1897.] NATURAL SCIENCES OF PHILADELPHIA. 403 



Synidotea hirtipes (Milne-Edwards). 



Idotea hirtipes Milne-Edwards, Hist. Nat. des Crust., Ill, p. 134, 1S40. 

 Krauss, Die Sudafrikan. Crust., p. 61, 1843. 



Edotia hirtipes Miers, Jour. Linn. Soc. Lond., XVI, p. 68, 1883. 



Miers' description of Milne-Edwards' type is as follows : 

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

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

 ities on the sides of the thoracic segments at some distance from the 

 lateral margins. Head with the anterior margin very slightly ex- 

 cavated, 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-lateral 

 angles ; in none of the segments are these angles prolonged back- 

 ward. Postabdomen short, rounded posteriorly, with a fissure on 

 each side at its base, and with a small and shallow median emargina- 

 tion at its distal end. Eyes large. Antennules reaching nearly to 

 the end of the penultimate joint of the antennse, with their basal 

 joints very small. Terminal joint of the peduncle of the antennse 

 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 (2.5 mm.), breadth nearly tj inch (10 mm.)." 



Localities, Cape of Good Hope (Types) ; Simon's Bay, South 

 Africa, in 4-7 fathoms. 



Synidotea lsevidorsalis (Miers). 



Edotia hirtipes, var. Isevidorsalis Miers, Jour. Linn. Soc. Lond., XVI, p. 69, 

 pi. Ill, figs. 1, 2, 1883. 



Miers says of this species " 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 

 Jeffreys and collected by Capt. H. C. St. John, B,. N., that differ 

 so slightly from I. 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 I. hirtipes that I have seen), and in both is of a 

 decidedly narrower-oval form ; the antero-lateral angles of the head 



