LEPTOSTRACA, SCHIZOPODA AND STOMATOPODA. 169 



segment and two on the telson. Those on the sixth abdominal segment are always 

 placed between the intermediate and lateral carinas, and those on the telson occupy a 

 corresponding situation. The constancy of the association of these pigment spots 

 with a uniform green colour in the specimens of G. glabrous in this collection was, 

 indeed, striking. One or two specimens, however, appear to have been a more 

 mottled colour, with a distribution of dark pigment corresponding more or less with 

 that noted by Brooks for his single type specimen. In these examples the four 

 prominent pigment spots noted above were not present. 



The single abnormal specimen to which reference has already been made was a 

 female, 24 millims. long, taken at Trincomalee. It agreed almost exactly with 

 Lanohester's var. segregatun (b) = var. affinis, de Man. I prefer, however, to 

 regard it as an abnormal G. glabrous, having the anterior portion of the intermediate 

 carina? obsolete. 



Distribution : This species has a generally wide distribution throughout the Indian 

 and Pacific Oceans. 



Gonodactylus, sp. 



Localities : 



10 miles north of Cheval Paar, 7f to 9 fathoms. One, 11 millims. 



Mudalaikuli Paar. One, 8 millims. 



These two specimens, apparently belonging to the same species, are still post- 

 larval in development. They probably belong to either Goyiodactylus glabrous or 

 G. chiragra. The telson agrees fairly well with that figured by Brooks (1886, 

 plate xvi., fig. 5) from a specimen which he attributes to some species of Gonodactylus. 

 The dactylus of the raptorial claw in both specimens has a notch on the external 

 margin near to the proximal end. 



Gonodactylus herdmani, n. sp. Plate I., figs. 8 to 10. 



Locality : Coral Reefs, Gulf of Manaar. Two females, 28 and 26 millims. 



The rostrum (fig. 8) is of the Protosquilla type, with acutely produced median and 

 antero-lateral spines. The median spine extends for rather more than half way along 

 the eye. The antero-lateral spines are not so much produced. 



The carapace is rectangular in shape, and of about equal width throughout. Its 

 antero-lateral and posterolateral angles are both evenly and broadly rounded. 



The last three thoracic segments have their lateral parts rounded. 



The first five abdominal segments are quite smooth all over, without carinas or 

 furrows of any kind, and with then* postero-lateral angles rounded. 



The sixth abdominal segment (fig. 9) bears on its dorsal surface four equidistant, 

 perfectly smooth, narrowly oval, blunt carinas. The central two of these carinse are 

 slight lv posterior to the lateral ones. None of the carinas end in spines. There is 

 also a prominent, rather sharp carina on each side of this segment, quite near to the 

 lateral margins and running into the postero-lateral angles, 



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