ME. E. J. MIEES ON THE IDOTEIDiE, 69 



In this species the body is somewhat ovate, moderately convex, 

 arcuated on the sides, evenly granulated above, with large in- 

 equalities on the sides of the thoracic segments at some distance 

 from the lateral margins. Head with the anterior margin very 

 slightly excavated, and with a semicircular curved impressed line 

 posterior to its frontal margin, and another, nearly straight line 

 near its posterior margin; its antero-lateral angles prominent 

 and nearly right angles. The first three thoracic segments with 

 an impressed curved line in the middle of the dorsal surface, and 

 rounded at their postero-Iateral angles ; in none of the segments 

 are these angles prolonged backward. Postabdomen short, rounded 

 posteriorly, with a fissure on each side at its base, and with a 

 small and shallow median emargination at its distal end. Eyes 

 large. Antennules reaching nearly to the end of the penultimate 

 joint of the antennae, with their basal joints very small. Terminal 

 joint of the peduncle of the antennae longer than the preceding ; 

 flagellum with about 14-21 joints. Legs long, slender, hairy, 

 and terminating in a long claw. Terminal plates of the opercular 

 valves irregularly four-sided, being much narrowed at the distal 

 end. Length of the largest specimen nearly 1 inch (25 mm.), 

 breadth nearly -^ inch (10 mm.). 



The description (except as regards dimensions) is taken from 

 Milne-Edwards's types. 



There are in the British Museum several dried specimens from 

 Simon's Bay, South Africa, collected on a sandy bottom in 4-7 

 fathoms ; and others, without locality, collected by J. MacGrillivray 

 of H.M.S. ' Eattlesnake.' 



In the Paris collection I have examined, besides four specimens 

 from the Cape of Grood Hope (types of M. -Edwards's descrip- 

 tion), others from the same locality (MM. Quoy and Gaimard), 

 and several Qthers,^.^ain, without particular locality. 



'^^=^ EfifiTXi. HIETIPES, var. L^YIDOESALIS. (Plate III. figs. 1 & 2.) 

 Two males are in the collection of the Museum from Jatiyama 

 Bay, Japan, obtained at a depth of 6i fathoms, lat. 39° 2' N., 

 long. 189° 50' E., presented by Dr. J. Gwyn Jeflreys, and col- 

 lected by Capt. H. C. St. John, E.N., that difi"er so slightly from 

 J. hirtipes that I cannot regard them as specifically distinct. 

 The body is quite smooth in the larger example, and very nearly 

 so in the smaller (which is of larger size than any specimen of 

 the typical 1. hirtipes that I have seen), and in both is of a 



