82 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 16 



1390-41 (3), 1393-41 (4), 1429-41 (3), 1659-48 (5). Cat. nos. 42.1- 

 42.11. 



Distribution: The Channel Islands and adjacent banks. Bathy- 

 metric range, 43-138 fms. 



Garyophyllia diomedeae von Marenzeller 

 Plate 9, fig. 43 



CaryophylUa diomedeae von Marenzeller (1904), Bull. Mus. Comp. 

 Zool., vol. 43, no. 2, pp. 79-80, pi. 1, fig. 2. 



The hypotype is a small specimen not over 8 mm in height w^hich is 

 identical with von Marenzeller's description and figure. 



Von Marenzeller recorded this species from off Panama in 1043 m. 



Hypotype: Cat. no. 43.2 (Sta. 948-39). 



Material examined: Stas. 170-34 (2 worn specimens), 948-39 (1). 

 Cat. nos. 43.1-43.2. 



Distribution: Stephens Bay, Chatham Island; off Medidor Island, 

 Bahia Honda, Panama. Bathymetric range, 30-35 fms. 



Genus GERATOTROGHUS Milne Edwards and Haime 



Ceratotrochus Milne Edwards and Haime (1848), Ann. Sci. Nat., ser. 

 3, vol. 9, p. 248. 

 Genotype: Turbinolia multiserialis M.lche\otti. 



Geratotrochus franciscana Durham and Barnard, new species 



Plate 9, figs. 44a, b 



Corallum large, trochoid, narrowing to a wide, flaring base; calice 

 oval, fossa moderately deep (9 mm) ; septa in 5 cycles, interspaces 1.5 

 times the thickness of the primary septa; primary and secondary septa 

 equally exsert (2.2 mm), later septa successively less exsert; septa 

 sharply rounded from costae, descending sharply into fossa; inner edges 

 of septa nearly vertical, straight; inner edges of first and second cycle 

 septa smooth, inner edges of third and fourth cycle septa with paliform 

 processes fusing to form columella at depth ; fourth cycle septa occasion- 

 ally meeting in front of third cycle septa ; fifth cycle septa coarsely and 

 broadly serrate; septal faces with low, fairly numerous, rounded gran- 

 ules; costae granulated, elevated at top of corallum but soon disappearing 

 towards base into low, broad cords with narrow interspaces; costae of 

 first 4 cycles subequal, costae of fifth cycle about half as prominent as 

 other costae; costal interspaces at top of corallum flat-bottomed, becom- 



