376 Proceedings of the Royal Physical Society. 



Genus (2) Conchoderma, Olfers, 1814. 



2. Conchoderma aurita (Liune). 



1767. Lepas aurita, Linn., Systenia Naturie, ed. xii., vol. i. part ii. 



p. 1110. 

 1851. Conchoderma a Ltrita, Darwin, I. c, p. 41, pi. iii. fig. 4. 



Hah. — Attached to floating timber (Edin. Mus., Leslie and 

 Herd man). 



3. Coyichoderma virgata (Spengler). 



1790. Lepas virgata, Spengler, Skrift. ISTaturh. Selbsk., vol. i., pi. vi. 



fig. 9. 

 1851. Conchoderma virgata, Darwin, I. c, p. 146, pi. iii. fig. 2; 



pi. ix. fig. 4. 



Hah. — Attached to floating timber (Edin. Mus., Leslie and 

 Herdman). 



Family Balanid^. 

 Genus (3) Balanus, Da Costa, 1778. 



4. Balanus porcatus, Da Costa. 



1778. Balanus porcatus, Da Costa, Hist. Nat. Test. Brit., p. 249. 

 1854. ,, ,, Darwin, Monograph: Balanidse, p. 256, 



pi. vi. figs, ia-ie. 



Hah. — Not uncommon attached to stones, etc. (Leslie and 

 Herdman). 



5. Balanus crenatus, Bruguiere. 



1789. Balanus crenatus, Bmguiere, Encycl. Method, (des vers). 

 1854. ,, ., Darwin, I. c, p. 261, pi. vi. figs. 6a-6g. 



Hah. — Shore at Portobello (Leslie and Herdman). East 

 side o(" Inchkeith. 



6. Balanus halanoides (Linne). 



1767. Lepas halanoides, Linn., Systenia Naturse, vol. i. part ii. 



p. 1108. 

 1854. Balanus halanoides, Darwin, I. c, p. 267, pi. vii. figs. 2a-2d. 



Hah. — Common on rocks and stones between tide-marks, 

 and also in deep water. 



