Boone, Crustacea, Cruises of ''Eagle" and "Ara," 1921-28 151 



Type: Herbst's type. was without locality, from the collection of 

 Bar. de Block. Say's type was a comparatively young specimen, 2.3 

 inches wide, without specific locality. He states that ' ' the crabs ap- 

 pear to delight in deep water and are eaten by the black fish and sea 

 bass, being often found entire in their stomachs." 



Distribution : Known from Nova Scotia to New Jersey as an abun- 

 dant species and known more sparsely, usually from deep water, as 

 far south as Beaufort, N. C. 



Material examined: Eight specimens dredged in the upper end 

 of Whitehaven Harbor, Nova Scotia, September, 1926. 



Color : This species is yellowish on the dorsal surface with numer- 

 ous small, purplish spots. The underparts are deep cream color. 



Technical description : Carapace about two-thirds as long as wide, 

 transversely oblong-ovate, with the ninth or lateral tooth sharply 

 angulated ; the frontal border is narrowed, trilobed, the median tooth 

 being smaller and slightly in advance of the broad, rounded, submedian 

 pair of teeth which in turn are separated from the narrower, rounded, 

 preorbital tooth by a V-shaped notch. The superior orbital margin 

 bears two closed sinuses. The inferior inner orbital tooth is prominent 

 and well developed. The anterolateral margin is cut into nine teeth, 

 including the postorbital tooth; the suture line between the teeth is 

 continued for a short distance onto the carapace, thus more sharply 

 defining the teeth and giving the posterior three, which are triangu- 

 late-tipped, a pentagonal effect. The other teeth are rather bluntly 

 truncated. All nine teeth have the margins granulated, not denticu- 

 late as in C. lorealis. The postlateral margins are convergent with 

 the posterior, and all have a sharply defined, granulose carina. The 

 dorsal surface of the carapace is granulose and pitted, moderately 

 convex, with the regions well defined, the urogastric sulcus deep. 



The chelipeds are subequally enlarged in the male, approximately 

 equal in the female ; of moderate size, distinctly shorter than the first 

 pair of ambulatories ; the merus does not extend beyond the carapace ; 

 the carpus is granulated, convex, with several granulose carinae and 

 an acute tooth at the inner lateral angle ; the propodus has the palm 

 slightly longer than the carpus and rather thick, with the inner face 

 smooth and the outer face with four or five granulate carinae, tlie 

 upper most of which is cristate, while two others are continuous onto' 

 the finger. The fingers are approximately as long as the propodus; 

 the upper finger is a bit thicker than the lower and has the tip down- 

 curved ; there are two or three teeth on the cutting edge. 



