46 



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Palinurus vulgaris. 



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Four teeth ; that nearest the tip much longer 

 and sharper than others. 



•41 in specimen 4 inches long. 

 •36 in specimen 7 inches long. 

 •33 in large adult. 



Except for a distal tooth, inner keel is quite 

 smooth. 



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Distal end of upper keel bears a row of 

 prominent spines. 



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B. 



Palinurus Gilchristi. 



As in ^, except that the spines are not so 

 large or so uniformly arranged. 



A transverse furrow as in A, broken by a 

 narrow carina. In addition to this there is 

 another unbroken transverse furrow on the 

 anterior part of the tergum. 



Three or four teeth, of which that nearest 

 the tip is the largest. 



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Upper and outer keels quite smooth, but with 

 spine at extreme tip of each as in ^. 





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Blunter and shorter than in A. No spine on 

 second segment. 



A. 

 Palinurus Thomsoni. 



On the middle of the carapace there are two 

 rows of large spines, parallel in front of 

 cervical groove, slightly converging behind 

 it. The spines are largest in front and 

 diminish posteriorly. 



A transverse furrow fringed with hairs on the 

 second to fifth abdominal terga. Each 

 furrow is broken by a low broad median 

 carina. 



On front margin of supra-orbital spines there 

 are four uniform teeth. 



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. Merus of first pereiopods has four small teeth 

 on proximal part of inner keel, and a large 

 distal spine. 



Upper and outer keels of merus, smooth, ex- 

 cept for very faint granulation on upper keel 

 at distal end. Spine at end of each keel. 



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Pleura long and sharp ; those of the second 

 segment have a spine on the anterior edge. 



