. Bulletin - United States National Museum. Science. THE SESSILE BARNACLES. 117 The description, figs. 29, 30a, h, and pi. 25, figs. 2, 3, are from south coast of England (Exmoiith) specimens, and represent the tyi^ical form of the species. Several specimens taken in 34 fathoms, 10 miles east of the north end of Patros Island, Brazil,^ presented to the United States National. Fig. 30.—Terga of Balantjs sfongicola. a, 6, Exmouth. c, off Patros Island, Brazil; alldra\vn to same scale. A, Balanus calidus. Museum by Dr. R. Rathbun, taken by the steamer Norseman, Cat. No. 14144 , grew with
. Bulletin - United States National Museum. Science. THE SESSILE BARNACLES. 117 The description, figs. 29, 30a, h, and pi. 25, figs. 2, 3, are from south coast of England (Exmoiith) specimens, and represent the tyi^ical form of the species. Several specimens taken in 34 fathoms, 10 miles east of the north end of Patros Island, Brazil,^ presented to the United States National. Fig. 30.—Terga of Balantjs sfongicola. a, 6, Exmouth. c, off Patros Island, Brazil; alldra\vn to same scale. A, Balanus calidus. Museum by Dr. R. Rathbun, taken by the steamer Norseman, Cat. No. 14144 , grew with B. amphitrite niveus. Externally they do not differ from pale examples of the Enghsh B. spongicola, but the scuta are somewhat narrower, and the terga (fig. 30c) have the basal margin a little more hol- lowed out on both sides of the spur, which is noticeably narrower. The basal diameter is 13 mm. in the largest example (pi. 25, figs, 4-4c). The dried bodies of these specimens were much broken, but I note that the mandible is very similar to that of B. calidus. It has the fom'th tooth conic though short, the fifth very small, and largely united with the obtuse lower point. The maxilla has an even edge, and nine spines between the upper and lower large pairs. The third cirrus has minute bifid and trifid spines near the distal borders of the lower five segments, which alone were preserved. The fourth cirrus 1 Unable to locate Patros Island, I applied to Dr. R. Rathbun, who replied as follows: "We exhausted every resource at the Museum in an effort to locate Patros Island, and then I appealed to the Hydrographic Ollice of the Navy, but they have not met with better success. The facts are these: When I was in Brazil between 1875 and 1878, \\ith headquarters at Rio de Janeiro, I came in contact with the officers of the British steamer Norseman, which was the repair steamer for the cable along the Brazilian coast. Small specimens used to be brought up attached to the cable or
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