igiS-] N, Annandale : Iftdian Barnacles. 231 



bearing numerous stout bristles ; posterior ramus slender, slightly- 

 longer than anterior ramus. 



Mouth-parts moderate. Mandible wide, with four subequal 

 teeth of moderate size ; the first widely separated from the others ; 

 the fourth (inner angle) pointed. The second maxilla moderately 

 wide; its cutting edge nearly straight but bearing a very narrow 

 incisure separated from the outer edge by three large and one 

 small bristle ; the stoutest of these bristles not much larger than 

 those on the edge within the incisure. 



Anal cirri short, cylindrical, slender, with 5 segments, of 

 which the basal (ist) is much the longest; 2nd and 5th segments 

 subequal, shorter than 3rd and 4th; four long subequal bristles 

 at apex; one long and one moderate bristle at apex of 4th seg- 

 ment posteriorly ; at least two shorter bristles in same position on 

 the 3rd segment. 



Penis absent. 



Type in the U.S. Nat. Mus. 



Distribution. ' Investigator ' stations 299 and 268 : Arabian 

 Sea, 23^43' N., 58°5i'3o" E. ; 1299 fathoms, and south of Cape 

 Comorin, 7°36' N., 78°5' E". ; 556 — 589 fathoms; Hawaiian seas; 

 315 and 222 to 498 fathoms (' Albatross'). 



S. pacificum is allied to S. novae-zclandiae , Hoek, from which 

 it may be distinguished b}' its stouter and more closely set valves, 

 by the greater breadth of the rostral latus and especially by the 

 formation of the posterior basal part of the carinal latera. Its 

 closest ally, however, is probably S. albatrossianum, Pilsbry, 

 although the two species fall technically into different subdivisions 

 of the subgenus in the system here provisionally adopted. 



5. Scalpellum novae-zclandiac, Hoek. 



Hoek, ' Challenger' Zool. Rep. VIII (Cirripedia), p. 124, pi. V, 

 figs. 7, 8 (1883); Gruvel, Rep. ' Travailleur' et 'Talis- 

 man,' Cirrhipedes, p. 54, pi. II, figs. 12, 13, 15 (1902) ; 

 Annandale, ///. Zool. ' Investigator,' Crust. Ent., pi. V, 

 fig. 7 (1908). 

 Two Indian specimens are in our collection obtained by the 

 * Investigator ' , one from the Andaman Sea (490 fathoms) and one 

 from Lat. 6^18' N., lyong. 90°4o' E. (1520 fathoms). They agree 

 fairly well with Hoek's original figure, but vary in certain charac- 

 ters, notably in the exact form of the valves of the lower whorl. 

 In one the inframedian latus is shaped like an hourglass ; and 

 in the other it is barely constricted at all. 



Scalpellum novae-zelandiae was originally obtained off New 

 Zealand by the ' Challenger ' in 700 fathoms. The ' Travailleur ' 

 took three specimens in lyat. 38°8' N., lyong. I2°3' E. in between 

 1314 and 1370 fathoms. The species, everywhere scarce, has thus 

 an even wider known range than S. velutitiwn, occurring in the 

 Pacific, Indian and Atlantic Oceans. 

 Type in the British Museum. 



