88 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 16 



fall as intermediates between types B and C. They differ from type B 

 by the taller corallum and larger columella and from type C by having 

 only 4 cycles of septa and the star-like appearance of the calice. 



The specimens from Sta. 1048-40 lack the star-like septal pattern, 

 have deeper calices, and possess faint, equal costae. 



Hypotypes: Cat. no. 49.2 (L.A.C.M. A375). 



Material examined: Sta. 1048-40 (8). L.A.C.M. A375 (12). 

 Cat. nos. 49.1-49.2. 



Distribution: Peurto Refugio, Angel de la Guardia Island, 11-22 

 fms; L.A. County Museum A375, dredged in Banderas Bay, Mexico, 

 20-40 fms, Feb. 13-14, 1938. 



Genus KIONOTROCHUS Dennant 



Kionotrochus Dennant (1906), Trans. Proc. Rep. Roy. Soc. So. Aus- 

 tralia, vol. 30, pp. 154-155. 

 Genotype : Kionotrochus suteri Dennant. 



Kionotrochus (?) avis Durham and Barnard, new species 

 Plate 11, figs. 50a, b; pi. 12, fig. 50c 



Corallum subturbinate to trochoid, moderately small, attached early 

 in life and free in adult stage with point of attachment healed ; calice 

 slightly oval; septa moderately thin, in 4 cycles, interspaces twice as 

 wide as thickness of primary septa ; primary and secondary septa equally 

 exsert (1.2 mm), third and fourth cycle septa successively less exsert; 

 primary and secondary cycle septa reach columella but are not attached 

 to it; third cycle septa extend two-thirds the distance to the columella, 

 fourth cycle septa one-fourth to one-third the distance to the columella; 

 septa well-rounded above, inner edges vertical and crinkled, undulations 

 irregular and somewhat contorted at the vertices ; septal faces with fine, 

 blunt, scattered granules ; costae granulated, prominent and rounded, 

 costal interspaces one-third as wide as costae, V-shaped, extending to 

 base, on some specimens interspaces approximately of same depth all the 

 way to the base ; columella fascicular, consisting of twisted and contorted 

 pieces, one-third as wide as calice. 



Re?narks: This species is referred to the subfamily Turbinoliinae 

 and the genus Kionotrochus because of the trochoid corallum being free 

 in the ephebic stage and because of the costae extending to the base. This 

 species is rather closely related to Kionotrochus (?) hoodensis new species 

 but is distinguished by being unattached and by other means as noted 

 under that species. The columella is considerably more developed than in 

 other members of this genus. 



