﻿June, 1856.] elliott society. 37 



3. Cryptopodia occidentalis. Dana. 



Description. — Carapax rectangular behind, with the postero-lateral 

 angles acute, posterior edge nearly straight, transverse, antero-lateral edge 

 arcuate, and denticulate on the sides ; a triangular sharp edged prominence 

 on the medial line behind the middle ; a doubly curving subtuberculate ridge 

 extending to the posterior angles ; a small denticulate ridge extending from 

 near the middle to either side of the base of the beak, the two enclosing a 

 narrow area. 



First pair of feet very long, triangularly prismatic, angles sharp and un- 

 equally subspinulose ; hand as long as the carapax is broad, upper surface 

 plane. Four pairs of posterior feet slightly compressed, third, tourth and 

 fifth segments bialate, tarsus slender, quadralate. 



Color not given. 



Dimensions. — Length 1 inch, breadth inches ; length of hand in. of 

 carpus, 5 lines, of arm 1 inch. 



Inhabits coast of California, near Monterey or Monterey harbour. 



Prof. Dana has also transmitted, at our request, the references to the two 

 following species, with copies of the characters given by the authors, and 

 tracings of the figures which accompanied them. We insert the characters 

 here to render more complete our view of the genus, and we have appended 

 to the synonymes, on page 33, an additional reference for figure of C. for- 

 nicata, furnished by Prof. D. 



4. Cryptopodia dorsalis. 

 Cryptopodia dorsalis, Adams & White, Voyage of Samarang, Crust., p. 30, 



pi. 6, fig. 5. 



Description. — Carapax depressed, large, triangular, slightly elevated in 

 the middle, twice as broad as long, behind somewhat sinuate ; margins with 

 large rounded very distinct crenations; greater part of the back covered with 

 small pustular elevations ; two deep furrows in the posterior part of the cara- 

 pax, placed longitudinally and slightly inclined so as to exhibit the form of 



