145 



Rostrum 25 mm. j 



„ J measured to back of orbit. 



(-.arapace 1 1,5 mm. ) 



Pleon 35 mm. 



Posterior tooth of rostral crest to back of orbit 2,25 mm. Length of 5"^ pleon somite 

 (lateral) 3,25 mm., (dorsal) 4,25 mm. Length of 6^^ pleon somite (dorsal) 6,5 mm. Height of 

 si.\th .somite anteriorly 3,5 mm. Thickness of sixth somite 2,25 mm. 



In this specimen the left leg of second pair is slightly longer than the right, extending 

 beyond the antennal scale by the chela and four of the joints of the carpus. The right leg 

 extends beyond the scale by about half the length of the chela; it is also a little more slender 

 than the left leg in its terminal segments but neither is nearly so stout as in Spence B.\te's 

 figure. In each leg the chela is not broader, but about I'/^-times as long as the last segment 

 of the carpus. None of the posterior legs are complete in this specimen. 



Another male specimen has carapace 12 mm., rostrum 25,5 mm., posterior tooth to 

 orbital notch 2,5 mm.: chelipeds approximately equal, in length and in stoutness, extending 

 beyond scale by a little more than the chela. 



Another male specimen, carapace 11,5 mm., carpus of fourth leg 15 mm., propodus 

 14,5, dactylus i. This was the only complete leg of the last three pairs that I could find in 

 the bottle ! 



In all the specimens the rostral teeth are fi.xed, except for the last two or three (on 

 the carapace) which are indistinctly separated by articulation". 



In the second specimen (carapace 12 mm.) the legs of the 2"'' pair are described by 

 Dr. C.\LM.\N as equal and extending beyond the scale by a little more than the chela, just as 

 in the ova-bearing female from Stat. 251. The slight inequality of the 2""^ legs in the .first 

 specimen may therefore, no doubt, be considered as an individual variation. 



Doflein's description of P/esionika spinipes Bate var. grandis accords perfectly well with 

 the specimens from Stat. 251, but measurements of the 5''^ and 6'*' abdominal somite like also 

 of the legs, which are so characteristic of the species of Pandalidae, were not given and in 

 the photographed figures on Plate III the legs are quite indistinct. Upon my request Professor 

 ZiMMER of the Zoological Institute of Munich has been so kind to send me some type-specimens 

 of this variety collected partly near Misaki, partly near Fukuura, Sagami Bay. Unfortunately 

 in most specimens, especially those from Fukuura, the rostrum is broken off and the legs badly 

 damaged, but in the five females from Misaki, four of which are ova-bearing, all the legs are 

 well-preserved and their measurements are mentioned in the Table. A close examination of 

 these specimens and of their measurements proved at once that they fully resemble those from 

 Stat. 251, except only in one particular, namely that in the Japanese specimens the dactyli of 

 the three posterior legs are a little longer in proportion to the propodi. The difference is, 

 however, very slight and the examination of a larger number of Indian specimens of the same 

 size as those from Misaki will probably show that such a difference does not exist. In the Japanese 

 specimens the i*' tooth of the rostrum stands just as near the orbital margin as in those from 

 Stat. 251 and usually six teeth stand on the carapace, in N" 8 of the Table, however, five. 



SIBOGA-EXI'EDITIE XXXIXa'. '9 



