beneath, when present, are of various sizes. The var. 

 f. 1 is irregular in having the projections at the angle 

 straight, excepting on the penultimate, in which they are 

 slightly bent over. 



2. iNCiSA, f. 9, Reeve, — Quam D. laciniata magis globosa, 

 liris moniliferis densis nigrescentibus ; angulo anfractuum 

 subrotundo. — More globose, smooth and rounded than sp. 1. 

 The beading on the close-set blackish threads between the 



