96 UNITED STATES NATIONAL MUSEUM BULLETIN 29 6 



The mandibular palps are long, paired appendages lying laterally 

 to the mandibles along the edge of the labrum. They are the longest 

 of the paired mouthparts. They have four strong bristles on their 

 medial edges, and the terminal bristle seems to be articulated on a 

 separate projection. 



The first pair of maxillae are not currently considered of taxonomic 

 importance. They are the usual short blunt appendages with many 

 bristles of approximately equal length on one end and a long, hooked 

 apodeme on the other. The apodeme is a thickened support for muscle 

 attachments. 



The second pair of maxUlae is flattened and leaf -like, and nearly 

 meet in the center in preserved specimens. They appear to serve as 

 the bottom of the chewing area. Numerous soft bristles line the distal 

 edges. A pair of projections also bearing bristles apparently are 

 attached to the second maxillae on the side toward the first maxillae. 

 These might be considered maxillary (labial) palps, or just additional 

 parts of the maxillae. They are not described in other species of the 

 cryptophialids. 



From the mouthparts, already described, the esophagus extends 

 dorsally as a narrow tube, bending posteriorly just before the gizzard. 

 The gizzard has two rows of teeth. Posterior to the teeth the gizzard 

 is subdivided into six radiating pyramidal portions with their apices 

 directed inwardly. The stomach is just posterior to the gizzard and 

 is large and soft walled. Although the esophagus and gizzard can 

 withstand boiling in 10-percent KOH, the stomach cannot. A char- 

 acteristic mass of material lies at the posterior end of the stomach, 

 even in corroded specimens. This intestine extends into the posterior 

 end of the thorax and terminates as a slit-like anus between the two 

 sets of paired thoracic cirri on the dorsal side. 



The male: The male does not exhibit the large penis possessed by 

 other members of the genus. Two specimens with very small penises 

 were found, while about 20 males carefully examined did not possess 

 a penis. Males occasionally adhere to the female (seen in ventral view 

 in fig. 24a), but are more abundant in the burrow. The specimen 

 adhering to the type female measures 0.32 X 0.13 mm. The male 

 integument contains peg plates, obvious polygons bearing numerous 

 dark spots. This is common in the genus. 



The larva: No detailed study of larval development was made on 

 this species. The eggs are deposited in a brood pouch which is dorsal 

 to the posterior part of the thorax. It contains two body appendages 

 which may aid in maintaining the larvae. The eggs are retained until 

 the cyprid stage. 



