476 Mr. R. I. Pocock on Stomatopod Crustaceans 



Two examples ( c? ? ) from the Arafura Sea, both possibly 

 young. 



A number of young examples of chiragra, both surpassing 

 and falling short of these in size, were taken at the same time 

 and in the same locality, and there is no difficulty whatever 

 in distinguishing those that are here named SmithiL 

 Dr. Hansen, however, when naming the Museum collection 

 of Stomatopoda referred an exactly similar form to G. chiragra^ 

 so that it is possible that the view here expressed may be 

 erroneous. 



(8) Gonodactylus excavatus^ Miers. 



A single male example dredged at a depth of 26 fath. on 

 Macclesfield Bank. 



The rediscovery of this species is interesting, the locality 

 of the type being unknown. The figure of tlie telson of this 

 species given on pi. iii. of Mr. Aliers's paper is very inaccu- 

 rate. The excavation is represented as much wider than it 

 really is, and the posterior angles of the telson appear to be 

 single, whereas in reality they are double, consisting of two 

 subequal processes. 



(9) Gonodactylus trispinosus, Dana. 



Two small examples from Baleine Bank (N.W. Australia). 



Under this species, in his revision of theSquillidae, Mr. Miers 

 mentions two males that were obtained at Sharks Bay (W. 

 Australia). According to Dr. Hansen, these examples belong 

 to a different species, namely G. stoliura of F. Miiller. 



(10) Gonodactylus tuherosus, sp. n. (PI. XX. B. fig. 2.) 

 (? Var. of trispinosus.) 



Very closely allied to the preceding, G. trispinosus, the only 

 differences between the two that I have noticed being found 

 in the form of the rostrum and of the telson. In trispinosus 

 the lateral spines of the rostrum are longer, thinner, and are 

 directed forwards and outwards, so that if prolonged in the 

 same direction they would pass along the outer border of the 

 eyes. In tuherosus, on the other hand, the spines are much 

 shorter and stouter, being directed forwards, so that the prolon- 

 gation of their axes would pass through the external half of 

 the eyes. Again the telson of tuberosus is more squared 

 and its posterior angles less rounded ; the prominences, too, 

 are considerably larger, the median being alniost spherical 

 and so high that its summit is on a level with the summits of 

 the median tubercles of the sixth abdominal tergite, although 



