Bulletin 36 350 



Smithsonian Institution. — P. P. C, Montreal, Feb. 22, 1866." 



The "college in New York State" was Cornell University' 

 where the collection has remained since its purchase, referred to 

 in Carpenter's note. The finding of the two types offers occas- 

 ion for their illustration inasmuch as the}^ have not heretofore 

 been figured. The species described as new were : 



1. T^irritella Jewettii, 



2. Bittium armillatum — the type is stated by Bartsch to be 

 in the U. S. N. M., Cat. No. 15653 and is figured by him in 

 Proc. U. S. N. Mus., vol. 40, 191 1, pi. 52, fig. 6. 



3. Opalia {? crenatoides , var.) insculpta — t5''pe C. U. M. Cat. 

 No. 4950. 



4. Trophoyi tenuisciilptus — type; C. U. M. Cat. No. 4951. 



5. Pisajiia fortis. 



Dentiscala insculpta (Carpenter) 1866. PI. i. Figs. 10, II. 



opalia {f crenatoides var.) insculpta Carpenter, Rep. Brit. 

 Asso. Ad. Sci. for 1863, 1864, p. 660 ; Ann. Mag. Nat. Hist. 

 1866, 3rd ser., vol. XVII, p. 277. Reprint, Smith Misc. Coll. 

 1872, 252, p. 324. 



Dentiscala insculpta Dall, Proc. U. S. Nat. Mus. 1917, vol. 



53. P- 473- 



Remarks i86j. "Like the C. S. L. form and crenata, but 

 ribs closer, without spiral sculpture, sutural holes behind the basal 

 rib." 



Original descriptio7i. — "O. testa O. cre?iatoidei sivaili ; sed 

 costis radiantibus pluribus, xiii, — xvi., in spira validis ; anfr. 

 ult. obsoletis ; sculptura spirali nulla ; punctissuturalibus minus 

 impressis, circa fasciam basalem Isevem postice, non antice con- 

 tinuis. 



Had. Sta. Barbara, Pleistocene, i sp. {/ewett). 



Very closely related to O. crenatoides, now living at Cape St. 

 Lucas, and, with it, to the Portuguese O. crenata. It is quite 

 possible that the three forms had a common origin." 



The exterior of the shell of this type has been worn away 

 except in the sutural region, hence the exact character of the 

 longitudinal ribs cannot be described, however prominent impres- 

 sions of each reveal fourteen ribs on the whorls. 



