OXYSTOMATOUS AND ALLIED CRABS OF AMERICA 121 



CLYTHROCERUS STIMPSONI, new species 



Figure 32; Plate 34, Figures 5, 6 



Type locality.— West coast of Florida; 100 fathoms; April 22, 1872, 

 William Stimpson, Bache; 1 female holotype (M. C. Z. no. 8261). 



Diagnosis.— CuTupsLce a tbird wdder than long. Two lateral teeth 

 (paired) at widest part of carapace. A tubercle behind orbit. 



Description.— CiiTSipa,ce convex; anterior teeth separated by a 

 depression from remainder of carapace. Sm-face finely granulate, a 

 few larger granules in advance. Mesogastric region defined; proto- 

 gastric with two impressed lines directed backward and slightly 

 inward, enclosing a narrow strip. Lateral margin, including the 



Figure 32.—Cluthrocerus stiiupsoui, female holotype (M. C. Z. no. 8261): Outline of carapace, XIO. 



teeth, bordered by minute spinules; above and between the teeth a 

 small spine forming a right angle with them. Median rostral tooth 

 triangular, blunt, more advanced than inner orbital teeth; the latter 

 are tipped with a smaller slender spine; superior orbital sinus trian- 

 gulate; outer orbital teeth directed obliquely outward, their anterior 

 margin convex; lower margin prominent, transverse, with a spinule 

 at its middle. Abdomen of female very broad, a low median tubercle 

 on segments 2, 3, 4, and 5; a short spinule on either side of third 

 segment. Maxillipeds very prominent, with raised margins; an 

 oblique spinuliferous ridge at middle of merus, in front of it a longi- 

 tudinal furrow, continued on merus; exognath with arcuate, raised 

 outer margin; all ridges more or less spinulous. A pterygostomian 

 ridge runs from just behind tip of exognath backward to a point 

 opposite the first lateral tooth of carapace; it is armed with about 10 

 spinides. 



Measurements.— YQTCislQ holotype, length of carapace to tip of 

 spine 3.2, uddth 4.3 mm. 



Range.— Ivnown only from the type specimen. 



Family LEUCOSIIDAE Dana 



Leucosidae Dana, United States Exploring Expedition, Crustacea, pt, 1, p. 390, 

 1852; pt. 2, p. 1427, 1853. 



Leucosiidae Miehs, Voyage of H. M. S. Challenger, Brachyura, vol. 17, p. 297, 

 1886. — Alcock, Journ. Asiatic Soc. Bengal, vol. 65, p. 164, 1896. — Ihle^ 

 Die Decapoda Brachyura der Siboga Expedition, Monogr. 39b*, p. 186, 1918. 



