1894. PROCEEDINGS OF TEE NATIONAL MUSEUM. 73 



Subfamily Microrhynchin^. 



NEORHYNCHUS DEPRESSUS, (Boll). 



Microrhynchus dcjyrefisiis, Bell, Trans. Zool. Soc. Lond., ii, p. 42, pi. S, fig. 2, 1835. 

 Ncorhi/tirhiifi dcpresfiux, A. Milne-Edwakds, op. cit., p. 187, 1879. 



ITitherto only the female of this species has been known. The abdo- 

 men of the male has a long, acute, horizontal spine on the first seg- 

 ment as in the female; the outer margins of the fifth and following seg- 

 ments are nearly parallel; terminal segment rounded; sixth and seventh 

 anchylosed. The abdomen figured by Bell is that of an immature 

 female; in mature females the fifth or anchylosed segment is much wider 

 than long, the distal margin slightly concave. The chelipeds of the 

 male are weak as in the female. Of the ambulatory legs the second 

 pair is the longest and the first the shortest, fringed with long hairs; 

 second pair less hairy, third and fourth pairs slightly hairy. Last pair 

 shorter than the third. The basal antennal joint has the inner margin 

 irregularly dentate, the antero-internal tooth blunt, not so far advanced 

 as the autero- external, which is slightly incurved, rounded. 



MeusurvmenU. — Length of carapace (of largest specimen, a female), 

 18; width, 17; length to tip of abdominal spine, 23 mm. Length of car- 

 apace (of male), 12.5; width, 11.5 mm. 



Local It ij.—VtwU of California, lat. 24° IG' N., long. 110^ 22' W., 21 

 fathoms, gray sand, broken shells, April 30, 18SS; station 2S22, U. S. 

 Fish Commission steamer Albatross (18L43). 



PYROMAIA CUSPID ATA, 8t imp son. 



Pi/romain cnspklata, Stimpson, Bull. Mas. Conip. Zool., ii, p. 110, 1870. — A. Milne 



Edwards, op. cit., p. 177, pi. xxxvi, fig. 2, 1879. 

 Apiomala cmpidata, voN Martens, Zool. Rec, 1871, p. 182. — Miers, Jour. Linn. 



Soc. London, xiv, p. {\'A, 1879. 



The Albatross spe(dmens of this species are much larger than those 

 described by Stimpson and A. Milne-Edwards. The dorsal si»ines are 

 not short and tuberculous, but slender and prominent; of those on the 

 median line, the posterior gastric, the anterior cardiac, the posterior, 

 and the abdominal spine are longer than the others. There is an acute 

 triangular interantennular spine, i)ointing forward. The chelipeds of 

 the adult male are stouter than those figured by A. Milne-Edwards and 

 are spinulous. Merus with longitudinal rows of short spines with one 

 longer and very slender spine at its distal upper extremity. All the 

 spinules or sjunes of the carpus are short. The basal portion of the 

 propodas is tumid, longer than the fingers, which touch almost to their 

 base where there is a slight opening. The ambulatory legs are spinu- 

 lous; the meral joints have an erect spine near the ischial joint, and 

 short spines on the condyles articulating with the carpal joints. 



In females and young the ambulatory legs are almost smooth to the 

 touch, but the spinules can be seen with the lens. A female, 27 mm. 

 long, bearing eggs, from station 2601, is unique in having no sjjiue at 



