500 A CORNISH FAUNA. 



We have dredged it in Cawsand Bay, and Mr. Longhrin has 

 sent it to us from Polperro. 



Genus, Aora. — Kroyer. 

 Zidst. %ur 2, I, p. 335. 

 First hand larger than the second, and formed by third joint 

 having the infero- anterior angle produced to meet the extremity 

 of the finger. 



AoRA GRACILIS. — Spence Bate, Cat. Amph. Brit. Mus., p. 160,^/. 

 xxix,jig. 7. — Bate and West-wood, I.e., p. 281. 

 We took our first specimen on the coast of Grlamorgan ; we 

 have since obtained it from St. Ives and off the Eddystone. 



It is remarkable that the only other species of this genus known 

 is that described by Kroyer and Nicolet, and closely resembling 

 this in form, it is from the coast of Chili. 



Genus, Microdeutopus. — Costa. 



First pair of antennae larger than the second. First hand 

 larger than the second. 



Microdeutopus websterii. — Spence Bate, Cat. Amph. Brit. Mus., 

 p. 162, pi. XXX, Jig. 2. — Bate and Westwood, p. 291. 

 Mr. Webster dredged this species in Falmouth harbour. 

 Microdeutopus versiculatus. — Spence Bate, Cat. Amph. Brit. 

 Mus., p. 165, pi. XX, Jig. 5. — Bate and Westwood, p. 295. 

 We have dredged this species in Plymouth Sound. 



Genus, Gammarella. — Spence Bate. 

 Cat. Amph. Brit. Mus, p. 179. 

 First pair of antennae with second appendage. First hand 

 small, second large. Last appendage of the tail single, brown. 

 Telson, single, cleft. 



Gammarelda brevicaudata. — Milne Edioards, Mist, des Crust., t. 

 Hi, p. 53. — Bate and Westivood, p. 331. 

 The first specimen of this species was taken by Milne Edwards 

 at Morbihan, on the coast of France, Our specimen was taken 

 by Mr. Loughrin, at Polperro. 



Genus, Melita. — Leach. 

 Edin. JEncy., Hi, p. 403. 

 Fiist antennae longer than second, appendiculate. Second 

 hand longer than the first. 



