24 



CRUSTACEA MALACOSTRACA. 



In a second female the cephalothorax with rostrum is 48-8 mm., the V- right leg below 69 mm., 

 the 2"^ right leg below 106 mm. 



15. Paralotnis Bouvieri n. sp. 



PI. II, figs. 2 a— 2 f. 



Occurrence. The "Ingolf has taken this interesting form at 2 localities. 



Between South Greenland and Iceland : vSt. 96: 65° 24' N. L., 29"" 00' W. L., 735 fm., temp. 1-2'" ; i spec. (cf). 



South of Iceland: St. 53: 63" 15' N. L., I5°07'W. L., 795 fm., temp. 3-1^; i spec. (5). 



Description. One of the two specimens is a good-sized female with eggs, the other a some- 

 what small male. To judge from the general body-form, spine-equipment of cephalothorax, form and 

 armature of rostrum, length and spination of the legs etc. it is quite certain that the two specimens 

 belong to the same species, but they differ greatly nevertheless in the spination of the antennal squama, 

 in the spiny equipment of the abdomen and above all in that the marginal plates on the 3'^'^ abdominal 

 segment are quite free in the male, but quite fused with the lateral plates in the female. As this 

 feature in the marginal plates of the third segment is generally considered an important generic 

 character, the male should be referred to Acantholitlius Stimiss., the female to Paralomis ; I have pre- 

 ferred to place the species with the latter as it shows some resemblance to P. aculcahis Hend. 



The carapace, excluding the rostrum, is but little longer than broad; the posterior margin in 

 the female is obviously incised in the centre, in the male only slightly, and on each lateral margin 

 there is a conspicuous curve at a distance of a little more than one-third of its length from the fore 

 corner. The upper surface in the female is densely covered with spines, nian\- of which are long, some 

 moderate and some fairly short, but most of them are slender and end with a little tuft of bristles; 

 in the male the spines are even slighth' more numerous and the longest relatively longer than in the 

 female, while the short are relatively shorter and less slender than in the latter. The rostrum (fig. 2b) 

 is short and ends with the ordinary three processes which have a small number of extremely small 

 tubercles; there is no projection or spine on the under side, but on the upper side close behind the 

 distal processes the rostrum has two fairly long, slender spines. The gastric area is somewhat highly 

 arched; the cervical furrow is deep and very sharply marked between the gastric and the cardiac 

 areas, but opposite the anterior corners of the latter it has really disappeared. 



The e)e-stalks (fig. 2b) are apposed at the base; each has a pair of spines and some granulations 

 on the upper surface, as also a fairly long, slender spine from the distal end over the black eye. The 

 stalk of the antennje is almost as in the previous species, but the spiny equipment of the outer margin 

 is more developed; the outer, anterior corner of the first joint bears a spine in the female but none 

 in the male; in both specimens a moderate spine springs from the base of the terminal long process, 

 and behind this there is in the female another very short spine. As mentioned the squama is very 

 different in the two specimens; in the female (fig. 2c) it may be said to be short, fairly thick, ending 

 with two spines, the outer of which is long and the inner very long; behind the inner above there is a 

 fairly long spine and behind this again on the left squama a pointed tubercle. In the male the squama 

 may be described as thorn-like, on the inner side of the right squama (fig. 2d) there is a moderately 



