90 



BULLETIN 129, UNITED STATES NATIONAL MUSEUM 



Hist. State Univ. Iowa, vol. 4, 1898, p. 253. — A. Milne Edwards and 

 BouviER, Mem. Mus. Comp. Zool., vol. 47, 1923, p. 370, pi. 11, fig. 1. 



Diagnosis. — Eye long, slender. Postocular spine long, directed obli- 

 quely forward. Rostrum short. Legs filiform, varying little in length. 

 Description. — Body ar-ined above with three erect, slender, blunt 

 spines, one gastric, one cardiac, and the other on the first segment 

 of the abdomen; abdominal spine small, cardiac and gastric spines 

 equal and about as long as the distance between 

 the orbital arches ; these last armed with aspinule. 

 Carapace convex anteriorly, flattened posteriorly; 

 surface smooth and glossy, naked, except for a 

 few hairs on the anterior part of the branchial, 

 the sides of the gastric, and the frontal region. 

 Beneath, the subhepatic and pterygostomian 

 regions are armed with spiniform granules. 

 The triangular rostral teeth are widely separated 

 at their tips by a shallow interspace, in which 

 the sharp point of an interantennular tooth is 

 visible in dorsal view. Antennae half as long as 

 carapace. 



Chelipeds in male moderately enlarged, a little 

 Fig. 26.-ARACHNOPSIS fiu- longer than carapace, much curved; edges of 



PES (15199), MAXILUPED, . i . 1 i 1 . ■ r i 



X 22 ischium, merus and basal portion oi propodus, 



and surface of carpus spinulous. Remainder of 

 propodus smooth, upper and lower margins convex; fingers as long 

 as palm, gaping except near tips; the largest prehensile tooth is on 

 imnlovable finger in middle of gape; just distad is an enlarged but 

 still much smaller tooth on dactylus. 



Sternum, abdomen and maxillipeds granulate. 

 Measurements. — Male (18117), length of carapace to extremity of 

 rostral teeth 6.9, width of carapace 5.5 mm., length of ambulatory 

 leg of second pair about 17 mm. 



FlO. 27.— ARACHN0PSI3 FILIPE3, MALE (18117), LEFT CHELA, X 13.33. 



Range. — South and west coasts of Florida; Dominica und Bar- 

 bados. Depth, 15 to 130 fathoms. 



Material examined. — See table, page 91. • ' 



