NORTH SIDE OF THE BAY OF BISCAY IN AUGUST, 1906, -417 



The specimens are all very young, but in my opinion they can be 

 referred with safety to this species. Hitherto P. holsatus has not 

 been recorded from depths exceeding 70 fathoms. 



Portunus pusillus. Leach. 



Station V. 109 fathoms. Eighteen, 5-9 mm. 



It is with some doubt that these small specimens are referred to 

 F. pusillus. The median frontal tooth is, in several instances, not 

 more advanced than the lateral, but it is probable that with growth 

 this feature would become more apparent. 



Portunus tuberculatus, Koux. 



Station III. 75 fathoms. Two, 27 and 29 mm. 

 „ V. 109 fatlioms. Three, 17-21 mm. 



„ VI. 87 fathoms. Three, 21-22 mm. 



Polybius Henslowi, Leach. 

 Station II. 75 fathoms. One, 36 mm. 



Bathynectes superba (Costa). 



Station VII. 444 fathoms. Two; one 11 mm., one broken. 

 ,, IX. 240 fathoms. Seven, about 5-5 mm. 



„ XII. 246 fathoms. Fifty-three ; one large and very macerated, 



the rest 5-6 mm. 

 ,, XIII. 412 fathoms. Four. 



In the small specimens the form of the carapace resembles Bouvier's 

 figure * of an individual 4'5 mm. in length ; the frontal margin is four- 

 lobed, the second and fourth antero-lateral spines are extremely short, 

 while the fifth is not specially longer than the third. In the two 

 large specimens from Station XIII the hindmost spines of the antero- 

 lateral series are very long ; they measure 50 and 46 mm. in breadth 

 without these spines, while, including them, they measure 84 and 

 80 mm. 



Geryon sp. ? 



Station XII. 246 fathoms. One, broken, 5 mm. 



Atelecyclid.e. 

 Atelecyclus septemdentatus (Montagu). 

 Station II. 75 fathoms. Two, 15 and 17 mm. 



* Boiivier, He's. Camp. Sci. Monaco, XIII, 1899, PI. II, lig. 1. 



