REPORT ON THE CIRRIPEDIA. 1 ."»."> 



Terga (figs. 31 and 33) exhibil traces of longitudinal striae. There is no longitudinal 

 furrow, but, as in Balanus amaryllis, the scutal margin is distinctly curved. The 

 valve is slightly beaked. The spur is short and no1 very narrow; its length equals its 

 distance from the basi-scutal angle. The two parts of the basal margin of the ti-ronm 

 which are separated by the spur describe together an angle little greater than 90°. 

 The crests for the depressors are very distinctly developed. 



Mouth. — Labrum with three distinct teeth on each side of the notch. Palpi lo 

 surface covered by numerous slender spines. Mandibles with five teeth, the lasl two of 

 which are small. Maxilla' with the edge quite straight, without any step-like pro- 

 jection; the first two arc only a little stouter, and before the lower extremity there are 

 again two, which are a little more robust. Second maxilla on their inner faces divided 

 into a large upper and a small inner and lower lobe. The first is almost totally covered 

 with long slender hairs, the second is only slightly hairy. 



Cirri. — First pair with very unequal rami ; the shortest ramus has the firs! segmenl 

 very long, and six following segments short; the longest ramus has the first long 

 ■;nent indistinctly divided into six segments ; moreover, it has nine segments following, 

 which'are much more slender than are the segments of the shortest, ramus. The second 

 cirrus has in both rami ten segments, which are produced on both sides. The pedicels 

 of the second, third, and fourth cirrus are furnished with dorsal tufts of spines. The 

 posterior cirri have segments more broad than long, bearing two pairs of nearly equally 

 long spines, and a third pair, beneath the first two, of very small spines. Between each 

 pair of long spines there is a small intermediate tuft. I have nol found out the basii 

 dorsal point at the penis. 



This species was taken at Station 204, November 2, 1874; hit. 1 2 4:;' N., long. 

 122° 10' E. ; depth, 100 and 115 fathoms; bottom, mud. 



Observations. — This species occurs at the same loca the nearly related Balanus 



amaryllis, viz., in the Philippine Archipelago. 



Section G. Parietes not permeated by pores. Radii wanting. Basis membranous. 



Balanus corolliformis, n. sp. (PI. VI. figs. 21, 22; PI. XIII. fig. 1 7). 



Basis membranous; radii absent; parietes not permeated by pores; tergum with a 

 very broad articular ridge ; membrane lining the growth-ridges with distinct spines. 

 Cardial and basal margins of the tergum nearly of the same length. 



This is a very remarkable species, and I confess to have been long in doubt whether 

 it was a Balanus or not. The investigation of specimens of a nearly related form 

 dredged by H.M.S. "Triton" in the Faroe Channel, which showed the same characteristic 

 differences from the other species of the genus, convinced me that I was right in consider- 



