374 PROCEEDINGS OF THE AMERICAN ACADEMY. 



ing the projection which is 7 X 2 ^i. Basal cell, including foot, 

 8-16 n. Total length of body 50-66 X 35-40 /x. 



On legs of Discopoma sp. Trinidad, No. 2433. 



Although seven specimens in perfect condition and of various ages 

 have been examined, I have seen no indication of an antheridium. 

 The base of the trichogyne persists as a minute dark rounded body 

 below the base of the upgrowth from the inner terminal wall-cell. 



Rickia inclinata nov. sp. 



Minute, hyaline, of irregularly rounded form. Basal cell forming 

 a well defined slender stalk, the upper third or half inserted in the 

 angle between the two basal cells of the marginal rows. Anterior 

 marginal row not extending above the base of the perithecium, con- 

 sisting of two radially elongated cells which are subequal and cut off 

 distally and externally two to three appendiculate cells: posterior 

 marginal row consisting of seven cells like those of the anterior, exter- 

 nally convex, the second to the fourth more radially elongate than 

 those above, which are successively smaller; the basal usually sepa- 

 rating one, the rest two appendiculate cells distally and externally; 

 the terminal cell much flattened followed by the broad basal cell of 

 the primary appendage, which appears to be a member of the series, 

 its inner margin in contact with the fourth cell of the median series : 

 median series of four subequal irregularly rounded cells. Perithe- 

 cium stout, its axis straight and characteristically tilted inward at a 

 slight angle to that of the receptacle, its base in contact with the 

 distal cell of the anterior series, externally wholly free; the tip quite 

 free, bent very slightly outward, the apex broad, flat, each lip-cell 

 projecting very slightly and somewhat irregularly. Spores 25 X 3 /x 

 (in perithecium). Perithecium 38-40 X 11 m- Basal cell, including 

 foot, 25 X 8 yu. Total length of body to tip of perithecium 50 X 41- 

 44 /x. Appendages hyaline, tapering very slightly, 16 X 3 /x, with 

 clearly defined dark basal septa. 



On a minute mite, as yet undetermined. Trinidad, No. 2307. 



A characteristic and minute species, distinguished by its tilted 

 perithecium, which is externally free. It is closely allied to R. Celae- 

 nopsis, from which it differs in the number and arrangement of its 

 cells, etc. I have been unable to dete mine the presence of an an- 

 theridium in either of the two adult types. 



