ADDENDA ET COKRIGENDA. 



Page 19. — Homologies of Crustacea. — This subject, in its bearing on different 

 groups of Crustacea, is treated of on pages 429, 503, 849, 1024, 

 1028, 1307, 1383. 



" 92. — Under Qhorilia longipes, add the locality, Oregon. 



" 284. — Under Thalamita crassimana, add the locality, Feejee Islands. 



" 292. — Under Platyonychus purpureus, add the locality, Valparaiso. 



" 304. — The title, Family III. Corystidae, should precede the genus Tel- 

 messus, on page 303. 



" 320. — Under Helcecius cordiformis, add reference, Gfelasimus cordiformis, 

 Latr., Edwards, ii. 53. 



" 347. — Under Planes cyaneus, longitude 105° is west. 



" 379. — Liriopea of Nicolet (in Gay's Historia de Chile, iii.) is identical with 

 Halicarcinus of A. White, and of more recent date. It is also an 

 objection to the name that it is so near Liriope. 



" 394. — Under Calappa fornicata, add the locality, Feejee Islands. 



" 426. — The name Porcellana armata has been employed by L. R. Gibbes 

 for a Florida species, and the author therefore would change the 

 name of the Balabac species to Porcellana spinuligera. 



" 444. — The name Pagurus pubescens is applied by Kroyer to a northern 

 species ; and as it is probably a Bernhardus, the author has changed 

 the name of jhis species to B. scabriculus (see Proc. Acad. Nat. Sci. 

 Philad., Jan. 1852, p. 6). 



" 517. — Ibacus antarcticus, should be Parribacus antarcticus. 



" 534. — Periclimenes of Costa (Fauna del Regno di Napoli, 1836) has the 

 general form and habit of Anchistia, and the two may be identical ; 

 but the description contains no information as to whether the man- 

 dibles are palpigerous or not, and in other points it is defective. 



" 534. — Cryptophthalmus of Rafinesque is retained by Costa (loc. cit.), 



399 



