224 T - V ' HoDGSON > 224 



The first Joint is small and stout, the two following are much longer, the third being a little shorter 

 than the second and having the perfectly normal oblique termination, the fourth is longer still, and the fifth 

 even longer and is also slightly curved. The following joints are very small, and progressively decreasing 

 in size to the last, which is minute, all together scarcely equalling the length of the fifth Joint. The fifth 

 Joint carries a stout spine which is not denticulate. The three terminals bear 2, 1, 2 denticulate spines. 

 They consist of a rather long tapering shaft with a flattened blade furnished with 9 lateral and close 

 set teeth. 



In another specimen, which is perhaps scarcely mature the joints of this appendage differ a little in 

 their proportions. The five terminals are together much longer than the fifth Joint, the first two are the 

 longest and subequal, the next is shorter, the fourth intermediate in size and the terminal one is a mere 

 button. Each of the five carry two denticulate spines. In this specimen the spines are much better pre- 

 served and have about a dozen lateral teeth. 



The legs are short and attain a length of 6 mm. Of the three coxae the second is distinctly the 

 longest about as long as the other two together, it is much enlarged distally. The first coxa carries dorsally 

 and distally, a stout tubercle. The next three joints are subequal. The first tibia is slightly constricted a 

 short distance from its proximal end. The tarsus is very small, its ventral surface being covered with stift 

 setae, which, though still small, become distinctly spinous distally. The propodus is large and measures 

 two thirds the length of the first tibia, it is curved and bears small but stout setae dorsally, ventrally at 

 the proximal end of the Joint there are four stout spines graduating in size and strength from 1 to 4, more 

 distally is a band of stout spinous setae of which most distal are the strongest. The terminal claw is 

 large and powerful and is accompanied by two strong auxiliaries more than half its size. The heel is not 

 very prominent but is provided with stout setae. 



The entire limb is setose, these are for the most part minute but they are larger dorsally on the 

 principal joints and, as is not unusual, they are most abundant on the second tibia. 



The type specimen which has been killed with osmic acid is an adult male, and bears the genital 

 apertures on distinct setose swellings at the ventral extremity of the second coxa of the two posterior 

 pairs of legs. 



Another specimen is not quite mature and differs in having but three stout spines ventrally on the 

 propodus. The palps are not so strongly developed nor is the proboscis either so long or so slender. 



Two other specimens taken at the same time and place are in all probability the young of this species. 



One, the larger of the two, has not yet passed the chelate stage. The other is in a post-larval 

 condition. The proboscis is not large, ventrally situated and the cheliferi are short and stout, the chela 

 being directed downwards. The posterior portion of the body is saccate and within this may be seen two 

 lobes which represent the hind pair of legs and the abdomen. The extremity of this latter organ is cleft 

 and projects very slightly from the investing sac. 



For the following species I have seen fit to establish a new genus Heteropallene. Modern genera are 

 now defined by a number of small characters which, while facilitating their division into small groups, do 

 not render their prompt discrimination less perplexing. 



The Pallenidae as defined by Prof. G. O. Sars (6) comprise those Pycnogonids in which: 



the cheliferi are well developed; 



the palps are rudimentary or absent; 



the ovigers present in both sexes. 



