Barnacles of the Genus Scalpellum. 99 



the tergal apex, and the occludent margins of both tergum 

 and scutum may be either straight or concave. The carina 

 has a broadly convex ridge in the middle of the roof, bor- 

 dered by a shallow concavity on each side, and the parietes, 

 which are broad above and narrow below, are inflected at a 

 sharp angle. In a very small specimen (capitular length 

 4*5 mm.) the carina is more strongly curved than in larger 

 specimens, and its apex, instead of projecting freely, enters 

 between the terga. 



Kriiger's specimens reached a much larger size (capitular 

 length 29 mm.), and, in some cases at least, the peduncle 

 greatly exceeded the length of the capitulum. 



The two subequal rami of the first cirrus have, in one 

 specimen, 13 and 14 segments respectively ; in the sixth 

 cirrus the numbers are 21 and 19. The caudal appendages 

 resemble those figured by Annaudale for S. nudipes. The 

 proportions of the penis and the structure of the mouth- 

 parts agree in general with Kriiger's account. 



One of the hermaphrodites carried a single dwarf male, 

 about 1*25 mm. in total length, wedged between the occlu- 

 dent margins of the scuta on the outer surface of the adductor 

 muscle. It differs considerably from Kriiger's figure in 

 having the valves of the capitulum much larger and more 

 regularly formed. It resembles Darwin's figure of the male 

 £. villosum (' Lepadidas/ pi. vi. fig. 4), except that the strongly 

 curved rostrum is much larger, the scutum more than twice 

 as wide as the tergum, and the integument without con- 

 spicuous spines, in these respects approaching Anuandale's 

 figure of the male S. nudipes. On one side the base of the 

 rostrum has been cracked, separating off a small plate 

 similar to those found by Annaudale on each side of the 

 carina in the male of S. nudipes, and suggesting that the 

 latter plates are also due to accident. 



Scalpellum (Smiliuni) nudipes, Annaudale. 



Scalpellum (Smilium) nudipes, Annandale, Journ. Straits Brand) Roy. 

 Asiatic Sue. no. 71. 1916, p. 287, pi. iv. fig. 1, pi. v. ii^s. l-(j, pi. vi. 



1,2. 



Locality.— Lat. 10° 22' 30" S., long. 120° 7' 30" E. (Java- 

 Australia), 130-500 fathoms. 1 $ , 1 c?*. 



* This specimen, transferred to the Museum 'S ago from the 



Netlay Hospital collection, bears on the label exactly the indications of 

 position and depth given by Annaudale for the holotype, with the addi- 

 tional information that, a- he suspected, the latitude is south of the line. 

 It may he assumed, therefore, thai this specimen also formed part of the 

 collection made by Capt. F. Worsley of the C./S. ' Sherard Osborn.' 



7* 



