SICYONIA TRISPINOSA. 143 



margin with 4 or 5 teeth, the l^t tooth above the orbital 

 margin, its tip projecting beyond it and once and a half 

 as far distant from the S^'^ tooth on the carapace as from 

 the tip of the 2^^ rostral tooth ; one tooth at the end of 

 the lower margin. Orbital angle more obtuse than iu Sic. 

 sculpta. 



Abdomen as in this species, the pleura of the 1»' somite 

 presenting two transverse furrows; carina of the 1st tergum 

 terminating in a sharp tooth, that of the 2nd obtuse. 



Antennular peduncle as in Sic. scu/pta, but the spine 

 at the far end of the 1»* joint more slender and the 

 posterior spine farther distant from the outer margin; 

 2nd joint once and a half as long as broad and nearly 

 twice as long as the S^d joint. 



Legs of 1st pair bispinose, fingers longer than the palm, 

 both in this pair and in the 2"^ ; legs of 3''d and 5^^ pair 

 wanting in the two specimens that were collected. 



Petasma symmetrical. Anterior margin with a sharp 

 spine, directed straightly foreward, at either angle; lateral 

 margins slightly diverging from the base to just beyond 

 the middle, ending here in an obtuse tooth ; anteriorly the 

 lateral margins carry two other teeth, the anterior of which 

 is pointed and curved backward, while the other is sharp 

 and directed obliquely foreward. 



Length of male with fully developed petasma 21, 75^™. 



18. Sicyonia benthophila, n. sp. 



Station 253. Lat. 5°48'2 S. ; long. 132°13' E. Depth 

 304 M. 



Carapace, rostrum included, one third the whole length, 

 longer in proportion to its height than in most other 

 species, being once and a half as long as high, the ros- 

 trum excluded. One small tooth on the carapace, just in 

 the middle, behind which the carapace is rounded; another 

 tooth anteriorly, its distance from the anterior margin '/o 

 the length of the carapace. Rostrum quite horizontal, short 



Notes from the Leyden Museum, A^ol, XXIX. 



