102 CKAllS OF FAMILY MAIID.F. K'ATHIU'N. 



Mithrax suborbicularis Stiinpson. ' 

 I'hit." Mil, Fiij. 2. 



Proc. Aoad. Nat. Sci. I'liila., i\. ]). IMS. IS.M. 



This siUH'ii'S bi'loiiii's to tlio division ^fifhn(.v fr<()isi'ers<()(.v of IVFiliie 

 Edwards. The t'olh)winii' description is taken from a steriU' female, Iho 

 only specimen found: Caiai)ax ronnded, not narrowed anteriorly; 

 length and breadth eqnal; mariiins dentated witli teeth of moderate 

 size. Gastric rej^ion broad and convex. I'pper snrface with abont 

 tliirty small, nearly equidistant, prominent warts, the interspaces gran- 

 ulated, nostrum formed of two small, sharp, triangular, diverging 

 horns, outside of which on either side project three slender si)ines be- 

 longing to the anterior nnirgin of the basal joint of the autenua\ Eyes 

 large. Superior margin of orbit with two deep fissures, and three 

 teeth, the middle one of which is short, truncate, with a trilid dove-like 

 apex. The tooth at the external angle of the orbit is rather long and 

 sharp, curving forward; immediately behind this there are two teeth on 

 the anterolateral margin just in front of the hepatic constriction. Be- 

 hind this ctmstriction on the lateral margin of the carai)ax there are 

 six teeth, the posterior t>nes very small, and placed rather above than 

 on the margin. At the posterior extremity of the shell there are two 

 small, ))lunt snbmarginal teeth. Outer ptcrygostomian regions with 

 granulateil surface upon which arise a few tubercles, llectognathopoda 

 and the adjoining triangular surface smooth and ungranulated. Fossjie 

 of the inner antenna' excavated in the inferior side of the horns of the 

 rostrum. C'helopoda small, slender, smooth, and glossy. Ambulatory 

 feet hairy above; three of the joints spinulose; below smooth. Those 

 of the pi)sterior pair nearly sn\ooth above. 



The coloi' in the prest>rved specimen is white, tinged with reddish 

 brown. Dimensions: Length of carapax. O.S; greatest breadth, the 

 same; breadth between tips of the hirger spines of the antenme, 0.4; 

 betwi'cn tii)s oi' the spines at outer angle of orbit, 0.57 inch. 



It was taken at Selio Island, Gaspar Straits, by]\[r. L. M. Squires of 

 the steamer riolni IliUHocl-. 



Eurynonie longimana Stiuipsoii, 

 IMato viu. Fig. 1. 



Proo. Ai-atl. Nat. Sci. Fhila.. i\, p. L'Jl). 1857. 



Garapax with the regions distinct but lutt deeply separated; propor- 

 tion of breadth to length. 1 : l..">8. Tpper surface rugose, the rugosities 

 consisting of rounded, tiaftened warts, somewhat irri'gular in size, and 

 sometimes continent. A large triangular tootli bcliind the (ubit at the 

 hepatic region : live teeth on the branchial region, four of which are 



*C!lclomai(i xithorhiiiihtrLs Stiiiipsoii. Amor. Jour. Sci.. xxix. p. loo. 1860. 

 CjirUu- (Ciiihimnitt) xuborh'niilaiis Miois. Jouv. Liuii. Soc. I.oikIoii. xiv, j). (!H0, 

 187!1.— M. .1. K'. 



