LEPTOLITHODES LONGIPES. 49 



perior ; the latter are not so long as the inferior spine ; there is, besides, 

 a spinule on the lower side of the inferior spine, and a still smaller one 

 above, between the roots of the superior pair. There are two pairs of 

 long spines on the anterior margin of the carapace, one at the external 

 orbital angles, the other at the antero-lateral angles of the carapace. There 

 are also three or four prominent spines on the side of each branchial area. 



Eye-stalks spinulose al)ove. Basal segment of the antenna armed with 

 an external spine, the second segment with several spines, the most promi- 

 nent of which is on the outer side ; acicle furnished with five prongs or 

 spines, the largest median, the others lateral ; flagellum much longer than the 

 carapace. Cheliped of moderate size (the right one is lost from the only male 

 specimen secured), coxa tuberculate on the lower face, the following seg- 

 ments armed with strong spines, lingers excavated within, slightly gaping, 

 penicillate, cutting edges entire. Ambulatory appendages very long, second 

 and third pairs of about equal length and longer than the first pair ; all of 

 them armed, like the chelipeds, with spines ; the spines tend toward a regu- 

 lar arrangement in longitudinal rows, and the spaces between the spines are 

 smooth and naked, i. e. nearly free from spinules, tubercles, and setoe. 



Second segment of the abdomen composed of a single calcified plate, 

 marked by a deep hollow on each side of the middle. The other segments 

 of the abdomen are of a leathery, semi-membranaceous consistency, and are 

 made up of five longitudinal rows of plates ; viz., one median row, flanked 

 by a row on each side, the latter in turn bounded externally by a marginal 

 series. The whole surface of the abdomen is verrucose. 



Length of carapace, including rostrum, 84 mm. ; greatest breadth of cara- 

 pace, 78 mm. ; breadth between the antero-lateral angles of carapace, 34 

 mm. ; length of last ambulatory appendages, 242 mm. (merus, 76 mm., 

 carpus, 36 mm., propodite, 64 nun., dactylus, 47 mm.). 



In the female tlie right chela is larger than the left, and the prehensile 

 edges of the fingers are furnished with blunt teeth. The abdomen is unsym- 

 metrical, the apex turned to the right, the marginal plates absent from the 

 left side ; the right side bears but one ovigerous appendage (the first). The 

 abdomen nearly conceals the basal segments of the thoracic legs, which in 

 the male are almost wholly exposed. 



Station 3371. 770 ftithoms. 1 male, 1 fem. ovig. 



The egg measures 2 mm. in diameter. 



In this species the abdominal segments posterior to the second are mem- 



