192 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.2 



Panama. L. G. Hertlein collector. Six additional specimens were 

 dredged at the same locality, and 7 specimens at Loc. 27,229 (C.A.S.), 

 in Bahia Honda, Panama. 



The two distinct folds on the columella are sufficient to separate this 

 form from all other west coast species in the genus. It is the first Recent 

 species in the subgenus Cylichnella as defined by Dall,-^ to be described 

 from the west coast of the Americas. 



This species is named for Taboga Island, in Panama Bay, the type 

 locality of this species. 



Terebra (Strioterebra) montijoensis Pilsbry & Lowe 



Terebra (Strioterebra) montijoensis Pilsbry & Lowe, Proc. Acad. Nat. 



Sci. Philadelphia, vol. 84, 1932, p. 42, pi. 1, fig. 1. "Montijo 



Bay." 

 Two adult and 7 young specimens were dredged at Loc. 27,229 

 (C.A.S.) in Bahia Honda, Panama. These differ slightly from the 

 type in having 12 axial ribs and finer spiral sculpture but are otherwise 

 very similar. 



Mitrella harfordi Strong & Hertlein 

 Plate 18, Fig. 6 



Mitrella harfordi Strong & Hertlein, Proc. Calif. Acad. Sci., ser. 4, 

 vol. 22, no. 6, December 31, 1937, p. 167, pi. 35, fig. 15. "Lat. 

 16°38'N., Long. 99°27'30"W., to Lat. 16°39'N., Long. 99° 

 24'30"W., dredged in 20 to 45 fathoms, about 33 miles east- 

 ward of Acapulco, Guerrero, Mexico, and 32 miles west of 

 Dulce Bay." 

 Hypotype: No. 733 (Calif. Acad. Sci. Paleo. Type Coll.), from 

 Loc. 27,228 ( C.A.S. ), dredged in from 3 to 9 fms., o£f Taboga Island, 

 Panama. L. G. Hertlein collector. Thirteen additional specimens were 

 dredged at the same locality. 



Some of the specimens show the outer lip strongly dentate and the 

 columella with a raised edge which is less strongly grooved. One speci- 

 men in particular shows a strongly developed varix on the back of the 

 body whorl. Most of them are bleached a dull white. The indications 



23Dall, W. H., Bull. Mus. Comp. Zool., vol. 43, no. 6, 1908, p. 242. 

 "Cylichnella Gabb, s.s., type C. bidentata Orb. Pillar with two distinct plaits." 



