Boone, Crustacea, Cruise of *'Alva," 1931 37 



Notes Leyden Mus., vol. II, p. 184, 1880. — Arehiv. fur Naturges., 



Bd. 53, pt. I, p. 388, 1887.— E. Nauck, Zeits. Wiss. Zool., Bd. 34, 



p. 46, 1880, (Gastric teeth). — Lenz and Richters, Abh, Senek. 



Ges. Bd. XII, p. 425, 1881.— Muller, Verb. Natur. Gesell. Basel, 



Bd. VIII, p. 473, 1886. 

 ? Calappa tuherculosa Guerin, Meneville, Icon. Regne Anim. Crust. 



t. II, pi. 12, figs. 2, a-b, 1829. 

 ? Calappa sandwichien {Calappa tuherculata variety) Eydoux and 



Souleyet, Voy. "Bonite," vol. I, Zool. p. 245, pi. 3, figs. 9, 10, 



1841-52. 



Family: LEUCOSIIDAE. 



Subfamily : Leucosiinae. 



Genus: ACTAEOMORPHA Miers. 

 Actaeomorpha alvae, new species. 



Plate 11. 



Type : One male, taken in coral at Teviatoa Reef, Raiatea Island, 

 Society Islands, South Pacific Ocean, August 21, 1931, by the "Alva." 

 Deposited in the Vanderbilt Marine Museum. 



Distribution : So far known only from the holotype. 



Color : Preserved specimen : old ivory. 



Technical description : Carapace cancroidal, octagonal, with the 

 dorsal surface very nodulose; the frontal region is about one-third of 

 the maximum width of the carapace and is deflected, composed of two 

 widely rounded lobes separated by a median sulcus that extends back- 

 ward on the gastric region. The superior orbital margin is small and 

 unbroken ; the anterolateral margin is wide, crenulate and consists of 

 a depressed, slightly rounded anterior half that is united at an angle 

 with the second or median half of the lateral margin, which is sub- 

 parallel to the opposite side of the carapace and is united at a similar 

 angle with the postlateral margin, which is crenulate and decidedly 

 convergent posteriorly. The posterior margin of the carapace is 

 straight, sublaminate and parallel to the frontal margin. The dorsal 

 surface of the carapace is curiously sculptured, there being a pair of 

 large, convex, submedian lobes on the gastric region, well separated 

 from each other and from a second pair of similar slightly smaller 

 lobes that lie one on each side of the mesobranchial region. The uro- 

 gastric region is defined and the cardiac region is outlined by a series 



