216 BULLETIN OF THE 



still exists in a living state among the Antilles, like many of the other Tertiary- 

 fossils. Both are very similar to the Mediterranean tetrapterus, and I have 

 another species of the same type from the Pliocene Caloosahatchie beds of 

 South Florida. It differs from the Haitian fossil in its more elongated form 

 and narrower varix, and from the Mediterranean species in being much more 

 acute anteriorly and destitute of the linguiform anterior varical expansion 

 found in T. tetrapterus. In my report on the Caloosahatchie Pliocene it is 

 named T. floridanus. 



In the Thesaurus, the younger Sowerby describes this genus as trivaricose, 

 and also in his continuation of the Conchologia Iconica. How inaccurate this 

 is may be observed by any one who will examine a specimen. Whether there 

 are any three-varixed species I do not know, as in the specific diagnoses of 

 the monographs the number is not stated, but in all I have ever seen there 

 were four varices in each whorl. 



Typhis (Trubatsa) longicornis Dall. 



Plate XV. Fig. 7. Plate XXXVIII. Fig. 5. 



Typhis longicornis Dall, Agassiz, Three Cruises of the Blake, II. p. 70, fig. 294, 1888. 



Shell translucent white when young, waxen with areas of pale rosy brown 

 between the varices in the adult ; varices four, ascending the spire nearly in a 

 straight line; tubes tapering, recurved, usually broken off short, but originally 

 long; nucleus subglobular, glassy, followed by seven gradually increasing 

 whorls, obscured by the varices, but somewhat scalar behind; surface with 

 extremely fine spiral striation, stronger lines of growth, and on the tips of 

 the tubes and canals when fresh a glassy polish; varices not fimbriated, with 

 rounded edges, strongly arched forward, subconcave behind; aperture small, 

 subcircular, margin detached from the body, elevated, not sharp; with simple 

 edge and smooth interior; canal long, slender, nearly straight, but bent back as 

 a whole, with three antecedent canals surrounding a sort of umbilical chink. 

 Operculum muricoid. Max. Ion. of shell, 23.0; of last whorl, 19.0; of aper- 

 ture, 4.0; of canal before the aperture, 11.5; max. lat. of aperture, 3.0; of 

 shell, 10.0 mm. 



Habitat. Off Havana, Sigsbee, in 127-400 fins., mud, bottom temperature 

 49°.5 to 55°.5 F. 



This species is allied to T.fistulosus Brocchi, T. arcuatus Hinds, and the 

 related forms above mentioned. It has wider varices than the former, and a 

 proportionally smaller aperture; T. fistulosus appears to be destitute of the fine 

 spiral striation, has a more distorted appearance, and does not reach so large 

 a size. T. longicornis is much more fusiform, attenuated, and has longer tubes 

 and canal than T. arcuatus. By the distribution of the species, the forms 

 belonging to this section of the genus Typhis are found in all the northern 

 oceans, apparently one species each in the Mediterranean, North Atlantic, 

 Antilles, North Pacific, and China Sea. 



