420 



TRICOMA AND OTHER NEW NEMATODE GENERA, 



intestine is three-fourths as wide as the body and is built of cells 

 of such a size that ten side by side make up the circumference. 

 I could discover nothing concerning the ventral excretory gland. 

 The longitudinal fields are one-fifth as wide as the body and are 

 finely striated longitudinally. The tail is sub-cylindroid and is 

 rounded at the terminus. There are no caudal glands. The eggs 

 are arranged in a single row in the uterus ; tlie ova, on the other 

 hand, are in two or three parallel rows. Male unknown. 

 Hah. — Marine sand, Bay of Naples, 1888. 



XII. Fimbria, new genus. 

 E. TENUIS, n.sp. Female unknown. 



•2 14-5 24- 



50 



93- 



.3 j^. j.^ j.g .9 1-48 inm. The cuticle is not striated. 



Hairs abound on the tail, but are not conspicuous elsewhere. 

 The neck is conoid to the slightly expanded 

 naked head, which is rounded in front 

 and contains a simple prismoid pharynx 

 nearly half as wide as the 

 head itself. The mouth 

 is surrounded by minute 

 bristles or bristle-bearing 

 papillae. The oesophagus, 

 at first only one-half as 

 wade as the neck, becomes 

 in the cardiac region 

 three-fourths as wide as 

 the neck. The cardia is 

 large and stains deeply 

 with carmine; the cardiac 

 constriction is deep. The 

 intestine is three-fourths as wide as the body, 

 and is composed of cells of such a size that six 

 side by side build the circumference. The 

 lateral fields contain scattered pigment granules. The ventral 

 gland consists of a large elongated cell, situated as far behind the 



Fig. 14.— I,male of Fim- 

 bria tenuis. II, III, and IV, 

 head, tail, and spiculum of 

 the same worm more highly 

 magnified. 



a, cephalic setae. 

 h, pharj'nx. 



c, organ of unknown function. 



d, nerve-ring. 



e, excretory pore. 



/, cardiac constriction. 

 g, ventral excretory gland. 

 h, anus. 



i, junction of the two tes- 

 ticles. 

 j, terminus of tail. 

 k, proximal end of spiculum. 

 I, anus. 

 in, distal end of spiculum. 



