LINHOMOELLA, NANNOLAIMUS 255 



Habitat: Sand-bar, Biscayne Bay, off the mouth of the Miami River, Florida, 

 U. S. A. Flemming to glycerine jelly. Fig. 35, p. 254. The almost impercep- 

 tible constriction occurring in the cephalic region, as shown in the illustration, 

 is somewhat more marked when seen dorso-ventrally; the amphids are located 

 in the midst of a broad and shallow depression. 



...- _____ ..... 1 .. 



36. Nannolaimus guttatus n. sp. / 1A U5 l -5 ** *-5 Cuticle of me- 



dium thickness, naked except for the cephalic setae, of which there is a circlet of 

 ten, with a circlet of six immediately preceding it. There are, however, a few, 

 scattered setae on the neck, one-third as long as the neck is wide, arranged at 

 right angles to the surface. Lips confluent, very small, thin and minute, prob- 

 ably six in number. No labial papillae have been seen. Pharynx almost non- 

 existent, simple, conoid. Neck cylindroid. The oesophagus is at first one-half, 

 near the nerve-ring two-sevenths, and finally two-thirds, as wide as the corre- 

 sponding portion of the neck; its lining is subdistinct, wtnJi/fi) 



its musculature fine and colorless. There is a hemi- "" --*i*L ' 

 spherical cardia, one-fourth as wide as the base of the 

 neck. The thick-walled intestine, which is set off by a 

 collum one-fourth as wide as the base of the neck, 

 becomes at once two-thirds as wide as the body. Ante- 

 riorly its lumen is faint, but posteriorly it is distinct, set 

 The cross-section of the intestine is composed of about 

 three cells. The granules contained in these cells are 

 scattered to numerous, and are of variable size, the 



largest having a diameter equal to the width of two of the adjacent annules. 

 They have the appearance of hollow shells, more or less thick-walled. The 

 conoid tail tapers from the anus to its terminus, which is one-third as wide as 

 its base. Though the caudal glands were not clearly seen, they appear to be 

 broadly saccate and to be arranged in a close tandem behind the anus in the ante- 

 rior half of the tail. There appear to be about three slender, somewhat cylin- 

 droid, subacute setae on each submedian line on the tail. The lateral fields are 

 two-fifths as wide as the body. The huge renette cell begins at the cardia and 

 extends backward a distance equal to the length of the neck. It is two-fifths 

 as wide as the body, and, of course, is not reflexed. It is granular and possesses 

 a large nucleus. The elongated ampulla is one-third as wide as the head and emp- 

 ties through a short duct near the base of the lips. Vulva more or less continu- 

 ous, small; cutinized vagina of medium size. The thin-shelled, elongated eggs 

 are probably five to six times as long as the body is wide. According to the con- 

 dition of the uterus, the broad tapering ovaries reach from three-fifths to the 

 whole of the distance back to the vulva. They contain about a dozen ova 

 arranged more or less single file, except near the blind end. 



Habitat: Sand, Cape Florida, Biscayne Bay, Florida, U. S. A. Flemming to 

 glycerine jelly. This genus resembles Cyatholaimus more or less but has no 

 onchia and the excretory pore is farther forward. The labial features are small- 

 er and less definite than in Cyatholaimus. It is notable also that no pores are 

 to be seen in the cuticle. The oesophagus ends behind in an almost impercep- 

 tible elongated swelling. The color of the ocelli, through oversight, was not 

 noted. Until the male is known, the affinities will remain doubtful. Fig. 36. 



