Barnacles of the Genus Scalpellum. 109 



Remarks. Gravel and other writers have already admitted 

 a considerable range of variation in the characters of this 

 species, and I therefore record as belonging to it a number 

 of specimens which differ a good deal from one another and 

 from the holotype. Most of the specimens group them- 

 selves round Hoek's paratopes from Cape St. Vincent, and 

 with this series the holotype of S. eximium may be asso- 

 ciated, as well as most of the specimens described or figured 

 by later authors. The holotype of S. velutinum differs 

 especially in having much more numerous, narrower, and 

 more closely set peduncular scales. In addition, the tergum 

 is longer and narrower, the scuto-tergal angle of the upper 

 latus is more acute (about 47°), and that valve has no por- 

 tion of its convex base touching or opposed to the carina. 



The specimen recorded above from lat. 10° 45' S., long. 

 120° 50' E., differs a good deal from all the others, and is only 

 placed here with some doubt. The width of the carina at 

 the base is hardly more than one-fifth of its length, and the 

 marginal ridges of the roof are wanting altogether in the 

 lower half and only slightly marked towards the apex. The 

 upper latus has the scuto-tergal angle less acute (about 70°), 

 and the curved basal margin extends upwards alongside the 

 carina for some distance, the tergum being correspondingly 

 shorter. 



In all the specimens the caudal appendages are rather 

 stout and do not differ greatly in length from the peduncle 

 of the sixth cirrus. They seem to consist of from four to six 

 segments, but, as Gruvel notes, some of the seven or eight 

 segments which he counts are very indistinct. The carina is 

 by no means always, as Pilsbry states, " squarely truncate " 

 below ; in many specimeus ,it is rounded or even, as in the 

 holotype of Hoek's S. eximium, distinctly angled. In none 

 of our specimens is there any trace of a penis. 



Annandale's record from 1200 fathoms (Rec. Ind. Mus. 

 ix. 1903, p. 230) refers, as shown below, not to this but to 

 the next species. 



Scalpellum {Scalpellum) annandalei, sp. n. 

 (Text-fig. 3.) 



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

 1200 fath. C./S. ' Electra.' 1 g (holotvpe). 



Lat. 10° 45' S., long. 120° 50' E. (Java-Australia), 700 

 fath. C./S. ' Patrol/ 1 % (paratype). 



Description. — Capitulum oblong-oval, its height more than 



