502 



PROCEEDINGS OF UNITED STATES NATIONAL MIJS IM. 



conspicuously uor carinated. The fifth perieopods are shorter and 



stouter than in Meningodora and very distinctly subchelate, the stout 



and conspicuous, though short, dactylus closing against a digital process 



of the propodus fully half its own length. 



The dorsum of the pleon is neither carinated nor toothed. The 



pleura of the second somite are not as figured by Buchholz, but overlap 



those of the first and third as in the allied genera, and the pleura of 



the third, fourth, and fifth somites are evenly and similarly rounded 



posteriorly. 



Specimens examined. 



Locality. 



N. lat. 



"W. long. 



Specimens.* 



38 52 40 



38 19 26 



40 26 40 



40 26 40 



29 00 



12 20 



12 20 



22 00 



18 30 



39 

 37 

 37 

 39 

 39 



35 45 23 



39 25 30 

 39 44 30 



69 24 40 



68 20 20 

 67 05 15 



67 05 15 



70 58 40 



69 36 00 



69 36 00 



68 34 30 

 68 24 00 

 74 31 25 



71 44 00 



70 10 30 



Si. 

 <s 



p 



Fath. 



1735 



2369 



959 



959 



1342 



2949 



2949 



1628 



1686 



888 



861 

 1122 





Nature of bot- 

 tom. 



Date. 



o 

 38 



40 

 40 



37 

 37 

 39 



39 

 38 



Globigerina ooze 

 tUobigerina ooze 



Gray inud i 



Gray murt ' 



Globigerina ooze 

 Globifierina ooze 

 Globijierina ooze' 

 Globigerina ooze, 

 Globigerina ooze' 

 Brown mud, iine 

 sand. 



Green mud , 



Green mud I 



1883 

 Jnlv 18 

 July 

 Sept. 

 Sept. 

 Sept. 



1 



Oct 

 Oct. 

 Oct. 

 Oct. 

 Xov. 



1884. 

 July 23 I 1 

 Aug. 5 I 



28 



5 



5 

 30 



2 



2 



3 



3 

 11 . 1 



1 



If. 



1 



2f. 



ly. 

 2y. 





^ 



1 



2f. 

 2f. 



3y. 



Is. 



'After the number of specimens, y indicates young, s, small, and f, fragmentary. 



Acanthephyra microphthalma, ep. nov. 



The carapax is scarcely as broad in front as at the middle of the 

 branchial region, and is neither compressed nor carinated dorsally, but 

 broadly rounded, except at the high and laterally compressed base of 

 the very slender rostrum, which is strongly upturned, wholly unarmed 

 above except by three very obscure teeth above the orbit, and armed 

 beneath with a series of about seven small and nearly equidistant 

 teeth on the distal two thirds of the length, but not quite reaching the 

 very slender and acute tip. The orbital sinus is much smaller than in 

 A. Agassizii, the lobe beneath is much broader and somewhat truncated, 

 and the antennal and branchiostegial spines are less prominent. 



The eye-stalks are much shorter than in A. Affassizii, strongly tapered 

 from near the base to the minute brownish eyes, which are placed ob- 

 liquely upon the outer side of the tip of the stalk. 



The proximal segment of the peduncle of the antennula is less deeply 

 excavated for the reception of the eye than in A. Agassizii, and the ex- 

 panded proximal portion of the outer tiagellum is a little narrower, but 

 otherwise the antennula is as in that species. 



The antennal scale is about two thirds as long as the carapax exclud- 

 ing the rostrum, near the base about a fourth as broad as long, and 



