MUSEUM OF COMPARATIVE ZOOLOGY. 173 



The very young, owing to its sculpture, might be taken for an immature 

 Mitra, but the shell when older is very characteristic. It is the first living 

 species of the subgenus which has been reported. 



Genus MAZZALINA Conrad. 



This group is known only from a single Eocene species, M. pyrula Conrad, 

 which I agree with Messrs. Fischer and Tryon in regarding as nearly related to 

 Lagena, having recently examined the original type. Another shell, which 

 has recently been referred to this group, is of a good deal of interest, and 

 represents without dcubt a new generic type. 



Genus LIOCHLAMYS Dall. 



Shell resembling a Fasciolaria of the type of F. distans, but short and glo- 

 bose, with a short curved canal, three plaits on the column, and the usual 

 features of Fasciolaria, but entirely covered over in the adult with a coat of 

 enamel which obscures the sutures, and as it were varnishes the whole shell. 

 The mantle in this form must have been prolonged, as in Dipsaccus or Cyprcea, 

 so as entirely to hide the shell. 



Type, L. bulbosa Dall = Mazzalina bulbosa Heilprin, Trans. Wagner Free 

 Inst., I. p. 76, plate ii. fig. 7, 1887. Pliocene of the Caloosahatchie beds, 

 Florida. 



The original specimen of Prof. Heilprin was somewhat decorticated, and the 

 usual spiral sculpture of the canal and anterior part of the shell running into 

 the aperture, where the enamel had been lost, gave somewhat the aspect of the 

 grooving of Lagena or Mazzalina. In perfect specimens nothing of this sort 

 is to be seen. The shell is a short bulbous Fasciolaria, covered with a coat of 

 enamel brilliantly polished. This species is found with many other rather 

 deep-water species, of which several are in the Albatross dredgings. It would 

 not be very extraordinary if future dredgings in the Gulf of Mexico should 

 bring it to light in the recent state. 



Genus LATIRUS Montfort. 



The following species, though not obtained by the Blake, form part of the 

 fauna of this region. Leiicozonia cingulifera Lamarck (sometimes 70.0 mm. in 

 length) which extends from the Florida Keys to the Isthmus of Darien. By 

 a typographical error transplanted into Mr. Tryon's Manual (Vol. III. p. 96), it 

 was referred to as L. cingulata by Mr. W. W. Calkins. The latter is a West 

 American species, of which no trace has ever been found in Florida. L. occllata 

 Gmelin also reaches the Keys, though rare ; L. dubia Petit is a variety of it 

 L. triscrialis, to which Tryon refers L. dubia, is confined to the eastern Atlantic. 

 L. multangulus of Tryon (after Philippi), as we have elsewhere shown, is a 



