

35 mm. 







25 



» 







53 



» 







17 



}> 





22 



}' 30' 



' (?S), 



long. 



ra 



Sea. 



They 



were 



BABNACLES FROM DEEP-SEA CABLES. 293 



numbered 9318/10, Crustacea in the books of the Zoological Survey 

 of India. There is a eotype in the Baffles Museum. 



Height of capitulum 

 Breadth of capitulum 

 Length of peduncle 

 Diameter of peduncle 



The two specimens were taken in lat. 10' 

 120° r 30" E. (130-500 fathoms) in the Java Sea. 

 attached side by side to the cable. 



The differences in the three varieties of this species may per- 

 haps be correlated with differences in environment. The specimens 

 of the typical form were found attached to a telegraph cable or to 

 one another and those of var. pellicatum probably to the spines of 

 sea-urchins. In the first instance there was obvious opportunity 

 for free growth and rapid reproduction, in the second the short 

 peduncle may have been of advantage in permitting the guests to 

 lie closer to their host and so to receive full protection from its 

 spines ; but I am unable to suggest an explanation of the long 

 peduncle and thick investment of the var. parviceps. 



Scalpellum stearnsi, Pilsbry. 



? 1851. Scalpellum magnum, Darwin, Mon. Fossil Lepadidae, p. 18, pi. i, 

 fig. I- 



1890. Scalpellum Stearnsi, Pilsbry, Proc. Acad. Nat. Sci. Philadelphia, 



p. Ill, fig. 



1891. Scalpellum calcariferum, Fischer, Bull. Soc. Zool. France, XVI, p. 



116, fig. 

 1905. Scalpellum inerme, Annandale, Mem. As. Soc. Bengal, I, p. 75, pi. 



viii, figs. 1, 2. 

 1907. Scalpellum stearnsi varr. roousta and gemina, Hoek, Siooga-Fxp. 



mon. XXXI a (Cirripedia Peduncnlata), p. 69, pi. vi, figs. 1-12. 

 1907. Scalpellum stearnsi and S. inerme, Pilsbry, Bull. V. S. Nat. Mus., 



Xo. 60, p. 11. 

 1909. Scalpellum stearnsi, Annandale, Pec. Ind. Mus., Ill, p. 270. 

 1907. Scalpellum stearnsii, Kriiger, A'bli. E. Bayer. Ale. Wiss., Suppl.-Bd. 



II, p. 18, pi. ii, figs. 18, 19. 



I have already pointed out {op. cit., 1909) the close resem- 

 blance between recent examples of this species and Darwin's figure 

 of the fossil S. magnum 1 of the Coralline Crag of Sudbourne. 

 Apart from possible anatomical differences, which of course cannot 

 be discussed, I would have no hesitation in regarding the fossil and 

 the recent form as specifically identical. 



Scalpellum stearnsi was described under that name by Pilsbry 

 in 1890 and redescribed as 5. calcariferum by Fischer in the follow- 

 ing year. In 1905 I described S. inerme, which I now believe to be 

 merely an extreme form of the species, without recognizing its true 



1. This resemblance was first noticed by Fischer in 1891, op. cit., 

 p. 118. 



R. A. Soc, No. 74, 1916. 



