6 BULLETIN CO, UNITED STATES NATIONAL MUSEUM. 



MITELLA MITELLA (Linnjeus). 



1758. Lepas mitella Linnjei's, Syst. Nat., 10th ed., p. 668. 



1851. PoJMcipes mitella Darwin, Monograph on the Cirripedia, p. 316, pi. vii, 

 fig. 3. 



Localities. — No. 32891, Pag-o Pag-o, Tutuila, Samoan Islands, Sir 

 Charles Eliot, Sumatra, I. Lea collection. No. 32880, Tnron Ba}', 

 Cochin China, Isaac Lea collection. No. 32881, Hongkong-, China, 

 Wm. Stimpson, North Pacific Exploring Expedition. No. 32892, 

 Fusan, Korea, P. L. Jouy. Nos. 22392. 25379, and 26708, Japan, 

 li. Hitchcock and H, Loomis. No. 1(3295, near Enoshima, Japan, 

 F. Stearns. 



Genus LITHOTRYA Sowerby. 



1851. Lithotrt/a Darwin, Monograph on the Cirripedia, Lepadidpe, p. 332. 



LITHOTRYA PACIFICA Borradaile. 



1900. L. pacifica Borradaile, Proc. Zool. Soc, p. 798, pi. li, figs. 3, 3a (Funafuti, 

 outer reef) . 



Localities. — Makemo, Paumotus, on the reef, Albatross., October 

 21, 1899. Funafuti, Ellice Islands, reef, Alhatross, December 24, 1899. 



This form is probably not distinct specifically- from L. nicohcirlca 

 Reinhardt, which, however, has the lateral plate shorter. Many of 

 the specimens taken at Paumotus are much larger than Borradaile's 

 t3'pe. An adult but not old example measures: total length, 62 mm.; 

 length of carina, 19.5 mm.; carino-rostral diameter of capitulum, 15 

 mm. A small example was collected at Funafuti, the type locality. 



LITHOTRYA DORSALIS (Ellis). 



1851. L. dorsalis Ellis in Darwin, Monograph on the Cirripedia, Lepadidse, 

 p. 351. 



Localities. — No. 11529, San Salvador, Albatross, 1886. Specimens 

 are also reported as in the Museum from Jamaica and Porto Rico. 



Genus SCALPELLUM Leach. 



1817. Scalpellum Leach, Journal de Physique, de Chimie, d'histoire naturelle et 



des arts, LXXXV, p. 68. 

 1851. Darwin, Monograph on the Cirripedia, Lepadidse, p. 215. 

 1883. HoEK, Challenger Report, VIII, Cirripedia, y>. 59. 

 1905. Gruvel, Monographie des Cirrhipedes, p. 23. 



Scaljjellum is much the largest and most varied genus of Pedunculate 

 cirripedes, numbering about 1-40 species. The types of 38 species and 



7 sul)species arc in the collection of the Museum. A ver}- large pro- 

 portion of the species occur in depths of over 100 fathoms, and new 

 forms are constanth' brought to light b}^ the various expeditions for 



