THE CRUSTACEA OF NEW JERSEY. i6i 



of ships, etc., and also occurs in brackish water. It is found 

 associated on ships' bottoms with Balanns tinfinnahulum, B. 

 amphitrite and B. improvisus, according to Darwin. 



It has been obtained at Seaside Park, Beesley's Point, Sea 

 Isle City and live miles below^ Port Republic, in New Jersey. 

 I obtained it on floating logs near Ocean View, Virginia. Mr. 

 Witmer Stone found it at Point Pleasant. 



Genus CHELONOBIA Leach. 



The Turtle Barnacles. 



Chelonibia Leach. Journ. Phys. Chim. H. Nat. Paris, LXXXV, 1817, p. 67. 



Atypic. (Type Lepas tcstudinaria Linnjeus.) 

 Chelonobia, auct. 

 Astrolcpas (Klein) Gray, Ann. Philos. (n. s.), X, 1825, p. 105. Type Lepas 



testudinaria Linnaeus, first species. 



Compartments extremely thick, six. But one of them, the 

 rostrum, internally composed of three rudimentary compart- 

 ments, united together. Basis membranous. Scuta narrow, 

 united to terga by horny articular ridge. 



Distributed world-wide in tropical and warm temperate seas. 

 Found attached to smooth gastropod molluscs, Crustacea, and 

 sea turtles. 



Chelonobia testudinaria (Linngeus). 



Plate 48. 



. Turtle Barnacle. 



Lepas testudinaria Linnaeus, Syst. Nat., Ed. 10, 1758, p. 668. /« Pclago (saepe 



in Testudinibus). 

 Clieloiiobia testudinaria Darwin, Monogr. Cirrip., 1854, p. 392, PL 14, figs. 



la-id, fig. 5, PI. 15, fig. I. (Mediterranean, Atlantic Ocean, Pacific 



Ocean.) 



Description. — Shell strong, globulo-conical, outline broadly 

 oval, surface smooth when well preserved but when disinte- 

 grated upper part finely striated. Color dead white. Orifice 

 oval elongated, rather exceeding in length one-third of longer 



II MU 



