Barnacles of the Genus Scalpellum. 123 



as long as wide and its occludent margin is nearly straight. 

 The rostral latus is a good deal lower than in Pilsbry's 

 figure and the inframedian latns is twice as broad at the 

 base as it is high. The fifth cirri have about 25 segments, 

 the median ones with four to five pairs of large and one pair 

 of smaller spines anteriorly, and five to seven setae on inner 

 face of middle segments of endopod. The caudal appendages 

 are very slender and have about 20 segments. The penis is 

 about half as long as the sixth pair of cirri, stont, tapering, 

 and pilose except near the tip. Pilsbry describes it as 

 '• extremely long and slender, with some short, very sparsely 

 scattered, hairs/' In other respects the specimen agrees 

 very well, with Pilsbry's account. The minute holotype, 

 which is now somewhat imperfect, agrees generally with 

 Pilsbry's figure, although with slight differences in the 

 proportions of the plates, no doubt correlated with the 

 great difference in size. The caudal appendages have about 

 or 7 segments and do not exceed the peduncle of the sixth 

 cirri in length. One characteristic feature shown by the 

 holotype, by Pilsbry's figure, and very conspicuously by the 

 present specimen, is the prominence of the carinal row of 

 peduncular plates which project as a series of teeth, bluntly 

 angular and slightly curved downwards. 



Scalpellum (Scalpellum) novce-zelandia, Hoek. 



Scalpellum noccv-zelandice, Hoek, Rep. 'Challenger' Cirripedia, 1883, 



p. 124, pi. v. tips. 7, 8; Gruvel, Exp. ' Travailleur ' et 'Talisman,' 



• Chrhipedes, 1902, p. 54, pi. ii. figs. 12, 13, 15; Annandale, lllustr. 



Zool. ' Investigator ' Crust. Entoin. pi. v. fig. 7 (1908) : id. Eec. Ind. 



Mus. ix. 1913, p. 231. 



Locality.— Lat. 14° 20' N., long. 52° 30' E. (Gulf of Aden), 

 1200 fath. C./S. 'Electra.' 2 <?. 



Remarks. — Our specimens v\ere identified by Dr. Annan- 

 dale and I leave them under the name which he gave them. 

 It is to be noted, however, that the larger of the two 

 (capitular length 17 mm.) has the roof of the carina 

 distinctly convex and the apex extending further towards 

 the tip of the tergum than it does in the holotype. Eoth 

 features tend to assimilate the specimen to "the closely 

 allied S. flavum, Hoek. The other specimen differs still 

 more from the holotype, but as it is much damaged it 

 si ems unnecessary to discuss its characters at length. 



