170 Bulletin, Vanderhilt Marine Museum, Vol. II 



Portunus holsatus Fabricius. 



Plate 58, fig. A. 



Diagnostic characters : Carapace nearly subeircular ; frontal teeth 

 three, the median slightly the longest ; anterolateral margin with five 

 teeth, including the postorbital ; dorsal surface with weak areolations, 

 smooth, finely pubescent. 



Type: Fabricius stated that his type "inhabits the oceans of 

 Europe" and was deposited in the Mus. Doldorff. 



Distribution : Mediterranean Sea, northward to the southern coasts 

 of England and southward to the northern and northwestern coasts 

 of Africa. 



Material examined : Three males and two small females dredged in 

 11 fathoms, Casa Blanca, Morocco, August 20, 1924, by the ''Ara," 

 William K. Vanderbilt, commanding. 



Color : In life the upper surface of this crab is a mottled grayish- 

 green with a yellowish tint, the claw and legs are etched with reddish- 

 orange. 



Technical description : Carapace oval, almost subeircular, convex, 

 31.5 mm. long, 40 mm. wide from tip to tip of lateral spine, interor- 

 bital margin 10 mm. wide ; frontal teeth three in addition to the pre- 

 orbital teeth ; the medium tooth is triangular, a trifle longer than the 

 lateral teeth, which are also triangular and from which it is separated 

 by a wide, shallow, U-shaped sinus ; the sinus between the lateral and 

 preorbital teeth is shallower than that between the median and lateral 

 tooth ; the preorbital tooth is weak, the margin sinuate ; the superior 

 orbital margin has two closed sinuses; the postorbital tooth is acute, 

 its posterior lateral margin long ; there are four teeth on the antero- 

 lateral margin besides the postorbital ; of these, the postorbital, second 

 and third teeth are subequal, the tips are acute, the anterolateral mar- 

 gin short, the posterior lateral margin long ; the fourth tooth has this 

 posterior lateral margin longer than do the others ; the fifth or lateral 

 tooth has the tip more acute and upward and outward directed; the 

 posterior margin is confluent with the carinate concave postlateral 

 margins. The upper surface is smooth and finely pubescent. The 

 areolations are weak, except the depressions on either side of the uro- 

 gastric region and a slight pit anterior to each of these. The male 

 abdominal belt is triangular; five-segmented, the first segment very 



