142 THE VOYAGE OF H.M.S. CHALLENGER. 



A male and two females, one of the latter with similar parasites to those occurring on 

 Galathea pusilla, Henderson. 



Munida sancti-pauli, Henderson (PI. UI. fig. 6). 



Munida sancti-pauli, Henderson, Ann. and Mag. Nat. Hist., ser. 5, vol. xvi. jx 411, 1885. 



Characters. — The rostrum is about half the length of the carapace, and more than 

 twice the length of the supraorbitals, which are slightly upturned and situated close 

 together. The carapace is glabrous, and the striae comparatively few in number, though 

 fringed with short hairs ; the gastric area exhibits but little convexity, and is armed 

 with a transverse row of from six to eight spinules placed parallel to the frontal margin, 

 of which the second on either side (counting from the middle line) slightly exceeds the 

 others in size ; the cardiac area is unarmed and scarcely defined ; three small spinules 

 occur on the branchial area, two of these being situated on the portion immediately 

 posterior to the anterior division of the cervical groove. The lateral margin of the 

 carapace is armed with seven comparatively large spines, of which the two in front of 

 the cervical groove are specially prominent ; the posterior margin is unarmed. 



The chelipedes are of moderate size, with the joints strongly spinose, the spines being 

 most strongly developed on the merus ; the propodus is somewhat narrower than the 

 carpus, and its upper surface carries a median and two lateral rows of short curved 

 spines ; the fingers are about equal in length to the palm and in contact throughout, 

 while two or three short spines are present on the outer border of the immobile finger. 

 The ambulatory limbs are of moderate length ; the upper surface of the meral, carpal, and 

 propodal joints is faintly granular, while the two former have a series of well-marked 

 spines on their anterior and posterior margins, those at the distal end of the merus 

 exceeding any of the others in size ; the dactyli are curved only towards the apex, and a 

 few horny spinules are present on their posterior margin. 



The eyes are of comparatively large size, and but slightly flattened, with the cornese 

 deeply pigmented. The anterior prolongation of the first antennal peduncular joint is 

 short, not exceeding the second joint. The ischium and merus of the external maxilli- 

 pedes are almost smooth externally ; the inner margin of the latter gives rise to two pro- 

 minent spines, the larger of which is situated near the middle of the joint, and the other, 

 which is slightly less pronounced, at the distal end, while a minute spine is placed opposite 

 the last on the outer margin. 



The second abdominal segment bears from eight to ten minute spinules on the anterior 

 margin ; the remaining segments are glabrous, and the strije almost obsolete. 



Breadth of carapace (of a female with ova) 8 '8 mm., length of body 22*5 mm., of 

 carapace 10 mm., of rostrum 5"8 mm., of chelipede 28 mm., of chela 12 mm. 



This species is nearly related to Munida miles, A. Milne-Edwards, and it is not 



