1876.] Biology of the ' Valorous' Cruise, 1875. 



201 



the coasts o£ Spain and Portugal, 718-795 £ms. ' Challenger' Expe- 

 dition, Station 56, S.W. o£ Bermudas, 1075 fms. Gulf o£ Mexico, 

 325 £ms. (Pourtales). Fossil at Trapani in Sicily (Seguenza). 

 Pro£. Seguenza referred this species to the genus Trochocochlea o£ 

 Klein ; but the type o£ that subgenus o£ Trochus is Trochus lineatus 

 of Da Costa, which has no relation to the present genus. 

 The accompanying figures of a perfect specimen from the ' Valorous ' 



dredgings will serve to show the beauty of this species and the peculiarity 



of the genus. 



Seguenzia formosa, Jeffr. 



2. S. elegans, sp. n. Base perforated or umbilicated. Pore. Exp. 



1870, oft the coast of Portugal, 740-1095 fms. 



3. S. carinata, sp. n. Base widely and deeply umbilicated. ' Valorous ' 



Exp., North Atlantic, 690 fms.; Pore. Exp. 1870, Bay of Biscay, 

 off the coasts of Spain and Portugal, 718-1095 fms. ' Challenger ' 

 Expedition, west of Eayal, Azores, 1000 fms. 



Note on the Odontophore of Buccinum Gi^cenlandicum. 

 By Jabez Hogg, F.L.S. 



The odontophore of B, Groenlandicum differs from that of B. undatuyn 

 both in the lateral and central teeth. In B. Groenlandicum the lateral 

 portion of the ribbon contains about sixty rows of bold translucent 

 teeth, arranged in series of three set on the same shaft ; the superior 

 of which is recurved and much prolonged, while the central one is small 

 and subdued, and the third or last is of medium size and slightly 

 recurved. The median (rachidian) portion of the ribbon bears upon its 

 more central part a series of symmetrically arranged rows of four teeth, 

 all of which are of the same length, short and more suppressed than 

 the smaller of the laterals, but far more developed than those of B. 

 undatum. 



I have noticed, in my former examinations of the odontophores of 

 Buccina, that in the early condition (embryonic state) there are three 



