I9I3-J N. ANNANDAI.E : Indian Barnacles, 235 



Injyamedian latus high, moderately narrow, pointed below, 

 angular above, where it is nearly as wide as the carmal latus. 



Rostral latus triangular, pointed below at the aperture, by no 

 means prominent. 



Rostrum minute, almost entirely concealed ; possibly some- 

 times absent. 



Peduncle cylindrical, much shorter than capitulum, covered 

 with prominent, transverse, alternating scales closely compacted. 



I have dissected out the appendages of a specimen but can 

 find no difference in them likely to be constant from those of 

 S. lambda, except in the following points : — the two rami of the 

 first cirrus are equal (possibly a variable character) and the anal 

 appendages consist of only 6 segments instead of about 8. 



The mandibles are perhaps abnormal ; the three outer teeth 

 are subequal and equidistant, but the inner angle is produced and 

 forms a projecting portion of relatively large size and with nearly 

 parallel but somewhat irregular edges ; at its extremity it bears 

 two teeth, of which the inner tooth is bent towards the outer one. 



Type No. '"^ Crust. Ind. Mus. 



Locality. Andamans ; 130 — 250 fathoms. 

 Males not observed. 



Possibly Scalpellum longius as here described is merely a com- 

 plete form of S. lambda, but the structure and position of the 

 posterior basal parts of the carinal latera of the two forms are very 

 different ; in S. lambda these meet over the base of the carina 

 and have the shape of regular isosceles triangles in contact for the 

 whole of their bases, and their surface is smooth. Unless or until 

 intermediate specimens are obtained, the two must, therefore, 

 be regarded as specifically distinct. The greater relative height of 

 the capitulum is quite probably an inconstant feature. 



S. longius will be figured, with 5. lambda, in an account of the 

 Indian species of the families Scalpellidae (=Pollicipedidae, mihi, 

 1909 ') and Iblidae which is now in the course of preparation but 

 will not be ready for publication for some little time. 



12. Scalpellum laccadivicum, Annandale. 



Scalpellum laccadivicum and var. investigatoris , Annandale, 

 Ann. Mag. Nat. Hist. (7) XVII, p. 393 (1906); ///. 

 Zool. ' Investigator,' Crust. Ent., pi. I, figs. 3, 4 (1907)- 



Scalpellum subflavum, id., ibid., p. 397 (1906) and pi. I, fig. 6 

 (1907). 



1 "An account of the Indian Cirripedia Pediinculata, Pait i. — Family Lepadi- 

 dae (sensu stricto)," Mem. Ind. Mus. II, p. 63 (1907), 



