228 SMITHSOXIAX MISCELLANEOUS COLLECTIONS VOL- 52 



Ends of basal rays just visible as more or less irregular tubercles 

 in the angles of the calyx ; radials quite concealed in the median 

 line of the arm. though sometimes slightly visible over the ends of 

 the basal rays ; first costals very short, three or four times as broad 

 as long, triangular, apex downward, laterally in close apposition, the 

 dorsal surface coarsely rugose ; costal axillaries triangular, rather 

 more than twice as broad as long, the dorsal surface rugose ; dis- 

 tichals 4 (3 + 4), rarely 2; palmars 2 (i -|- 2), developed interiorly 

 in I, 2, 2, I order as a rule; first distichal more or less covered with 

 small crowded tubercles, but the remaining joints of the division- 

 series perfectly smooth ; division-series and proximal six or eight 

 brachials in close apposition and sharply flattened laterally. Twenty- 

 eight arms (in the type) ; proximal twelve or fourteen brachials 

 oblong, about twice as broad as long, then becoming triangular and 

 nearly as long as broad, and in the distal part of the arm wedge- 

 shaped and longer than broad. The first syzygy is usually between 

 the first two brachials, but may be between the third and fourth, 

 especially in arms springing direct from a distichal axillary ; in arms 

 where the first and second brachials are united by syzygy the third 

 and fourth are often similarly united, the next syzygy is near the 

 nineteenth to the twenty-fifth brachial (usually between the twen- 

 tieth and twenty-first or one or two joints farther on), and the distal 

 intersyzygial interval is from four to twelve (usually six or seven) 

 oblique muscular articulations. 



Distichal pinnule 13 mm. long, slender and evenly tapering, flag- 

 ellate distally, with about 45 joints, in the proximal half about once 

 and one-half as broad as long, becoming squarish distally ; first 

 brachial pinnule similar, but only about 9 mm. long with 35 joints, 

 the first five of which are noticeably carinate ; second brachial pinuule 

 about the same length, but with only about 25 joints, the first four 

 or five of which are carinate and slightly broader than those of the 

 first pinnule, the terminal joints being about twice as long as broad. 

 In the following pinnules the joints, except the first two, gradually 

 become longer and fewer in number; the tenth pinnule is 8 mm. 

 long with 17 joints, the first two not so long as broad and bearing 

 a triangular or bluntly triangular process distally, the remainder 

 squarish, gradually becoming slightly longer than broad ; third to the 

 seventh or eighth joints very slightly enlarged, protecting the genital 

 glands, but the enlargement is not very noticeable and tapers off 

 evenly in both directions; distal pinnules 9 mm. long with 17 or 18 

 joints, the first short and wedge-shaped, the second not quite so long 

 as broad, the remainder approximately half again as long as broad. 



