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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 nngles, the Other at the antero-lateral angles of the carapace. There 

 arc also three or four prominent sphics on the side of each branchial area. 



Eye-stalks spinulosc above. Basal segment of the antenna armed with 

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

 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. Chelipcd 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, fingers excavated within, slightly gapmg, 

 pcnicillate, 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 seta). 



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, scmi-merabranaceous 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 



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series. 



The whole siu-face of the abdomen is verrucose. 



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

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

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

 carpu's 3G mm., propodite, 64 mm., dactylus, 47 mm.). 



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

 cdoes of the fingers are furnished with blunt teeth. The abdon.en is unsym- 

 "trical the apex turned to the right, the marginal plates absent from the 



left side • the right side bears but one ovigerous appendage (the first), 

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

 the male are almost wholly exposed. 



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



The ejrg measures 2 mm. in diameter. 



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



7 



»•- 



