PONTOPHILUS OCCIDENTALIS. 131 



of carapace, including rostrum, 30 mm. ; length of rostrum, 12 mm. ; length 

 of telson, 16 mm. 



Station 3424. 676 fathoms. 2 males, 3 fem. (1 ovig.). 

 " 3425. 680 " 1 male. 



The males (all of which are much smaller than the females) differ from 

 the other sex in having the various spines longer, the abdommal pleurae 

 narrower and produced to longer spinous points. 



The egg measures 1.5 X 1-3 mm. 



The number and arrangement of the gills are the same as in the t^ype 

 species of the genus, P. cchinata Dana, as shown by the following formula : 



X. 



1 

 

 

 



5 + (2) 



Paracmngon hystrix A. M. Edw.* is not a Paracrangon. The second pair of 

 legs (which are non-chelate) are not completely suppressed, and there are 

 two arthrobranchiae on each side of the ninth (third maxillipedal) somite. 

 Although differing much in aspect from the typical species of Sabinea, it 

 agrees in the essential structural features, and is correctly referred to that 

 genus by Professor S. I. Smith. It is identical with the species afterward 

 described by Smith under the name of Sahinca princepsA 



Paracrangon echinata Dana, the only other species of Paracrangon known, 

 has been found at Vancouver's Island, Puget's Sound, California, and Japan. 



PONTOPHILUS Leach. 



Malacostr. Podophthal. Brit., Plate XXXVII. A., 1816 (?). 



Pontophilus occidentalis Fax. 

 Plate D., Fig. 2-2". 



Bull. Mus. Comp. Zool., XXIV. 200, 1893. 



Closely allied to P. ahjssi Smith, and P. laid Fax.:}: From the former it 

 differs in having a shorter rostrum, larger eyes, and more strongly developed 



* Ann. Sci. Nat., Zool., B*""' Ser., Vol. XL, No. 4, p. 6, 1881. 

 t Bull. Mus. Comp. Zool., X. 38, 1882. 



X Pontophilus batei Tax., Bull. Mus. Comp. Zool., XXIV. 200, 1893, = Pontophilus gracilis Bate 

 {nom. prtEoc). Ortmann (Decapoden u. Schiiopoden der Plankton-Expedition, p. 49, 1893) also bas pro- 



