492 Zoological Society: — 



Pleon having a double excavation on the posterior margin, the central 

 point not extending beyond the extremity of the sides. Superior 

 antennae reaching to the extremity of the fourth segment of the in- 

 ferior. Inferior antennae nearly two-thirds the length of the animal. 

 Posterior pair of pleopoda as long as the posterior margin of the 

 pleon, terminating in two styliform rami, each of which is tipped with 

 a few short hairs. 



This species was taken from a sponge dredged in about eight 

 fathoms of water in Esquimalt Harbour. 



The specific name is derived from the circumstance of the animal 

 having been found in the territory of the tribe of Wakish Indians. 



Tanais loricatus, n. s. 



The only specimen in the collection is imperfect. The first segment 

 of the pereion appears to be imperfectly fused with the cephalon. 

 Inferior antennae scarcely half the length of the superior. First pair 

 of gnathopoda having the propodos ovate ; dactylos short and tumid, 

 shorter and less pointed than the digital process of the propodos. 

 Pereiopoda having the first three joints short and broad, being affixed 

 to the side of the pereion like plates of mail (hence the specific name) ; 

 they terminate in short pointed dactyli, and have the propodi armed 

 with two lateral rows of strong, black, pointed teeth. 



This species was taken from the hollow of a sponge dredged in 

 Esquimalt Harbour, at the depth of about ten fathoms. 



Ione cornuta, n. s., Bate. 



The male differs from the description of the European species 

 chiefly in having the caudal extremity terminating obtusely, and in 

 having shorter antennae. 



The female has the antero-lateral hornlike process of the cephalon 

 curved posteriorly. The pereion is not quite equilaterally developed. 

 The coxae of the four anterior pairs of pereiopoda are round, and all 

 attached to the antero-lateral margin of the segments of the pereion. 

 The coxae of the three posterior are the larger, and produced poste- 

 riorly to a point. The pleopoda are long, and fringed with arbores- 

 cent branchiae. 



This is the only species known, besides that taken by Colonel 

 Montagu on the southern coast of England. 



Length, male \, female | of an inch. 



Taken attached to the branchiae of Callianassa longhnana. 



Jan. 10, 1865.— Dr. J. E. Gray, F.R.S., in the Chair. 



Notice of a New "Whalebone Whale from the Coast 

 of Devonshire, proposed to be called Eschrichtius 

 robustus. By Dr. J. E. Gray, F.R.S., etc. 



A better proof could not be required of the little attention that 

 has hitherto been paid to the study of the Whales of the seas sur- 

 rounding the British islands than the fact that, almost immediately 

 after the appearance of my paper on British Whales, in which I had 



