OPHTHALMIC GANGLIA AND EYES. 



49 



(/,/,) united and together as large as the collar nerve, 

 rises, and can be traced running unbranched, in a nearly 

 straight line, for a length equalling the whole rest of the 

 nervous chord, so as to supply the peduncle and the inside 

 of the capitulum or sack. At the inner ends of these two 

 same ganglia, from a central point where they are united, 

 a little central branch rims in front to the adductor 

 scutorum and other adjoining muscles ; and still smaller 

 fibrils run behind to the oesophageal muscles. 



Ophthalmic Ganglia and Eyes. — Owing to Professor 

 Leidy's* discovery of eyes in a Balanus, I was led to 

 look for them in the Lepadiclse. Extending from the front 

 of the two supra-cesophageal ganglia, two chords may be 

 seen in Lepas fascicularis (of which a rude diagram is 

 here given), to run into two small, perfectly distinct oval 



Diagram of the anterior portion of the nervous system in Lepas fascicularis. 

 A. First thoracic or infra-cesophageal ganglion. B. Second thoracic. 

 C. Third thoracic ganglion. D. Supra-cesophageal ganglion. E. The two 

 ophthalmic ganglia. F. Double eye. a. Nerve going to first cirrus ; b, to 

 the muscles below the first cirrus; c, to the second cirrus; d, to the third; 

 e, nerves running to the ovaria ; /, double nerves supplying the sack and 

 peduncle. 



* Proceedings of the Academy of Natural Sciences, Philadelphia, 

 vol. iv, Jan. 1848. 



No. i, 



