122 Dr. W. T. Caiman on 



following particulars are taken from the larger of our 

 specimens. Mandible with four teeth, the interval between 

 the two distal not quite twice that between first and second. 

 First cirrus with exopod considerably expanded, segments 

 1.2 and 15. Sixth cirrus with about 35 segments in exopod, 

 five pairs of spines on middle segments with shorter setse 

 between, no conspicuous setae on inner face of endopod. 

 Caudal appendages as long as peduncle of sixth cirrus, 

 slender, with a stouter base, consisting of about 7 segments. 

 f'enis stout, tapering to an acute tip, at least half as long as 

 sixth cirrus. 



This species is evidently closely allied to the Malayan 

 S. sociabile, Annandale, a species which, like that of Pilsbry, 

 includes named varieties. As regards the capitular valves, 

 the differences between West Indian and Malayan specimens 

 are not great, the relatively longer carina extending beyond 

 tbe distal third of the tengum in the present species, and 

 the more complete disappearance of the marginal ridges of 

 that valve in S. sociabile being perhaps the most important. 

 The scuto-tergal angle of the upper latus is more acute in 

 S. sociabile. The caudal appendages, however, differ con- 

 siderably. In S. sociabile the basal segment is greatly 

 expanded, and exceeds the length of the distal segments 

 together. In S. portoricanum the basal segment is little 

 expanded and not more than half as long as the distal 

 portion. 



If our specimens are correctly identified with Pilsbry 's 

 species their occurrence so near the type-locality is suggestive 

 of a very restricted area of distribution. 



Scalpellum [Scalpellum) rubrum, Hoek. 



Sealpellum rubrum, Hoek, Rep. ' Challenger ' Cirripedia, 1883, p. 91, 

 pi. iv. tig. 18; Pilsbry, Bull. Bur. Fish. Washington, xxix. 1911, 

 p. 02, pi. viii. figs. 1-4, text-fig. 1. 



Locality.— -Lat. 7°35 / S., long. 114° 30' 30" E. (Java Sea), 

 73-175 flith. C./S. ' Recorder.' 1 g . 



Remarks. — The holotype in the 'Challenger' collection 

 is very minute (length of capitulum 5 mm.), but Pilsbry 

 has described and figured specimens of 17 mm. capitular 

 length. The specimen in the present collection is nearly 

 twice as large (capit. length 32 mm.) as those described by 

 Pilsbry, but is without doubt referable to the same species. 

 It shows no trace of red coloration except on the upper part 

 of the roof of the carina. The tergum is more than twice 



