I07 



than between this rid;4e and the lateral borders. The fingers, wliich are somewhat shorter than 

 the pahn, shut close together and their pointed tips are crossing one another; both fingers are 

 somewhat flattened and gradually narrow towards the tip. The immobile finger is armed with 

 a larger, subacute, compressed tooth, situated a little nearer to the articulation than to the tip 

 oi the finger and furthermore along its whole length to near the extremity with numerous 

 much smaller teeth of different size, larger teeth alternating with smaller ones ; similar small 

 teeth of different size occur also along the whole length of the dactylus, but 5 or 6 pro.ximal 

 ones are larger than the rest. In the male of A^ephr. Thovisotii there is a spine near the centre 

 of the inner margin of the palm, but in Nephr. Sibogae, like also in the female of N^cphr. 

 Challaigcri^ this spine is wanting. The i*' pair of legs of younger male specimens agree with 

 those of the adult male just described, but the granulation is less consjjicuous. In a young 

 male, long 116 mm., the carpus of the right cheliped carries a spine at the proximal third 

 of its inner margin, an abnormality indeed. 



Of the female the P' pair of legs agree with those of the male. In the largest female, 

 that measures 178 mm., the left leg is 166 mm. long, almost as long as the body, the right 

 is somewhat shorter; the chela measures 94 mm., the palm is 50 mm. long and 13 mm. broad 

 at the articulation of the fingers. In another female, also without eggs and measuring 165 mm., 

 the carapace is 49 mm. long without the rostrum and 77 mm., w^hen it is included: in this 

 s|)ecimen the i"' pair of legs are considerably smaller than in the female long 178 mm., the 

 right leg measuring 122 mm., the other 111 mm. In this specimen, like in the young male, 

 long 116 mm., the carpus of both legs is armed with a sharp tooth at the proximal third of 

 its inner margin and the carpus ot the left leg carries 2 spines instead of one, as usually, 

 near the proximal end of the outer margin. In the two egg-laden females, tlnally, which are 

 I3t mm. and 128 mm. long, the accidental spine on the inner margin of the carpus occurs 

 on the right leg, but not on the left. In the female of Nephrops Challaigcri (C. Spence Bate, 

 I.e., p. 191, PI. XX\', fig. 2) "a small sharp tooth is present at the external base of the 

 dactylos", this tooth now is wanting in Xcp/ir. Sidogac, both in the male and in the female. 

 In the adult male, long 184 mm., a small sharp tooth is observed at the base of the dactylus, 

 not externally, but both on its up])er and on its lower side; immediately behind these teeth another 

 similar tooth occurs on the distal end of the palm. When the dactylus is now looked at from 

 the inner side, one ob.servcs therefore, at each side of the articulation, two small sharp teeth 

 which are directed forward; in younger specimens these teeth are rudimentary or wanting at all. 



The other legs a]>i)arently agree with those of Xcplir. Thonisoiti. In the adult male 

 the 2"'* pair extends as far forward as the carpus of the i"', the 4"'' ])air reaches nearly as 

 far, but the legs of the 3"' pair are distinctl}' shorter and those of the 5''' attain only the distal 

 extremity of the merus. 



The globular eggs show a diameter of 2 — 2,1 mm. 



3. Nephrops arafnrcitsis de Man. (Plate III, Fig. 16, i6<7). 



Nephrops arafiircnsis J. G. de Man, in: Tijdschr. d. Ned. Dierk. Vereen. (2) Dl. IX, .\\\. j, 

 1905, p. 587. 



