52 STALK-EYED CRUSTACEA. 



fathoms. The other species is represented by a single example from Sta- 

 tion 3425, 680 fathoms, and is portrayed on Plate X., Fig. 2. The rostrum 

 in this specimen is more tlian one half as long as the rest of the carapace, 

 and is forked at the tip, as in L. maia (Linn.) and L. murnvji Hend. There 

 is a long spine on the lower side of the base of the rostrum, directed for- 

 ward, and there are two pairs of lateral rostral spines. The second anten- 

 nal segment is armed with a long spine which bears a short spinule on its 

 outer side near the base. Length of carapace without the rostrum, 17 mm. ; 

 length of rostrum, 9 mm. ; breadth of carapace, 16 ram. 



Family CCENOBITID^. 



CCENOBITA Latr. 

 Fam. Nat. pp. 276, 277, 1825 \Cenobite\\ Cuvier's Regue Aiiiraal, 2= cd., IV. 77, 1829 lCa:nobiia\ 



Ccenobita compressus Guer. 



Voyage de " La CoquiUe," Zool,, T. II., Tart II., l™ Div., p. 29, 1830. 



Indefatigable Island, Galapagos, 1 male in shell of Nerita scahricosta. 

 Acapulco, Mexico, 21 specimens in shells of Nerita, Nassa, Murex, Tercbra, 

 Purpura, Modulus, Ceriihium, Natica, etc. 



Guerin's types of this widely distributed and variable species came from 

 Payta, Peru. A recent revision of the genus Coenohita, by E. L. Bouvier, will 

 be found iu Bull, de la Soc. Philomath.de Paris, 8""' Ser., IL 143-150, 1890, 

 and III. 21, 1891. 



Family PAGURID.E. 



CANCELLUS M. Edw. 

 Aun. Sci. Nat., Zool., 2" Ser., VI. 2C2, 286, 1836. 



Cancellus tanneri Fax. 



Plalc XL, Fiy. 1-1''. 



Bull. Mus. Conip. Zool., XXIV. 107, 1893. 



The anterior part of the carapace, in front of the cervical suture, is 

 calcified, about as broad as long ; the anterior margin is produced to form 

 a rudimentary triangular rostrum between the eye-stalks, and concave on 

 each side of the median line ; the antero-lateral angles project forward as far 

 as the rostrum and are broadly rounded ; the infero-lateral margin is densely 



