REPORT ON THE STOilATOPODA. 63 



except as regards the follomng features. The median spine of the rostrum of Gonodac- 

 tylus glabrous reaches halfway to the tips of the eyes (see fig. 7). The carapace almost 

 completely covers the fifth thoracic somite. The transverse cervical suture crosses the 

 middle line of the carapace close to its posterior edge. The postero-lateral angles of the 

 third and fourth as well as the fifth abdominal somite rectangular. The sixth abdominal 

 somite has no median carina. The marginal carinse of this somite are not swollen, and 

 the intermediate and sul^median carinas are much less swollen than they are in Gonodac- 

 tylus graphurus, especially towards their posterior ends (compare fig. 5 of PI. XIV. with 

 fig. 4). The abdominal somites have no transverse or longitudinal sutures. The telson is 

 nearly (x|t) ^ ^'^^^ ^^ wide, and its various dorsal carinse are all of them more sharply 

 defined than they are in Gonodactylus graphurus, as wiU be seen by comparing fig. 5 with 

 fig. 4, and they are very little or not at all swollen, so that the exposed spaces on the 

 dorsal surface of the telson, between the carinse on the median elevation as weU as 

 those between the carinas on the lateral portions of the telson, are much wider than the 

 carinas themselves. The outlines of the bases of the marginal spines of the telson are 

 nearly straight, and they lack the swelling convex curves of the graceful outline of the 

 telson of Gonodactylus graphurus. The dorsal surface of the basal joint of the uropod 

 has only one acute spine, and the paddle of the exopodite is considerably less than half 

 (^f ) ^^ ^^^o ^^ ^^® second joint, when measured on the dorsal surface. The tip of the 

 second joint of the first antenna is exposed in front of the eye. In all other respects the 

 species conforms to the general description of Gonodactylus graphurus. 



Locality. — The Challenger collection contains one female specimen from Samboangan 

 Reefs. 



Size. — The total length from the tip of the rostrum to the middle point of the 

 posterior edge of the telson is 1xu» inches. 



Colour. — In the alcoholic specimen there is much less pigment than there is in 

 Gonodactylus graphurus, and this is restricted to small sharply-defined symmetrical 

 eye-like black spots, of w^hich there are six in the cardiac area of the carapace, two on 

 the sixth, and two on the seventh thoracic somite, four on the eighth, and six on each of 

 the first five abdominal somites. 



Remarks. — This species may be recognised by its very close and striking resemblance 

 to Gonodactylus graphurus, from which it may be distinguished without difficulty by 

 the absence of sutures on the abdominal terga, by the absence of a median dorsal carina 

 on the sixth abdominal somite, as well as by the fact that all the dorsal carinas on this 

 somite and on the telson are more sharply defined and less swoUen and rounded than 

 they are in this species. 



While it is a little closer than Gonodactylus graphurus to Gonodactylus chiragra, 

 there is httle difficulty in distinguishmg it from the latter species by the presence of six 

 well-developed marginal spines upon the telson, and of four carinas upon the central 



