154 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



EXOCORALLANA WARMINGII (Hansen). 



Corallana inirtnliujii Hansen, Vidensk. Selak. Skr. (6), V, 1890, pp. 387-388, 

 pi. VII, tigs. 7-7f.— Richardson, Proc. U. S. Nat. Mus., XXIII, 1901, p. 519. 



Localities. — Off Cape Catoche, Yucatan; latitude 17° 47' south, longi- 

 tude 36" 17' west. 



Depth.— ^-^ fathoms. 



Body oblong-ovate, three times longer than wide, 3 mm. :9 mm. 

 Head wider than long, 1 mm.: 2 mm., with the anterior margin widely 

 rounded. Eyes large, composite, contiguous, and occupying the 

 greater part of the dorsal surface of the head. The first pair of 

 antenni\? have the first two articles confluent and scarceh' to be dis- 

 tinguished from each other; they are subequal in length; the third 

 article is equal to the second in length. The flagellum is composed of 

 nine articles. The first antennte extend almost to the middle of the 

 fifth peduncular article of the second antennn?. The first two articles 

 of the second pair of antenna? are short, the second one being a little 

 shorter than the first; the third article is about equal to the first two 

 taken together; the fourth and fifth are subequal and each is twice as 

 long as the third. The flagellum is composed of twentj^-five articles. 

 The second antenna? extend almost to the posterior margin of the third 

 thoracic segment. The maxilliped is composed of seven articles. The 

 mandible has a palp of three articles. The frontal lamina is narrow 

 and has the anterior margin roiuided. 



The first segment of the thorax is twice as long as an}-^ of the four 

 following segments; the sixth and seventh segments are shorter than 

 the fifth, the seventh being very short. The epimera of all the seg- 

 ments, with the exception of the first, are distinct, the last four being- 

 crossed obliquely by an arched carina. The outer post-lateral angles 

 of the first two are rounded, those of the last two acutely produced 

 beyond the posterior margin of the segments. 



The first segment of the abdomen is entirely concealed by the last 

 thoracic segment. The posterior margin of the four following seg- 



segmenta posteriora stria in mare bene distincta, in femina a setis plus minusve 

 abscondita. 



Epimera et pedes fere ut in Cor. antillensi. 



Segmenta 5 anteriora fere ut in C. antillensi sculpta. 



Segmentum ultimum eaud^e fere ut in C. antillensi, excavatione media basali brevi- 

 ore, nodis lateralibus magnis angu«tioribus, apice 5 spinoso imprimis ab ea specie 

 discrepans. 



Uropoda caudam nonnihil superantia; ramus interior ramum exteriorem paulum 

 superans, fere dui)lo longior quam latior, raargine postero-interiore sat excurvato, sat 

 spinoso, longe ciliato, apice paulum producto, acuto. Scapus angulo interiore partem 

 tertiam basalem rami interioris nonnihil superante. 



Color Havo-brunneseens. Apj)endix masculina fere ut in (-'. tricorm. — Hansen, 

 Vidensk. Selsk. Skr. (6), V, 1890, pp. 386-387. 



