PROCEEDINGS OF THIS NATIONAL MUSEUM. 



521 



specimen is not recorded. According- to Ives (1891) this species should 

 be described under a new name for lie regards 8. prasinoJlneata, Dana, 

 as identical with *S', (lufresnii (Leach) Miers, the lirst name having the 

 priority. He records (1801) a specimencorrespouding to Miers's descrip- 

 tion of aS'. (lufresnii from the coast of Yucatan. 



8QUILLA MANT0ID1:A, Bigelow. 



SquiUa mantoidea, Bigelow, Johns Hopkins I'niv. Circ. lOfi, p. 101, 1893. 



Diagnosis. — Eyes triangular, l)ut with tlie corneal axis at riglit angles 

 to the peduncular one; dactyius of raptorial claw with six teeth, outer 

 margin not sinuate; rostrum sulxpiadiate, cariuate; carapace with tive 

 carina, the median one bifurcated, and witli strong anterior lateral 

 spines; lateral spine of the fifth thoracic segment sliort, straight, acute, 

 and flattened obliquely, lateral processes of tlie next two segments 

 strongly produced and acute; submedian cariniie on thoracic and abdom- 

 inal segments without spines, except the sixth abdominal; telson with 

 a crest and a long ventral keel, twelve or more lines of pits on each 

 side, six marginal spines; denticles 5-G, 11-1:2, and 1. 



General description. — The collection contains but a single vspeciinen of 

 this species, a female from Borneo. Judging only by the published 

 descriptions of 8. mantis one would refer this specimen to that species, 

 but on comparing it with specimens froju the Mediterranean it is seen 

 at once to be sx)eciflcally distinct. 



The body is compact and broad and the carina are all well marked. 

 The greatest width of the abdomen equals the length of the carapace, 

 which makes up nearly one fourth of the 

 total length of the body. The telson is one- 

 sixth of the total length, and its width is 

 14 times its length. The rostrum is four- 

 fifths as wide as it is long; it is broadly 

 rounded in front, witlniearly ])arallel sides, 

 and has well-marked marginal and median 

 carina. 



The carapace is narrowed anteriorly; its 

 smallest diameter being a little more than 

 half the greater, which is a little less than 

 four-sevenths of its length. The five carina 

 and the cervical suture are well marked. 

 The median carina incloses a narrow oval 

 area in its anterior quarter. The lateral 

 carina are continued into prominent spines 

 that are a little way in from the anterior lat- 

 eral angles. The posterior lateral lobes are 



prominent, but are not distinctly angled. The lateral spines of the first 

 exposed thoracic segment (fig. 13) resemble those of 8. mantis, being 

 straight and acute, but they are small and flattened obliquely. The 



-■\ab d 



Fig. 13. 



EXPOSED THORACIC SEOMENTS 

 OF SQUILLA MANTOIDEA. 



