THE SESSILE BARNACLES. 47 



three pairs of spines on each, Tlie caudal appendages are 2 mm. 

 long, much shorter than the protopod of cirrus vi, composed of 10 

 segments, and copiously hairy. Tlie cirri and caudal appendages 

 are much hke those of V. euglypia, but the latter are shorter in com- 

 parison to the size of the barnacle. 



A smgle entire specimen of this large Verruca was obtained, but 

 several valves were taken at a station at the other end of the archi- 

 pelago. It is chiefly notable for the flat top, absence of salient 

 umbones, and the generally inornate appearance, somewhat like 

 V. coraliopJiila, which belongs to the same group. It is one of the 

 largest Verrucas yet described, and the only one known from the 

 northern Pacific. It is a truly deep-sea species, which may prove 

 to have a wide distribution. V. capsula Hoek, 1913, from the Malay 

 Archipelago in 513-1,300 meters seems, from the figures and descrip- 

 tion, to differ very little from V. luilotheca. I doubt whether it is 

 specifically distinct. Both of these species are closely related to 

 V. magna, Gruvel, from the Gulf of Gascoyne. 



VERRUCA INTEXTA Pilsbry. 

 1912. Verruca intexta Pilsbry, Proc. U. S. Nat. Mua., vol. 42, p. 292. 



Type.— Cat. No. 43468, U.S.N.M. 



Type locality. — Albatross station 5259, off northwestern Panay, 

 312 fathoms. 



This species belongs to the group of V. nexa. 



VERRUCA ALBATROSSIANA Pilsbry. 



1912. Verruca albatrossiana Pilsbry, Proc. U. S. Nat. Miis., vol. 42, p. 292. 

 Type.— Cat. No. 43472, U.S.N.M. 



Type locality. — Albatross station 5447, east of Luzon, 310 fathoms. 

 This species and the preceding wiU be illustrated in a report on 

 the Cirripedia of the Albatross Philippine cruise. 



Suborder BALANOMORPHA. 

 1905. Operculata, tribe Symetrica Gruvel, Monographie des CirrhipMes, p. 189. 



KEY TO FAMILIES AND SUBFAMILIES.^ 



a'. Rostrum having radii; lab rum with au angular notch or cleft in the middle. 



Family BALANIDJ], p. 48. 

 b^. Opercular valves together as large as the orifice, the scutum and tergum articu- 

 lated together Subfamily Balanin.e, p. 49. 



fc2. Opercular valves together not nearly as large as the orifice; basis membranous. 



c*. Compartments six, but the rostrum is divided into three by fine sutures, visible 



within; wall porose, or if filled up, having radial lamellaj at the base; the 



sheath forms the wall of the body chamber, reaching to the base, where it is 



deeply, irregularly notched; articular ridge of the scutum chitinous. 



Subfamily CnELONiBUNiE, p. 262. 



c2. Compartments six, the rostrum undivided; scutum and tergum not articulated 



together, sometimes absent Subfamily Coronulin^, p. 268. 



» For convenience in identification, the arrangement of the key Is artificial. 



